1
|
Andrews L, Keller S, Ratcliffe C, Osman-Farah J, Shepherd H, Bhojak M, Macerollo A. Exploring White Matter Microstructure with Symptom Severity and Outcomes Following Deep Brain Stimulation in Tremor Syndromes. Tremor Other Hyperkinet Mov (N Y) 2024; 14:43. [PMID: 39220675 PMCID: PMC11363889 DOI: 10.5334/tohm.904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Accepted: 04/17/2024] [Indexed: 09/04/2024] Open
Abstract
Background Essential tremor (ET) and dystonic tremor (DT) are movement disorders that cause debilitating symptoms, significantly impacting daily activities and quality of life. A poor understanding of their pathophysiology, as well as the mediators of clinical outcomes following deep brain stimulation (DBS), highlights the need for biomarkers to accurately characterise and optimally treat patients. Objectives We assessed the white matter microstructure of pathways implicated in the pathophysiology and therapeutic intervention in a retrospective cohort of patients with DT (n = 17) and ET (n = 19). We aimed to identity associations between white matter microstructure, upper limb tremor severity, and tremor improvement following DBS. Methods A fixel-based analysis pipeline was implemented to investigate white matter microstructural metrics in the whole brain, cerebello-thalamic pathways and tracts connected to stimulation volumes following DBS. Associations with preoperative and postoperative severity were analysed within each disorder group and across combined disorder groups. Results DBS led to significant improvements in both groups. No group differences in stimulation positions were identified. When white matter microstructural data was aligned according to the maximally affected upper limb, increased fiber density, and combined fiber density & cross-section of fixels in the left cerebellum were associated with greater tremor severity across DT and ET patients. White matter microstructure did not show associations with postoperative changes in cerebello-thalamic pathways, or tracts connected to stimulation volumes. Discussion Diffusion changes of the cerebellum are associated with the severity of upper limb tremor and appear to overlap in essential or dystonic tremor disorders.
Collapse
Affiliation(s)
- Luke Andrews
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, UK
| | - Simon Keller
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, UK
| | - Corey Ratcliffe
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, UK
| | - Jibril Osman-Farah
- The Walton Centre NHS Foundation Trust for Neurology and Neurosurgery, Liverpool, UK
| | - Hilary Shepherd
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, UK
- The Walton Centre NHS Foundation Trust for Neurology and Neurosurgery, Liverpool, UK
| | - Maneesh Bhojak
- The Walton Centre NHS Foundation Trust for Neurology and Neurosurgery, Liverpool, UK
| | - Antonella Macerollo
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, UK
- The Walton Centre NHS Foundation Trust for Neurology and Neurosurgery, Liverpool, UK
| |
Collapse
|
2
|
Sumarac S, Spencer KA, Steiner LA, Fearon C, Haniff EA, Kühn AA, Hodaie M, Kalia SK, Lozano A, Fasano A, Hutchison WD, Milosevic L. Interrogating basal ganglia circuit function in people with Parkinson's disease and dystonia. eLife 2024; 12:RP90454. [PMID: 39190604 PMCID: PMC11349293 DOI: 10.7554/elife.90454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2024] Open
Abstract
Background The dichotomy between the hypo- versus hyperkinetic nature of Parkinson's disease (PD) and dystonia, respectively, is thought to be reflected in the underlying basal ganglia pathophysiology. In this study, we investigated differences in globus pallidus internus (GPi) neuronal activity, and short- and long-term plasticity of direct pathway projections. Methods Using microelectrode recording data collected from the GPi during deep brain stimulation surgery, we compared neuronal spiketrain features between people with PD and those with dystonia, as well as correlated neuronal features with respective clinical scores. Additionally, we characterized and compared readouts of short- and long-term synaptic plasticity using measures of inhibitory evoked field potentials. Results GPi neurons were slower, bustier, and less regular in dystonia. In PD, symptom severity positively correlated with the power of low-beta frequency spiketrain oscillations. In dystonia, symptom severity negatively correlated with firing rate and positively correlated with neuronal variability and the power of theta frequency spiketrain oscillations. Dystonia was moreover associated with less long-term plasticity and slower synaptic depression. Conclusions We substantiated claims of hyper- versus hypofunctional GPi output in PD versus dystonia, and provided cellular-level validation of the pathological nature of theta and low-beta oscillations in respective disorders. Such circuit changes may be underlain by disease-related differences in plasticity of striato-pallidal synapses. Funding This project was made possible with the financial support of Health Canada through the Canada Brain Research Fund, an innovative partnership between the Government of Canada (through Health Canada) and Brain Canada, and of the Azrieli Foundation (LM), as well as a grant from the Banting Research Foundation in partnership with the Dystonia Medical Research Foundation (LM).
Collapse
Affiliation(s)
- Srdjan Sumarac
- Institute of Biomedical Engineering, University of TorontoTorontoCanada
- Krembil Brain Institute, University Health NetworkTorontoCanada
| | - Kiah A Spencer
- Institute of Biomedical Engineering, University of TorontoTorontoCanada
- Krembil Brain Institute, University Health NetworkTorontoCanada
| | - Leon A Steiner
- Krembil Brain Institute, University Health NetworkTorontoCanada
- Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin BerlinBerlinGermany
- Berlin Institute of Health (BIH)BerlinGermany
| | - Conor Fearon
- Krembil Brain Institute, University Health NetworkTorontoCanada
- Edmond J. Safra Program in Parkinson's Disease, Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western HospitalTorontoCanada
- Department of Neurology, University of TorontoTorontoCanada
| | - Emily A Haniff
- Krembil Brain Institute, University Health NetworkTorontoCanada
| | - Andrea A Kühn
- Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin BerlinBerlinGermany
| | - Mojgan Hodaie
- Krembil Brain Institute, University Health NetworkTorontoCanada
- Institute of Medical Sciences, University of TorontoTorontoCanada
- Center for Advancing Neurotechnological Innovation to Application (CRANIA)TorontoCanada
- Department of Surgery, University of TorontoTorontoCanada
| | - Suneil K Kalia
- Krembil Brain Institute, University Health NetworkTorontoCanada
- Center for Advancing Neurotechnological Innovation to Application (CRANIA)TorontoCanada
- Department of Surgery, University of TorontoTorontoCanada
- KITE, University Health NetworkTorontoCanada
| | - Andres Lozano
- Krembil Brain Institute, University Health NetworkTorontoCanada
- Institute of Medical Sciences, University of TorontoTorontoCanada
- Center for Advancing Neurotechnological Innovation to Application (CRANIA)TorontoCanada
- Department of Surgery, University of TorontoTorontoCanada
| | - Alfonso Fasano
- Krembil Brain Institute, University Health NetworkTorontoCanada
- Edmond J. Safra Program in Parkinson's Disease, Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western HospitalTorontoCanada
- Department of Neurology, University of TorontoTorontoCanada
- Institute of Medical Sciences, University of TorontoTorontoCanada
- Center for Advancing Neurotechnological Innovation to Application (CRANIA)TorontoCanada
| | - William Duncan Hutchison
- Krembil Brain Institute, University Health NetworkTorontoCanada
- Center for Advancing Neurotechnological Innovation to Application (CRANIA)TorontoCanada
- Department of Surgery, University of TorontoTorontoCanada
- Department of Physiology, University of TorontoTorontoCanada
| | - Luka Milosevic
- Institute of Biomedical Engineering, University of TorontoTorontoCanada
- Krembil Brain Institute, University Health NetworkTorontoCanada
- Institute of Medical Sciences, University of TorontoTorontoCanada
- Center for Advancing Neurotechnological Innovation to Application (CRANIA)TorontoCanada
- KITE, University Health NetworkTorontoCanada
| |
Collapse
|
3
|
Higginbotham L, Scorr LM, Parra SP, Sommerfeld B, Jinnah HA, Factor SA. Prevalence and clinical features of cervical dystonia in Parkinson's disease. Parkinsonism Relat Disord 2024; 127:107114. [PMID: 39197296 DOI: 10.1016/j.parkreldis.2024.107114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 08/20/2024] [Accepted: 08/22/2024] [Indexed: 09/01/2024]
Abstract
OBJECTIVE To study the prevalence and clinical features of cervical dystonia in Parkinson's disease (CD-PD). BACKGROUND PD features various forms of dystonia, including CD. Yet, the prevalence and clinical features of CD in PD patients are not well-characterized. METHODS We conducted a single site, prospective study where consecutively evaluated PD patients were examined for the presence of CD to ascertain its prevalence. For each case of CD-PD, a standardized questionnaire assessing demographic and clinical features was completed. Statistical analysis was performed to compare CD-PD characteristics to those of a previously published large idiopathic CD cohort. RESULTS Of 301 consecutive PD patients evaluated, 28 (9.3 %) had CD, far surpassing estimates of CD prevalence in the general population. This CD-PD cohort was predominantly male (71 %) with a mean age of 70.9 ± 8.1 years. The mean duration of PD was 10.4 ± 6.7 years. In most cases (n = 19, 68 %), CD developed after the onset of PD. Five patients reported dystonia improvements in response to levodopa, while none reported medication-induced worsening. In contrast to CD-PD, those with ICD (n = 209) were on average younger (59.7 ± 10.1) and mostly female (74 %, p < 0.001). In addition, CD-PD was overall less severe as measured by the Global Dystonia Rating Scale (GDRS) (p = 0.002) and featured less head tremor and pain. CONCLUSION Our findings indicate CD is overrepresented in PD compared to the general population and has clinical features distinct from those of ICD. These results justify larger, more comprehensive studies of CD-PD to better understand its frequency, pathophysiology, clinical characteristics, and associated risk factors.
Collapse
Affiliation(s)
- Lenora Higginbotham
- Jean and Paul Amos Parkinson's Disease and Movement Disorder Program, Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA
| | - Laura M Scorr
- Jean and Paul Amos Parkinson's Disease and Movement Disorder Program, Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA
| | - Sahyli Perez Parra
- Medical Specialists of the Palm Beaches Neurology, Inc., Atlantis, FL, USA
| | - Barbara Sommerfeld
- Jean and Paul Amos Parkinson's Disease and Movement Disorder Program, Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA
| | - Hyder A Jinnah
- Jean and Paul Amos Parkinson's Disease and Movement Disorder Program, Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA
| | - Stewart A Factor
- Jean and Paul Amos Parkinson's Disease and Movement Disorder Program, Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA.
| |
Collapse
|
4
|
Lee CW, Krüger MT, Akram H, Zrinzo L, Rubin J, Birchall MA, Fishman JM. Central Mechanisms and Pathophysiology of Laryngeal Dystonia: An Up-to-Date Review. J Voice 2024:S0892-1997(24)00217-0. [PMID: 39138040 DOI: 10.1016/j.jvoice.2024.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 07/06/2024] [Accepted: 07/07/2024] [Indexed: 08/15/2024]
Abstract
OBJECTIVE Laryngeal dystonia (LD), previously termed spasmodic dysphonia, is an isolated focal dystonia that involves involuntary, uncontrolled contractions of the laryngeal muscles during speech. It is a severely disabling condition affecting patients' work and social lives through prevention of normal speech production. Our understanding of the pathophysiology of LD and available therapeutic options are currently limited. The aim of this short review is to provide an up-to-date summary of what is known about the central mechanisms and the pathophysiology of LD. METHODS A systematic review of the literature was performed searching Embase, CINHAL, Medline, and Cochrane with the cover period January 1990-October 2023 with a search strategy (("Laryngeal dystonia" OR "Spasmodic dysphonia") AND ("Central Mechanism" OR "Pathophysiology")). Original studies involving LD patients that discussed central mechanisms and/or pathophysiology of LD were chosen. RESULTS Two hundred twenty-six articles were identified of which 27 articles were included to formulate this systematic review following the screening inclusion and exclusion criteria. LD is a central neurological disorder involving a multiregional altered neural network. Affected neural circuits not only involve the motor control circuit, but also the feedforward, and the feedback circuits of the normal speech production neural network, involving higher-order planning, somatosensory perception and integration regions of the brain. CONCLUSION Speech production is a complex process, and LD is a central neurological disorder involving multiregional neural network connectivity alteration reflecting this. Neuromodulation targeting the central nervous system could therefore be considered and explored as a new potential therapeutic option for LD in the future, and should assist in elucidating the underlying central mechanisms responsible for causing the condition.
Collapse
Affiliation(s)
- Chang Woo Lee
- Department of Otolaryngology-Head and Neck Surgery, University Hospitals Dorset NHS Foundation Trust, Poole, UK.
| | - Marie T Krüger
- Department of Neurosurgery, UCL Functional Neurosurgery Unit, National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Trust, London, UK; Department of Neurosurgery, University Medical Centre, Freiburg, Germany
| | - Harith Akram
- Department of Neurosurgery, UCL Functional Neurosurgery Unit, National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Trust, London, UK
| | - Ludvic Zrinzo
- Department of Neurosurgery, UCL Functional Neurosurgery Unit, National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Trust, London, UK
| | - John Rubin
- Department of Otolaryngology-Head and Neck Surgery, The Royal National ENT Voice Centre, The Royal National ENT Hospital, University College London Hospitals NHS Trust, London, UK
| | - Martin A Birchall
- Department of Otolaryngology-Head and Neck Surgery, The Royal National ENT Voice Centre, The Royal National ENT Hospital, University College London Hospitals NHS Trust, London, UK
| | - Jonathan M Fishman
- Department of Otolaryngology-Head and Neck Surgery, The Royal National ENT Voice Centre, The Royal National ENT Hospital, University College London Hospitals NHS Trust, London, UK
| |
Collapse
|
5
|
Xu J, Mawase F, Schieber MH. Evolution, biomechanics, and neurobiology converge to explain selective finger motor control. Physiol Rev 2024; 104:983-1020. [PMID: 38385888 DOI: 10.1152/physrev.00030.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 01/16/2024] [Accepted: 02/15/2024] [Indexed: 02/23/2024] Open
Abstract
Humans use their fingers to perform a variety of tasks, from simple grasping to manipulating objects, to typing and playing musical instruments, a variety wider than any other species. The more sophisticated the task, the more it involves individuated finger movements, those in which one or more selected fingers perform an intended action while the motion of other digits is constrained. Here we review the neurobiology of such individuated finger movements. We consider their evolutionary origins, the extent to which finger movements are in fact individuated, and the evolved features of neuromuscular control that both enable and limit individuation. We go on to discuss other features of motor control that combine with individuation to create dexterity, the impairment of individuation by disease, and the broad extent of capabilities that individuation confers on humans. We comment on the challenges facing the development of a truly dexterous bionic hand. We conclude by identifying topics for future investigation that will advance our understanding of how neural networks interact across multiple regions of the central nervous system to create individuated movements for the skills humans use to express their cognitive activity.
Collapse
Affiliation(s)
- Jing Xu
- Department of Kinesiology, University of Georgia, Athens, Georgia, United States
| | - Firas Mawase
- Department of Biomedical Engineering, Israel Institute of Technology, Haifa, Israel
| | - Marc H Schieber
- Departments of Neurology and Neuroscience, University of Rochester, Rochester, New York, United States
| |
Collapse
|
6
|
Lewis SA, Forstrom J, Tavani J, Schafer R, Tiede Z, Padilla-Lopez SR, Kruer MC. eIF2α phosphorylation evokes dystonia-like movements with D2-receptor and cholinergic origin and abnormal neuronal connectivity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.14.594240. [PMID: 38798458 PMCID: PMC11118466 DOI: 10.1101/2024.05.14.594240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Dystonia is the 3rd most common movement disorder. Dystonia is acquired through either injury or genetic mutations, with poorly understood molecular and cellular mechanisms. Eukaryotic initiation factor alpha (eIF2α) controls cell state including neuronal plasticity via protein translation control and expression of ATF4. Dysregulated eIF2α phosphorylation (eIF2α-P) occurs in dystonia patients and models including DYT1, but the consequences are unknown. We increased/decreased eIF2α-P and tested motor control and neuronal properties in a Drosophila model. Bidirectionally altering eIF2α-P produced dystonia-like abnormal posturing and dyskinetic movements in flies. These movements were also observed with expression of the DYT1 risk allele. We identified cholinergic and D2-receptor neuroanatomical origins of these dyskinetic movements caused by genetic manipulations to dystonia molecular candidates eIF2α-P, ATF4, or DYT1, with evidence for decreased cholinergic release. In vivo, increased and decreased eIF2α-P increase synaptic connectivity at the NMJ with increased terminal size and bouton synaptic release sites. Long-term treatment of elevated eIF2α-P with ISRIB restored adult longevity, but not performance in a motor assay. Disrupted eIF2α-P signaling may alter neuronal connectivity, change synaptic release, and drive motor circuit changes in dystonia.
Collapse
Affiliation(s)
- Sara A Lewis
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA
- Departments of Child Health, Cellular & Molecular Medicine, Genetics, and Neurology, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - Jacob Forstrom
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA
- Departments of Child Health, Cellular & Molecular Medicine, Genetics, and Neurology, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - Jennifer Tavani
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA
- Departments of Child Health, Cellular & Molecular Medicine, Genetics, and Neurology, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - Robert Schafer
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA
- Departments of Child Health, Cellular & Molecular Medicine, Genetics, and Neurology, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - Zach Tiede
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA
- Departments of Child Health, Cellular & Molecular Medicine, Genetics, and Neurology, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - Sergio R Padilla-Lopez
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA
- Departments of Child Health, Cellular & Molecular Medicine, Genetics, and Neurology, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - Michael C Kruer
- Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA
- Departments of Child Health, Cellular & Molecular Medicine, Genetics, and Neurology, University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
- Programs in Neuroscience, Molecular & Cellular Biology, and Biomedical Informatics, Arizona State University, Tempe, AZ USA
| |
Collapse
|
7
|
Hart MG, Polyhronopoulos N, Sandhu MK, Honey CR. Deep Brain Stimulation Improves Symptoms of Spasmodic Dysphonia Through Targeting of Thalamic Sensorimotor Connectivity. Neurosurgery 2024; 94:00006123-990000000-01027. [PMID: 38251897 PMCID: PMC11073779 DOI: 10.1227/neu.0000000000002836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/27/2023] [Indexed: 01/23/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Spasmodic dysphonia is a dystonia of the vocal chords producing difficulty with speech. Current hypotheses are that this is a condition of dysregulated thalamic sensory motor integration. A recent randomized controlled trial of thalamic deep brain stimulation (DBS) demonstrated its safety and efficacy. Our objective was to determine whether the outcome could be predicted by stimulation of thalamic sensorimotor areas and adjacent white matter connectivity as assessed by diffusion tractography. METHODS A cohort of 6 participants undergoing thalamic DBS for adductor spasmodic dysphonia was studied. Electrodes were localized with the Lead-DBS toolbox. Group-based analyses were performed with atlases, coordinates, and using voxel-based symptom mapping. Diffusion tensor imaging (3 T, 64 directions, 2-mm isotropic) was used to perform individual probabilistic tractography (cerebellothalamic tract and pallidothalamic tract) and segmentation of the thalamus. Monopolar review was performed at 0.5 V and binarised as effective or ineffective. RESULTS Effective contacts stimulated more of thalamic sensorimotor areas than ineffective contacts (P < .05, false discovery rate corrected). This effect was consistent across analytical and statistical techniques. Group-level and tractography analyses did not identify a specific "sweet spot" suggesting the benefit of DBS is derived from modulating individual thalamic sensorimotor areas. Stimulations at 1 year involved predicted thalamic sensorimotor regions with additional cerebellothalamic tract involvement. CONCLUSION Stimulation of thalamic sensorimotor areas was associated with improvement in symptoms of spasmodic dysphonia. These data are consistent with DBS acting on pathophysiologically dysregulated thalamic sensorimotor integration in spasmodic dysphonia.
Collapse
Affiliation(s)
- Michael G. Hart
- St George's, University of London & St George's Hospitals NHS Foundation Trust, Institute of Molecular and Clinical Sciences, Neurosciences Research Centre, London, UK
| | - Nancy Polyhronopoulos
- Division of Neurosurgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mandeep K. Sandhu
- Division of Neurosurgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Christopher R. Honey
- Division of Neurosurgery, University of British Columbia, Vancouver, British Columbia, Canada
| |
Collapse
|
8
|
Rogić Vidaković M, Šoda J, Kuluva JE, Bošković B, Dolić K, Gunjača I. Exploring Neurophysiological Mechanisms and Treatment Efficacies in Laryngeal Dystonia: A Transcranial Magnetic Stimulation Approach. Brain Sci 2023; 13:1591. [PMID: 38002550 PMCID: PMC10669610 DOI: 10.3390/brainsci13111591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/14/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
Laryngeal dystonia (LD), known or termed as spasmodic dysphonia, is a rare movement disorder with an unknown cause affecting the intrinsic laryngeal muscles. Neurophysiological studies point to perturbed inhibitory processes, while conventional genetic studies reveal fragments of genetic architecture in LD. The study's aims are to (1) describe transcranial magnetic stimulation (TMS) methodology for studying the functional integrity of the corticospinal tract by stimulating the primary motor cortex (M1) for laryngeal muscle representation and recording motor evoked potentials (MEPs) from laryngeal muscles; (2) evaluate the results of TMS studies investigating the cortical silent period (cSP) in LD; and (3) present the standard treatments of LD, as well as the results of new theoretical views and treatment approaches like repetitive TMS and laryngeal vibration over the laryngeal muscles as the recent research attempts in treatment of LD. Neurophysiological findings point to a shortened duration of cSP in adductor LD and altered cSP duration in abductor LD individuals. Future TMS studies could further investigate the role of cSP in relation to standard laryngological measures and treatment options. A better understanding of the neurophysiological mechanisms might give new perspectives for the treatment of LD.
Collapse
Affiliation(s)
- Maja Rogić Vidaković
- Laboratory for Human and Experimental Neurophysiology, Department of Neuroscience, School of Medicine, University of Split, 21000 Split, Croatia
| | - Joško Šoda
- Signal Processing, Analysis and Advanced Diagnostics Research and Education Laboratory (SPAADREL), Faculty of Maritime Studies, University of Split, 21000 Split, Croatia;
| | | | - Braco Bošković
- Department of Otorhinolaryngology, University Hospital of Split, 21000 Split, Croatia;
| | - Krešimir Dolić
- Department of Interventional and Diagnostic Radiology, University Hospital of Split, 21000 Split, Croatia;
- Department of Radiology, School of Medicine, University of Split, 21000 Split, Croatia
| | - Ivana Gunjača
- Department of Biology and Human Genetics, School of Medicine, University of Split, 21000 Split, Croatia
| |
Collapse
|
9
|
Kuo YL, Chen M, Kimberley TJ. Probing the inhibitory motor circuits in adductor laryngeal dystonia during a dystonia-unrelated task. Parkinsonism Relat Disord 2023; 115:105812. [PMID: 37651926 PMCID: PMC10592018 DOI: 10.1016/j.parkreldis.2023.105812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 08/04/2023] [Accepted: 08/13/2023] [Indexed: 09/02/2023]
Abstract
BACKGROUND The pathophysiology of adductor laryngeal dystonia (AdLD) remains unknown; however, there is growing evidence that dystonia is associated with disruptions in the inhibitory regulation of sensorimotor cortical areas. Using functional MRI (fMRI) and transcranial magnetic stimulation (TMS) complementarily, we previously demonstrated an overly activated laryngeal motor cortex and revealed correlations between blood-oxygen-level dependent (BOLD) activation and intracortical inhibition in a phonation (dystonia-related) task in adductor laryngeal dystonia (AdLD). OBJECTIVE Here, we aimed to characterize the brain-based findings in the primary motor cortex (M1) during a dystonia-unrelated (finger tapping) task in AdLD and controls (CTL). METHODS We examined the between-group differences in task-dependent BOLD activation and intracortical inhibition, measured by the TMS-evoked cortical silent period (cSP), in the M1. The correlations between fMRI and TMS responses were assessed. RESULTS There is more broadly dispersed BOLD activation, not confined to the hand motor cortex, and reduced intracortical inhibition in AdLD compared to CTL. Further, there are more positive correlations between cSP and BOLD activation in a task unrelated to dystonic symptoms in AdLD compared with CTL. This is in contrast to our previous work that demonstrated fewer positive correlations in AdLD during a dystonic phonation task. CONCLUSIONS In unaffected musculature activation, there is dispersed BOLD activation that is correlated with intracortical inhibition suggesting a possible compensatory strategy in the non-dystonic muscles.
Collapse
Affiliation(s)
- Yi-Ling Kuo
- Department of Rehabilitation Sciences, MGH Institute of Health Professions, Boston, MA, USA.
| | - Mo Chen
- Neuroscience Research Program, Gillette Children's Specialty Healthcare, St. Paul, MN, USA; Department of Psychiatry and Behavioral Sciences, University of Minnesota, Minneapolis, MN, USA.
| | - Teresa J Kimberley
- Department of Rehabilitation Sciences, MGH Institute of Health Professions, Boston, MA, USA; Department of Physical Therapy, MGH Institute of Health Professions, Boston, MA, USA.
| |
Collapse
|
10
|
Fan Y, Si Z, Wang L, Zhang L. DYT- TOR1A dystonia: an update on pathogenesis and treatment. Front Neurosci 2023; 17:1216929. [PMID: 37638318 PMCID: PMC10448058 DOI: 10.3389/fnins.2023.1216929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 07/24/2023] [Indexed: 08/29/2023] Open
Abstract
DYT-TOR1A dystonia is a neurological disorder characterized by involuntary muscle contractions and abnormal movements. It is a severe genetic form of dystonia caused by mutations in the TOR1A gene. TorsinA is a member of the AAA + family of adenosine triphosphatases (ATPases) involved in a variety of cellular functions, including protein folding, lipid metabolism, cytoskeletal organization, and nucleocytoskeletal coupling. Almost all patients with TOR1A-related dystonia harbor the same mutation, an in-frame GAG deletion (ΔGAG) in the last of its 5 exons. This recurrent variant results in the deletion of one of two tandem glutamic acid residues (i.e., E302/303) in a protein named torsinA [torsinA(△E)]. Although the mutation is hereditary, not all carriers will develop DYT-TOR1A dystonia, indicating the involvement of other factors in the disease process. The current understanding of the pathophysiology of DYT-TOR1A dystonia involves multiple factors, including abnormal protein folding, signaling between neurons and glial cells, and dysfunction of the protein quality control system. As there are currently no curative treatments for DYT-TOR1A dystonia, progress in research provides insight into its pathogenesis, leading to potential therapeutic and preventative strategies. This review summarizes the latest research advances in the pathogenesis, diagnosis, and treatment of DYT-TOR1A dystonia.
Collapse
Affiliation(s)
- Yuhang Fan
- Department of Neurology, the Second Hospital of Jilin University, Changchun, China
| | - Zhibo Si
- Department of Ophthalmology, the Second Hospital of Jilin University, Changchun, China
| | - Linlin Wang
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Lei Zhang
- Department of Neurology, the Second Hospital of Jilin University, Changchun, China
| |
Collapse
|
11
|
Albanese A, Bhatia KP, Cardoso F, Comella C, Defazio G, Fung VS, Hallett M, Jankovic J, Jinnah HA, Kaji R, Krauss JK, Lang A, Tan EK, Tijssen MA, Vidailhet M. Isolated Cervical Dystonia: Diagnosis and Classification. Mov Disord 2023; 38:1367-1378. [PMID: 36989390 PMCID: PMC10528915 DOI: 10.1002/mds.29387] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/25/2023] [Accepted: 03/07/2023] [Indexed: 03/31/2023] Open
Abstract
This document presents a consensus on the diagnosis and classification of isolated cervical dystonia (iCD) with a review of proposed terminology. The International Parkinson and Movement Disorder Society Dystonia Study Group convened a panel of experts to review the main clinical and diagnostic issues related to iCD and to arrive at a consensus on diagnostic criteria and classification. These criteria are intended for use in clinical research, but also may be used to guide clinical practice. The benchmark is expert clinical observation and evaluation. The criteria aim to systematize the use of terminology as well as the diagnostic process, to make it reproducible across centers and applicable by expert and non-expert clinicians. Although motor abnormalities remain central, increasing recognition has been given to nonmotor manifestations, which are incorporated into the current criteria. Three iCD presentations are described in some detail: idiopathic (focal or segmental) iCD, genetic iCD, and acquired iCD. The relationship between iCD and isolated head tremor is also reviewed. Recognition of idiopathic iCD has two levels of certainty, definite or probable, supported by specific diagnostic criteria. Although a probable diagnosis is appropriate for clinical practice, a higher diagnostic level may be required for specific research studies. The consensus retains elements proven valuable in previous criteria and omits aspects that are no longer justified, thereby encapsulating diagnosis according to current knowledge. As understanding of iCD expands, these criteria will need continuous revision to accommodate new advances. © 2023 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
Collapse
Affiliation(s)
- Alberto Albanese
- Department of Neurology, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Kailash P. Bhatia
- Department of Clinical and Movement Neurosciences, UCL, Queen Square, Institute of Neurology, University College London, London, UK
| | - Francisco Cardoso
- Movement Disorders Unit Hospital das Clínicas, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Cynthia Comella
- Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois, USA
| | - Giovanni Defazio
- Department of Translational Biomedicine and Neuroscience, University of Bari, Bari, Italy
| | - Victor S.C. Fung
- Sydney Medical School, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
- Movement Disorders Unit, Neurology Department, Westmead Hospital, Westmead, Australia
| | - Mark Hallett
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Joseph Jankovic
- Parkinson’s Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston, Texas, USA
| | - Hyder A. Jinnah
- Departments of Neurology, Human Genetics, and Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Ryuji Kaji
- Department of Neurology, National Hospital Organization Utano National Hospital, Kyoto, Japan
| | - Joachim K. Krauss
- Department of Neurosurgery, Medical School Hannover, Hannover, Germany
| | - Anthony Lang
- Edmond J. Safra Program in Parkinson’s Disease, Toronto Western Hospital, University of Toronto, Toronto, Canada
| | - Eng King Tan
- Department of Neurology, National Neuroscience Institute, Singapore General Hospital, Singapore, Singapore
| | - Marina A.J. Tijssen
- Expertise Center Movement Disorders Groningen, Department of Neurology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Marie Vidailhet
- Department of Neurology, Sorbonne Université, Paris, France
- Institut du Cerveau et de la Moelle épinière-Inserm U1127, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| |
Collapse
|
12
|
Zhang R, Nie Y, Dai W, Wang S, Geng X. Balance between pallidal neural oscillations correlated with dystonic activity and severity. Neurobiol Dis 2023:106178. [PMID: 37268239 DOI: 10.1016/j.nbd.2023.106178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/14/2023] [Accepted: 05/28/2023] [Indexed: 06/04/2023] Open
Abstract
BACKGROUND AND OBJECTIVE The balance between neural oscillations provides valuable insights into the organisation of neural oscillations related to brain states, which may play important roles in dystonia. We aim to investigate the relationship of the balance in the globus pallidus internus (GPi) with the dystonic severity under different muscular contraction conditions. METHODS Twenty-one patients with dystonia were recruited. All of them underwent bilateral GPi implantation, and local field potentials (LFPs) from the GPi were recorded via simultaneous surface electromyography. The power spectral ratio between neural oscillations was computed as the measure of neural balance. This ratio was calculated under high and low dystonic muscular contraction conditions, and its correlation with the dystonic severity was assessed using clinical scores. RESULTS The power spectral of the pallidal LFPs peaked in the theta and alpha bands. Within participant comparison showed that the power spectral of the theta oscillations significantly increased during high muscle contraction compared with that during low contraction. The power spectral ratios between the theta and alpha, theta and low beta, and theta and high gamma oscillations were significantly higher during high contraction than during low contraction. The total score and motor score were associated with the power spectral ratio between the low and high beta oscillations, which was correlated with the dystonic severity both during high and low contractions. The power spectral ratios between the low beta and low gamma and between the low beta and high gamma oscillations showed a significantly positive correlation with the total score during both high and low contractions; a correlation with the motor scale score was found only during high contraction. Meanwhile, the power spectral ratio between the theta and alpha oscillations during low contraction showed a significantly negative correlation with the total score. The power spectral ratios between the alpha and high beta, alpha and low gamma, and alpha and high gamma oscillations were significantly correlated with the dystonic severity only during low contraction. CONCLUSION The balance between neural oscillations, as quantified by the power ratio between specific frequency bands, differed between the high and low muscular contraction conditions and was correlated with the dystonic severity. The balance between the low and high beta oscillations was correlated with the dystonic severity during both conditions, making this parameter a new possible biomarker for closed-loop deep brain stimulation in patients with dystonia.
Collapse
Affiliation(s)
- Ruili Zhang
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China; Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence, Fudan University, Ministry of Education, China; MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Zhangjiang Fudan International Innovation Center, Shanghai, China
| | - Yingnan Nie
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China; Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence, Fudan University, Ministry of Education, China; MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Zhangjiang Fudan International Innovation Center, Shanghai, China
| | - Wen Dai
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China; Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence, Fudan University, Ministry of Education, China; MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Zhangjiang Fudan International Innovation Center, Shanghai, China
| | - Shouyan Wang
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China; Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence, Fudan University, Ministry of Education, China; MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Zhangjiang Fudan International Innovation Center, Shanghai, China; Shanghai Engineering Research Center of AI & Robotics, Fudan University, Shanghai, China; Engineering Research Center of AI & Robotics, Ministry of Education, Fudan University, Shanghai, China
| | - Xinyi Geng
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China; Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence, Fudan University, Ministry of Education, China; MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Zhangjiang Fudan International Innovation Center, Shanghai, China.
| |
Collapse
|
13
|
Matar E, Bhatia K. Dystonia and Parkinson's disease: Do they have a shared biology? INTERNATIONAL REVIEW OF NEUROBIOLOGY 2023; 169:347-411. [PMID: 37482398 DOI: 10.1016/bs.irn.2023.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Parkinsonism and dystonia co-occur across many movement disorders and are most encountered in the setting of Parkinson's disease. Here we aim to explore the shared neurobiological underpinnings of dystonia and parkinsonism through the clinical lens of the conditions in which these movement disorders can be seen together. Foregrounding the discussion, we briefly review the circuits of the motor system and the neuroanatomical and neurophysiological aspects of motor control and highlight their relevance to the proposed pathophysiology of parkinsonism and dystonia. Insight into shared biology is then sought from dystonia occurring in PD and other forms of parkinsonism including those disorders in which both can be co-expressed simultaneously. We organize these within a biological schema along with important questions to be addressed in this space.
Collapse
Affiliation(s)
- Elie Matar
- UCL Queen Square Institute of Neurology Department of Clinical and Movement Neurosciences, Queen Square, London, United Kingdom; Central Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, Australia.
| | - Kailash Bhatia
- UCL Queen Square Institute of Neurology Department of Clinical and Movement Neurosciences, Queen Square, London, United Kingdom
| |
Collapse
|
14
|
Lenka A, Pandey S. Dystonia and tremor: Do they have a shared biology? INTERNATIONAL REVIEW OF NEUROBIOLOGY 2023; 169:413-439. [PMID: 37482399 DOI: 10.1016/bs.irn.2023.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Dystonia and tremor are the two most commonly encountered hyperkinetic movement disorders encountered in clinical practice. While there has been substantial progress in the research on these two disorders, there also exists a lot of gray areas. Entities such as dystonic tremor and tremor associated with dystonia occupy a major portion of the "gray zone". In addition, there is a marked clinical heterogeneity and overlap of several clinical and epidemiological features among dystonia and tremor. These facts raise the possibility that dystonia and tremor could be having shared biology. In this chapter, we revisit critical aspects of this possibility that may have important clinical and research implications in the future. We comprehensively review the points in favor and against the theory that dystonia and tremor have shared biology from clinical, epidemiological, genetic and neuroimaging studies.
Collapse
Affiliation(s)
- Abhishek Lenka
- Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, Houston, TX, United States
| | - Sanjay Pandey
- Department of Neurology, Amrita Hospital, Faridabad, Delhi National Capital Region, India.
| |
Collapse
|
15
|
Kuster JK, Levenstein JM, Waugh J, Multhaupt-Buell TJ, Lee MJ, Kim BW, Pagnacco G, Makhlouf ML, Sudarsky LR, Breiter HC, Sharma N, Blood AJ. Sustained activation in basal ganglia and cerebellum after repetitive movement in a non-task-specific dystonia. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.19.533030. [PMID: 36993354 PMCID: PMC10055227 DOI: 10.1101/2023.03.19.533030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
We previously observed sustained fMRI BOLD signal in the basal ganglia in focal hand dystonia patients after a repetitive finger tapping task. Since this was observed in a task-specific dystonia, for which excessive task repetition may play a role in pathogenesis, in the current study we asked if this effect would be observed in a focal dystonia (cervical dystonia [CD]) that is not considered task-specific or thought to result from overuse. We evaluated fMRI BOLD signal time courses before, during, and after the finger tapping task in CD patients. We observed patient/control differences in post-tapping BOLD signal in left putamen and left cerebellum during the non-dominant (left) hand tapping condition, reflecting abnormally sustained BOLD signal in CD. BOLD signals in left putamen and cerebellum were also abnormally elevated in CD during tapping itself and escalated as tapping was repeated. There were no cerebellar differences in the previously studied FHD cohort, either during or after tapping. We conclude that some elements of pathogenesis and/or pathophysiology associated with motor task execution/repetition may not be limited to task-specific dystonias, but there may be regional differences in these effects across dystonias, associated with different types of motor control programs.
Collapse
|
16
|
Li ZY, Tian WT, Huang XJ, Cao L. The Pathogenesis of Paroxysmal Kinesigenic Dyskinesia: Current Concepts. Mov Disord 2023; 38:537-544. [PMID: 36718795 DOI: 10.1002/mds.29326] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/31/2022] [Accepted: 01/06/2023] [Indexed: 02/01/2023] Open
Abstract
Paroxysmal kinesigenic dyskinesia (PKD) is a movement disorder characterized by recurrent and transient episodes of involuntary movements, including dystonia, chorea, ballism, or a combination of these, which are typically triggered by sudden voluntary movement. Disturbance of the basal ganglia-thalamo-cortical circuit has long been considered the cause of involuntary movements. Impairment of the gating function of the basal ganglia can cause an aberrant output toward the thalamus, which in turn leads to excessive activation of the cerebral cortex. Structural and functional abnormalities in the basal ganglia, thalamus, and cortex and abnormal connections between these brain regions have been found in patients with PKD. Recent studies have highlighted the role of the cerebellum in PKD. Insufficient suppression from the cerebellar cortex to the deep cerebellar nuclei could lead to overexcitation of the thalamocortical pathway. Therefore, this literature review aims to provide a comprehensive overview of the current research progress to explore the neural circuits and pathogenesis of PKD and promote further understanding and outlook on the pathophysiological mechanism of movement disorders. © 2023 International Parkinson and Movement Disorder Society.
Collapse
Affiliation(s)
- Zi-Yi Li
- Department of Neurology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wo-Tu Tian
- Department of Neurology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Jun Huang
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li Cao
- Department of Neurology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| |
Collapse
|
17
|
El Atiallah I, Bonsi P, Tassone A, Martella G, Biella G, Castagno AN, Pisani A, Ponterio G. Synaptic Dysfunction in Dystonia: Update From Experimental Models. Curr Neuropharmacol 2023; 21:2310-2322. [PMID: 37464831 PMCID: PMC10556390 DOI: 10.2174/1570159x21666230718100156] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/05/2022] [Accepted: 12/12/2022] [Indexed: 07/20/2023] Open
Abstract
Dystonia, the third most common movement disorder, refers to a heterogeneous group of neurological diseases characterized by involuntary, sustained or intermittent muscle contractions resulting in repetitive twisting movements and abnormal postures. In the last few years, several studies on animal models helped expand our knowledge of the molecular mechanisms underlying dystonia. These findings have reinforced the notion that the synaptic alterations found mainly in the basal ganglia and cerebellum, including the abnormal neurotransmitters signalling, receptor trafficking and synaptic plasticity, are a common hallmark of different forms of dystonia. In this review, we focus on the major contribution provided by rodent models of DYT-TOR1A, DYT-THAP1, DYT-GNAL, DYT/ PARK-GCH1, DYT/PARK-TH and DYT-SGCE dystonia, which reveal that an abnormal motor network and synaptic dysfunction represent key elements in the pathophysiology of dystonia.
Collapse
Affiliation(s)
- Ilham El Atiallah
- Laboratory of Neurophysiology and Plasticity, IRCCS Fondazione Santa Lucia, Rome, Italy
- Department of System Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Paola Bonsi
- Laboratory of Neurophysiology and Plasticity, IRCCS Fondazione Santa Lucia, Rome, Italy
| | - Annalisa Tassone
- Laboratory of Neurophysiology and Plasticity, IRCCS Fondazione Santa Lucia, Rome, Italy
| | - Giuseppina Martella
- Laboratory of Neurophysiology and Plasticity, IRCCS Fondazione Santa Lucia, Rome, Italy
| | - Gerardo Biella
- Department of Biology and Biotechnology “L. Spallanzani”, University of Pavia, Pavia, Italy
| | - Antonio N. Castagno
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
- IRCCS Fondazione Mondino, Pavia, Italy
| | - Antonio Pisani
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
- IRCCS Fondazione Mondino, Pavia, Italy
| | - Giulia Ponterio
- Laboratory of Neurophysiology and Plasticity, IRCCS Fondazione Santa Lucia, Rome, Italy
| |
Collapse
|
18
|
Battistella G, Simonyan K. Clinical Implications of Dystonia as a Neural Network Disorder. ADVANCES IN NEUROBIOLOGY 2023; 31:223-240. [PMID: 37338705 DOI: 10.1007/978-3-031-26220-3_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Isolated dystonia is a neurological disorder of diverse etiology, multifactorial pathophysiology, and wide spectrum of clinical presentations. We review the recent neuroimaging advances that led to the conceptualization of dystonia as a neural network disorder and discuss how current knowledge is shaping the identification of biomarkers of dystonia and the development of novel pharmacological therapies.
Collapse
Affiliation(s)
- Giovanni Battistella
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Kristina Simonyan
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA.
- Department of Neurology, Massachusetts General Hospital, and Harvard Medical School, Boston, MA, USA.
| |
Collapse
|
19
|
Simonyan K, Ehrlich SK, Andersen R, Brumberg J, Guenther F, Hallett M, Howard MA, Millán JDR, Reilly RB, Schultz T, Valeriani D. Brain-Computer Interfaces for Treatment of Focal Dystonia. Mov Disord 2022; 37:1798-1802. [PMID: 35947366 PMCID: PMC9474652 DOI: 10.1002/mds.29178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/20/2022] [Accepted: 07/19/2022] [Indexed: 11/12/2022] Open
Abstract
Task-specificity in isolated focal dystonias is a powerful feature that may successfully be targeted with therapeutic brain-computer interfaces. While performing a symptomatic task, the patient actively modulates momentary brain activity (disorder signature) to match activity during an asymptomatic task (target signature), which is expected to translate into symptom reduction.
Collapse
Affiliation(s)
- Kristina Simonyan
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, Massachusetts, USA
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Stefan K. Ehrlich
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, Massachusetts, USA
| | - Richard Andersen
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, USA
| | - Jonathan Brumberg
- Department of Speech-Language-Hearing: Sciences & Disorders, University of Kansas, Lawrence, Kansas, USA
| | - Frank Guenther
- Department of Speech, Language, & Hearing Sciences, Boston University, Boston, Massachusetts, USA
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, USA
- Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Mark Hallett
- Human Motor Control Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Matthew A. Howard
- Department of Neurosurgery, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - José del R. Millán
- Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas, USA
- Department of Neurology, University of Texas at Austin, Austin, Texas, USA
| | - Richard B. Reilly
- Center for Biomedical Engineering, Trinity College Institute of Neuroscience, School of Medicine, School of Engineering, Trinity College Dublin and the University of Dublin, Dublin, Ireland
| | - Tanja Schultz
- Faculty 03 Mathematics and Computer Science, University of Bremen, Bremen, Germany
| | - Davide Valeriani
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
20
|
Matsumoto S, Koizumi H, Shimazu H, Kaji R, Goto S. A dual dopaminergic therapy with L-3,4-dihydroxyphenylalanine and chlorpromazine for the treatment of blepharospasm, a focal dystonia: Possible implications for striosomal D1 signaling. Front Neurol 2022. [DOI: 10.3389/fneur.2022.922333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Impairment of balanced activity between dopamine D1 and D2 receptor functions in the striatum, particularly in striatal functional subdivisions (i.e., striosome and matrix compartments), has been proposed to underlie dystonia genesis. This study was undertaken to examine the therapeutic effect of dual dopaminergic modulation with L-3,4-dihydroxyphenylalanine (L-DOPA) and chlorpromazine (CPZ) in patients with blepharospasm, a focal dystonia. For this purpose, Dopacol tablets™ (L-DOPA 50 mg plus carbidopa 5 mg) and Wintermin™ (CPZ phenolphthalinate 180 mg/g) were used. Clinical evaluations were performed before and after an 8-week drug treatment interval using the Visual Analog Scale (VAS), Blepharospasm Disability Index (BSDI), modified VAS (mVAS), and Jankovic Rating Scale (JRS). The data were analyzed using non-parametric statistics. Results showed that in patients (n = 7) with blepharospasm, dystonia symptoms were significantly alleviated by the administration of both Dopacol tablets™ (one tablet × 3/day) and CPZ (5 mg × 3/day), as determined using the VAS, BSDI, mVAS, and JRS. In contrast, there was no improvement of dystonia symptoms in patients (n = 7) who ingested Dopacol tablets™ (one tablet × 3/day) alone, nor in those (n = 7) who ingested CPZ (5 mg × 3/day) alone. Thus, dual pharmacotherapy with L-DOPA and CPZ can exert a therapeutic effect on blepharospasm, suggesting that dystonia symptoms can be attenuated through dopaminergic modulation with inducing an increase in striatal D1-signals. Since dopamine D1 receptors are heavily enriched in the striosome compartment in the “human” striatum, our results also suggest that striosomal loss of D1-signaling may be important in the pathogenesis of dystonia.
Collapse
|
21
|
Montemurro N, Aliaga N, Graff P, Escribano A, Lizana J. New Targets and New Technologies in the Treatment of Parkinson's Disease: A Narrative Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:8799. [PMID: 35886651 PMCID: PMC9321220 DOI: 10.3390/ijerph19148799] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/16/2022] [Accepted: 07/18/2022] [Indexed: 02/06/2023]
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disease, whose main neuropathological finding is pars compacta degeneration due to the accumulation of Lewy bodies and Lewy neurites, and subsequent dopamine depletion. This leads to an increase in the activity of the subthalamic nucleus (STN) and the internal globus pallidus (GPi). Understanding functional anatomy is the key to understanding and developing new targets and new technologies that could potentially improve motor and non-motor symptoms in PD. Currently, the classical targets are insufficient to improve the entire wide spectrum of symptoms in PD (especially non-dopaminergic ones) and none are free of the side effects which are not only associated with the procedure, but with the targets themselves. The objective of this narrative review is to show new targets in DBS surgery as well as new technologies that are under study and have shown promising results to date. The aim is to give an overview of these new targets, as well as their limitations, and describe the current studies in this research field in order to review ongoing research that will probably become effective and routine treatments for PD in the near future.
Collapse
Affiliation(s)
- Nicola Montemurro
- Department of Neurosurgery, Azienda Ospedaliera Universitaria Pisana (AOUP), University of Pisa, 56100 Pisa, Italy
| | - Nelida Aliaga
- Medicine Faculty, Austral University, Buenos Aires B1406, Argentina; (N.A.); (A.E.)
| | - Pablo Graff
- Functional Neurosurgery Program, Department of Neurosurgery, San Miguel Arcángel Hospital, Buenos Aires B1406, Argentina;
| | - Amanda Escribano
- Medicine Faculty, Austral University, Buenos Aires B1406, Argentina; (N.A.); (A.E.)
| | - Jafeth Lizana
- Department of Neurosurgery, Hospital Nacional Guillermo Almenara Irigoyen, Lima 07035, Peru;
- Medicine Faculty, Universidad Nacional Mayor de San Marcos, Lima 07035, Peru
| |
Collapse
|
22
|
Yin B, Shi Z, Wang Y, Meck WH. Oscillation/Coincidence-Detection Models of Reward-Related Timing in Corticostriatal Circuits. TIMING & TIME PERCEPTION 2022. [DOI: 10.1163/22134468-bja10057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
The major tenets of beat-frequency/coincidence-detection models of reward-related timing are reviewed in light of recent behavioral and neurobiological findings. This includes the emphasis on a core timing network embedded in the motor system that is comprised of a corticothalamic-basal ganglia circuit. Therein, a central hub provides timing pulses (i.e., predictive signals) to the entire brain, including a set of distributed satellite regions in the cerebellum, cortex, amygdala, and hippocampus that are selectively engaged in timing in a manner that is more dependent upon the specific sensory, behavioral, and contextual requirements of the task. Oscillation/coincidence-detection models also emphasize the importance of a tuned ‘perception’ learning and memory system whereby target durations are detected by striatal networks of medium spiny neurons (MSNs) through the coincidental activation of different neural populations, typically utilizing patterns of oscillatory input from the cortex and thalamus or derivations thereof (e.g., population coding) as a time base. The measure of success of beat-frequency/coincidence-detection accounts, such as the Striatal Beat-Frequency model of reward-related timing (SBF), is their ability to accommodate new experimental findings while maintaining their original framework, thereby making testable experimental predictions concerning diagnosis and treatment of issues related to a variety of dopamine-dependent basal ganglia disorders, including Huntington’s and Parkinson’s disease.
Collapse
Affiliation(s)
- Bin Yin
- Department of Psychology and Neuroscience, Duke University, Durham, NC 27708, USA
- School of Psychology, Fujian Normal University, Fuzhou, 350117, Fujian, China
| | - Zhuanghua Shi
- Department of Psychology, Ludwig Maximilian University of Munich, 80802 Munich, Germany
| | - Yaxin Wang
- School of Psychology, Fujian Normal University, Fuzhou, 350117, Fujian, China
| | - Warren H. Meck
- Department of Psychology and Neuroscience, Duke University, Durham, NC 27708, USA
| |
Collapse
|
23
|
Medina CA, Vargas E, Munger SJ, Miller JE. Vocal changes in a zebra finch model of Parkinson's disease characterized by alpha-synuclein overexpression in the song-dedicated anterior forebrain pathway. PLoS One 2022; 17:e0265604. [PMID: 35507553 PMCID: PMC9067653 DOI: 10.1371/journal.pone.0265604] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 03/06/2022] [Indexed: 11/18/2022] Open
Abstract
Deterioration in the quality of a person's voice and speech is an early marker of Parkinson's disease (PD). In humans, the neural circuit that supports vocal motor control consists of a cortico-basal ganglia-thalamo-cortico loop. The basal ganglia regions, striatum and globus pallidus, in this loop play a role in modulating the acoustic features of vocal behavior such as loudness, pitch, and articulatory rate. In PD, this area is implicated in pathogenesis. In animal models of PD, the accumulation of toxic aggregates containing the neuronal protein alpha-synuclein (αsyn) in the midbrain and striatum result in limb and vocal motor impairments. It has been challenging to study vocal impairments given the lack of well-defined cortico-basal ganglia circuitry for vocalization in rodent models. Furthermore, whether deterioration of voice quality early in PD is a direct result of αsyn-induced neuropathology is not yet known. Here, we take advantage of the well-characterized vocal circuits of the adult male zebra finch songbird to experimentally target a song-dedicated pathway, the anterior forebrain pathway, using an adeno-associated virus expressing the human wild-type αsyn gene, SNCA. We found that overexpression of αsyn in this pathway coincides with higher levels of insoluble, monomeric αsyn compared to control finches. Impairments in song production were also detected along with shorter and poorer quality syllables, which are the most basic unit of song. These vocal changes are similar to the vocal abnormalities observed in individuals with PD.
Collapse
Affiliation(s)
- Cesar A. Medina
- Graduate Interdisciplinary Program in Neuroscience, University of Arizona, Tucson, Arizona, United State of America
- Department of Neuroscience, University of Arizona, Tucson, Arizona, United States of America
| | - Eddie Vargas
- Department of Neuroscience, University of Arizona, Tucson, Arizona, United States of America
| | - Stephanie J. Munger
- Department of Neuroscience, University of Arizona, Tucson, Arizona, United States of America
| | - Julie E. Miller
- Graduate Interdisciplinary Program in Neuroscience, University of Arizona, Tucson, Arizona, United State of America
- Department of Neuroscience, University of Arizona, Tucson, Arizona, United States of America
- Department of Speech, Language, and Hearing Sciences, University of Arizona, Tucson, Arizona, United States of America
- Department of Neurology, University of Arizona, Tucson, Arizona, United States of America
- BIO5 Institute, University of Arizona, Tucson, Arizona, United States of America
| |
Collapse
|
24
|
Sussman BL, Wyckoff SN, Heim J, Wilfong AA, Adelson PD, Kruer MC, Gonzalez MJ, Boerwinkle VL. Is Resting State Functional MRI Effective Connectivity in Movement Disorders Helpful? A Focused Review Across Lifespan and Disease. Front Neurol 2022; 13:847834. [PMID: 35493815 PMCID: PMC9046695 DOI: 10.3389/fneur.2022.847834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 03/23/2022] [Indexed: 11/20/2022] Open
Abstract
In the evolving modern era of neuromodulation for movement disorders in adults and children, much progress has been made recently characterizing the human motor network (MN) with potentially important treatment implications. Herein is a focused review of relevant resting state fMRI functional and effective connectivity of the human motor network across the lifespan in health and disease. The goal is to examine how the transition from functional connectivity to dynamic effective connectivity may be especially informative of network-targeted movement disorder therapies, with hopeful implications for children.
Collapse
Affiliation(s)
- Bethany L. Sussman
- Division of Neuroscience, Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
- *Correspondence: Bethany L. Sussman
| | - Sarah N. Wyckoff
- Division of Neuroscience, Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
- Department of Research, Phoenix Children's Hospital, Phoenix, AZ, United States
| | - Jennifer Heim
- Division of Pediatric Neurology, Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
| | - Angus A. Wilfong
- Division of Pediatric Neurology, Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
| | - P. David Adelson
- Division of Pediatric Neurosurgery, Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
| | - Michael C. Kruer
- Division of Pediatric Neurology, Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
- Departments of Child Health, Neurology, Genetics and Cellular & Molecular Medicine, University of Arizona College of Medicine – Phoenix, Phoenix, AZ, United States
| | | | - Varina L. Boerwinkle
- Division of Pediatric Neurology, Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
| |
Collapse
|
25
|
Wu Y, Wang T, Ding Q, Li H, Wu Y, Li D, Sun B, Pan Y. Cortical and Subcortical Structural Abnormalities in Patients With Idiopathic Cervical and Generalized Dystonia. FRONTIERS IN NEUROIMAGING 2022; 1:807850. [PMID: 37555168 PMCID: PMC10406292 DOI: 10.3389/fnimg.2022.807850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 02/03/2022] [Indexed: 08/10/2023]
Abstract
OBJECTIVES In this study, we sought to investigate structural imaging alterations of patients with idiopathic dystonia at the cortical and subcortical levels. The common and specific changes in two subtypes of dystonia, cervical dystonia (CD) and generalized dystonia (GD), were intended to be explored. Additionally, we sought to identify the morphometric measurements which might be related to patients' clinical characteristics, thus providing more clues of specific brain regions involved in the mechanism of idiopathic dystonia. METHODS 3D T1-weighted MRI scans were acquired from 56 patients with idiopathic dystonia and 30 healthy controls (HC). Patients were classified as CD or GD, according to the distinct symptom distributions. Cortical thickness (CT) of 30 CD and 26 GD were estimated and compared to HCs using Computational Anatomy Toolbox (CAT12), while volumes of subcortical structures and their shape alterations (29 CD, 25 GD, and 27 HCs) were analyzed via FSL software. Further, we applied correlation analyses between the above imaging measurements with significant differences and patients' clinical characteristics. RESULTS The results of comparisons between the two patient groups and HCs were highly consistent, demonstrating increased CT of bilateral postcentral, superiorparietal, superiorfrontal/rostralmiddlefrontal, occipital gyrus, etc., and decreased CT of bilateral cingulate, insula, entorhinal, and fusiform gyrus (PFWE < 0.005 at the cluster level). In CD, trends of negative correlations were found between disease severity and CT alterations mostly located in pre/postcentral, rostralmiddlefrontal, superiorparietal, and supramarginal regions. Besides, volumes of bilateral putamen, caudate, and thalamus were significantly reduced in both patient groups, while pallidum volume reduction was also presented in GD compared to HCs. Caudate volume reduction had a trend of correlation to increasing disease severity in GD. Last, shape analysis directly demonstrated regional surface alterations in bilateral thalamus and caudate, where the atrophy located in the head of caudate had a trend of correlation to earlier ages of onset in GD. CONCLUSIONS Our study demonstrates wide-spread morphometric changes of CT, subcortical volumes, and shapes in idiopathic dystonia. CD and GD presented similar patterns of morphometric abnormalities, indicating shared underlying mechanisms in two different disease forms. Especially, the clinical associations of CT of multiple brain regions with disease severity, and altered volume/shape of caudate with disease severity/age of onset separately in CD and GD might serve as potential biomarkers for further disease exploration.
Collapse
Affiliation(s)
- Yunhao Wu
- Department of Neurosurgery, Center for Functional Neurosurgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tao Wang
- Department of Neurosurgery, Center for Functional Neurosurgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qiong Ding
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China
| | - Hongxia Li
- Department of Neurology, Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiwen Wu
- Department of Neurology, Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dianyou Li
- Department of Neurosurgery, Center for Functional Neurosurgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bomin Sun
- Department of Neurosurgery, Center for Functional Neurosurgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yixin Pan
- Department of Neurosurgery, Center for Functional Neurosurgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| |
Collapse
|
26
|
Patel RR, Zauber SE, Yadav AP, Witt TC, Halum S, Gupta K. Globus Pallidus Interna and Ventral Intermediate Nucleus of the Thalamus Deep Brain Stimulation for Adductor Laryngeal Dystonia: a Case Report of Blinded Analyses of Objective Voice Outcomes in 2 Patients. Neurosurgery 2022; 90:457-463. [PMID: 35138294 DOI: 10.1227/neu.0000000000001851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 11/08/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Adductor laryngeal dystonia (ADLD) is a substantially debilitating focal progressive neurological voice disorder. Current standard of care is symptomatic treatment with repeated injections of botulinum toxin into specific intrinsic laryngeal muscles with extremely variable and temporary benefits. We report the use of bilateral deep brain stimulation (DBS) of globus pallidus (GPi) for long-term improvement of ADLD voice symptoms. OBJECTIVE To investigate the effects of bilateral DBS of the GPi and ventral intermediate nucleus (VIM) of the thalamus on vocal function in 2 patients with ADLD associated with voice and hand tremor. METHODS Blinded objective and quantitative analyses of voice were conducted before and after treatment in 2 female patients (70 and 69 years). Paired t-tests were conducted to compare voice measurements pre-GPi and post-GPi and VIM-DBS. A 2-way analysis of variance was conducted to determine the interaction between target (GPi/VIM) and time (pre/post) for each voice measure. RESULTS Although the follow-up period differed between patients, the GPi-DBS implanted patient had notable improvement in vowel voicing (%), extent of tremor intensity (%), and overall speech intelligibility (%), compared with preoperative status. GPi-DBS also resulted in significant improvement in cepstral peak prominence (dB). VIM-DBS resulted in a significantly greater change in the tremor rate (Hz). CONCLUSION Changes in phonatory function provide preliminary support for the use of bilateral GPi-DBS for treatment of ADLD and bilateral VIM-DBS for vocal tremor predominant ADLD. Future studies with larger sample sizes and standardized follow-up periods are needed to better assess the role of DBS for ADLD.
Collapse
Affiliation(s)
- Rita R Patel
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine/Indiana University Bloomington, Indianapolis, Indiana, USA
| | - S Elizabeth Zauber
- Department of Neurology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Amol P Yadav
- Department of Neurosurgery, Indiana University School of Medicine, Indianapolis, Indiana, USA.,Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Thomas C Witt
- Department of Neurosurgery, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Stacey Halum
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine/Indiana University Bloomington, Indianapolis, Indiana, USA
| | - Kunal Gupta
- Department of Neurosurgery, Indiana University School of Medicine, Indianapolis, Indiana, USA.,Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana, USA
| |
Collapse
|
27
|
Scarduzio M, Hess EJ, Standaert DG, Eskow Jaunarajs KL. Striatal synaptic dysfunction in dystonia and levodopa-induced dyskinesia. Neurobiol Dis 2022; 166:105650. [DOI: 10.1016/j.nbd.2022.105650] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 01/22/2022] [Accepted: 01/24/2022] [Indexed: 12/16/2022] Open
|
28
|
Burbaud P, Courtin E, Ribot B, Guehl D. Basal ganglia: From the bench to the bed. Eur J Paediatr Neurol 2022; 36:99-106. [PMID: 34953339 DOI: 10.1016/j.ejpn.2021.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 12/01/2021] [Indexed: 11/24/2022]
Abstract
The basal ganglia (BG) encompass a set of archaic structures of the vertebrate brain that have evolved relatively little during the phylogenetic process. From an anatomic point of view, they are widely distributed throughout brain from the telencephalon to the mesencephalon. The fact that they have been preserved through evolution suggests that they may play a critical role in behavioral monitoring. Indeed, a line of evidence suggests that they are involved in the building of behavioral routines and habits that drive most of our activities in everyday life. In this article, we first examine the organization and physiology of the basal ganglia to explain their function in the control of behavior. Then, we show how disruption of the putamen, and to a lesser extent of the cerebellum, might lead to various dystonic syndromes that frequently arise during childhood.
Collapse
Affiliation(s)
- P Burbaud
- Centre Hospitalier Universitaire de Bordeaux, Institut des Maladies Neurodégénératives, CNRS, University of Bordeaux, France.
| | - E Courtin
- Centre Hospitalier Universitaire de Bordeaux, Institut des Maladies Neurodégénératives, CNRS, University of Bordeaux, France
| | - B Ribot
- Centre Hospitalier Universitaire de Bordeaux, Institut des Maladies Neurodégénératives, CNRS, University of Bordeaux, France
| | - D Guehl
- Centre Hospitalier Universitaire de Bordeaux, Institut des Maladies Neurodégénératives, CNRS, University of Bordeaux, France
| |
Collapse
|
29
|
Grimm C, Frässle S, Steger C, von Ziegler L, Sturman O, Shemesh N, Peleg-Raibstein D, Burdakov D, Bohacek J, Stephan KE, Razansky D, Wenderoth N, Zerbi V. Optogenetic activation of striatal D1R and D2R cells differentially engages downstream connected areas beyond the basal ganglia. Cell Rep 2021; 37:110161. [PMID: 34965430 DOI: 10.1016/j.celrep.2021.110161] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 10/20/2021] [Accepted: 12/01/2021] [Indexed: 11/16/2022] Open
Abstract
The basal ganglia (BG) are a group of subcortical nuclei responsible for motor and executive function. Central to BG function are striatal cells expressing D1 (D1R) and D2 (D2R) dopamine receptors. D1R and D2R cells are considered functional antagonists that facilitate voluntary movements and inhibit competing motor patterns, respectively. However, whether they maintain a uniform function across the striatum and what influence they exert outside the BG is unclear. Here, we address these questions by combining optogenetic activation of D1R and D2R cells in the mouse ventrolateral caudoputamen with fMRI. Striatal D1R/D2R stimulation evokes distinct activity within the BG-thalamocortical network and differentially engages cerebellar and prefrontal regions. Computational modeling of effective connectivity confirms that changes in D1R/D2R output drive functional relationships between these regions. Our results suggest a complex functional organization of striatal D1R/D2R cells and hint toward an interconnected fronto-BG-cerebellar network modulated by striatal D1R and D2R cells.
Collapse
Affiliation(s)
- Christina Grimm
- Neural Control of Movement Lab, Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland; Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland
| | - Stefan Frässle
- Translational Neuromodeling Unit (TNU), Institute for Biomedical Engineering, University of Zürich and ETH Zürich, Zürich, Switzerland
| | - Céline Steger
- Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland; Center for MR Research, University Children's Hospital Zurich, Zürich, Switzerland
| | - Lukas von Ziegler
- Laboratory of Molecular and Behavioral Neuroscience, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland; Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland
| | - Oliver Sturman
- Laboratory of Molecular and Behavioral Neuroscience, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland; Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland
| | - Noam Shemesh
- Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Daria Peleg-Raibstein
- Laboratory of Neurobehavioral Dynamics, Department of Health Sciences and Technology, Institute for Neuroscience, ETH Zürich, Zürich, Switzerland; Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology, Faculty of Medicine, University of Zurich, Zürich, Switzerland
| | - Denis Burdakov
- Laboratory of Neurobehavioral Dynamics, Department of Health Sciences and Technology, Institute for Neuroscience, ETH Zürich, Zürich, Switzerland; Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology, Faculty of Medicine, University of Zurich, Zürich, Switzerland; Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland
| | - Johannes Bohacek
- Laboratory of Molecular and Behavioral Neuroscience, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland; Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland
| | - Klaas Enno Stephan
- Translational Neuromodeling Unit (TNU), Institute for Biomedical Engineering, University of Zürich and ETH Zürich, Zürich, Switzerland
| | - Daniel Razansky
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zürich, Zürich, Switzerland; Institute of Biological and Medical Imaging (IBMI), Technical University of Munich and Helmholtz Center Munich, Munich, Germany; Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland
| | - Nicole Wenderoth
- Neural Control of Movement Lab, Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland; Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland
| | - Valerio Zerbi
- Neural Control of Movement Lab, Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland; Neuroscience Center Zurich, ETH Zürich and University of Zurich, Zürich, Switzerland.
| |
Collapse
|
30
|
Zeuner KE, Knutzen A, Granert O, Trampenau L, Baumann A, Wolff S, Jansen O, van Eimeren T, Kuhtz-Buschbeck JP. Never too little: Grip and lift forces following probabilistic weight cues in patients with writer's cramp. Clin Neurophysiol 2021; 132:2937-2947. [PMID: 34715418 DOI: 10.1016/j.clinph.2021.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 08/03/2021] [Accepted: 09/05/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Planning of voluntary object-related movements requires the estimation of the most probable object properties. We investigated how 14 writer's cramp (WC) patients compared to 14 controls use probabilistic weight cues in a serial grip-lift task. METHODS In every grip-lift trial, an object of either light, medium or heavy weight had to be grasped and lifted after a visual cue gave a probabilistic prediction of the object weights (e.g. 32.5% light, 67.5% medium, 0 % heavy). We determined peak (1) grip force GF, (2) load force LF, (3) grip force rate GFR, (4) load force rate LFR, while we registered brain activity with functional magnetic resonance imaging. RESULTS In both groups, GFR, LFR and GF increased when a higher probability of heavy weights was announced. When a higher probability of light weights was indicated, controls reduced GFR, LFR and GF, while WC patients did not downscale their forces. There were no inter-group differences in blood oxygenation level dependent activation. CONCLUSIONS WC patients could not utilize the decision range in motor planning and adjust their force in a probabilistic cued fine motor task. SIGNIFICANCE The results support the pathophysiological model of a hyperfunctional dopamine dependent direct basal ganglia pathway in WC.
Collapse
Affiliation(s)
| | - Arne Knutzen
- Department of Neurology, Kiel University, Germany
| | | | | | | | - Stephan Wolff
- Department of Radiology and Neuroradiology, Kiel University, Germany
| | - Olav Jansen
- Department of Radiology and Neuroradiology, Kiel University, Germany
| | - Thilo van Eimeren
- Department of Nuclear Medicine, University Hospital Cologne, Germany
| | | |
Collapse
|
31
|
Williams L, Butler JS, O'Riordan S, Skeehan S, Collins C, Hutchinson M. Response to "isolated head tremor: A DAT SPECT and somatosensory temporal discrimination study.". Parkinsonism Relat Disord 2021; 87:166-167. [PMID: 34090789 DOI: 10.1016/j.parkreldis.2021.05.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 05/23/2021] [Indexed: 10/21/2022]
Abstract
In response to Ferrazano and colleagues' observation of normal DAT binding in patients with isolated head tremor but with abnormal STDT, we report normal 123-IBZM SPECT in a cohort of patients with adult-onset idiopathic focal dystonia with cervical dystonia and their unaffected first-degree relatives both with normal and abnormal TDTs. We discuss molecular imaging findings in dystonia.
Collapse
Affiliation(s)
- L Williams
- Department of Neurology, St. Vincent's University Hospital, Dublin, Ireland.
| | - J S Butler
- School of Mathematical Sciences, Technological Universtiy Dublin, Dublin, Ireland
| | - S O'Riordan
- Department of Neurology, St. Vincent's University Hospital, Dublin, Ireland
| | - S Skeehan
- Department of Radiology, St. Vincent's University Hospital, Dublin, Ireland
| | - C Collins
- Department of Radiology, St. Vincent's University Hospital, Dublin, Ireland
| | - M Hutchinson
- Department of Neurology, St. Vincent's University Hospital, Dublin, Ireland
| |
Collapse
|
32
|
Zeugin D, Ionta S. Anatomo-Functional Origins of the Cortical Silent Period: Spotlight on the Basal Ganglia. Brain Sci 2021; 11:705. [PMID: 34071742 PMCID: PMC8227635 DOI: 10.3390/brainsci11060705] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 05/17/2021] [Accepted: 05/25/2021] [Indexed: 02/06/2023] Open
Abstract
The so-called cortical silent period (CSP) refers to the temporary interruption of electromyographic signal from a muscle following a motor-evoked potential (MEP) triggered by transcranial magnetic stimulation (TMS) over the primary motor cortex (M1). The neurophysiological origins of the CSP are debated. Previous evidence suggests that both spinal and cortical mechanisms may account for the duration of the CSP. However, contextual factors such as cortical fatigue, experimental procedures, attentional load, as well as neuropathology can also influence the CSP duration. The present paper summarizes the most relevant evidence on the mechanisms underlying the duration of the CSP, with a particular focus on the central role of the basal ganglia in the "direct" (excitatory), "indirect" (inhibitory), and "hyperdirect" cortico-subcortical pathways to manage cortical motor inhibition. We propose new methods of interpretation of the CSP related, at least partially, to the inhibitory hyperdirect and indirect pathways in the basal ganglia. This view may help to explain the respective shortening and lengthening of the CSP in various neurological disorders. Shedding light on the complexity of the CSP's origins, the present review aims at constituting a reference for future work in fundamental research, technological development, and clinical settings.
Collapse
Affiliation(s)
| | - Silvio Ionta
- Sensory-Motor Laboratory (SeMoLa), Jules-Gonin Eye Hospital/Fondation Asile des Aveugles, Department of Ophthalmology, University of Lausanne, 1002 Lausanne, Switzerland
| |
Collapse
|
33
|
Ganguly J, Kulshreshtha D, Almotiri M, Jog M. Muscle Tone Physiology and Abnormalities. Toxins (Basel) 2021; 13:toxins13040282. [PMID: 33923397 PMCID: PMC8071570 DOI: 10.3390/toxins13040282] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/14/2021] [Accepted: 04/14/2021] [Indexed: 01/10/2023] Open
Abstract
The simple definition of tone as the resistance to passive stretch is physiologically a complex interlaced network encompassing neural circuits in the brain, spinal cord, and muscle spindle. Disorders of muscle tone can arise from dysfunction in these pathways and manifest as hypertonia or hypotonia. The loss of supraspinal control mechanisms gives rise to hypertonia, resulting in spasticity or rigidity. On the other hand, dystonia and paratonia also manifest as abnormalities of muscle tone, but arise more due to the network dysfunction between the basal ganglia and the thalamo-cerebello-cortical connections. In this review, we have discussed the normal homeostatic mechanisms maintaining tone and the pathophysiology of spasticity and rigidity with its anatomical correlates. Thereafter, we have also highlighted the phenomenon of network dysfunction, cortical disinhibition, and neuroplastic alterations giving rise to dystonia and paratonia.
Collapse
|
34
|
Simonyan K, Barkmeier-Kraemer J, Blitzer A, Hallett M, Houde JF, Jacobson Kimberley T, Ozelius LJ, Pitman MJ, Richardson RM, Sharma N, Tanner K. Laryngeal Dystonia: Multidisciplinary Update on Terminology, Pathophysiology, and Research Priorities. Neurology 2021; 96:989-1001. [PMID: 33858994 DOI: 10.1212/wnl.0000000000011922] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 02/17/2021] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE To delineate research priorities for improving clinical management of laryngeal dystonia, the NIH convened a multidisciplinary panel of experts for a 1-day workshop to examine the current progress in understanding its etiopathophysiology and clinical care. METHODS The participants reviewed the current terminology of disorder and discussed advances in understanding its pathophysiology since a similar workshop was held in 2005. Clinical and research gaps were identified, and recommendations for future directions were delineated. RESULTS The panel unanimously agreed to adopt the term "laryngeal dystonia" instead of "spasmodic dysphonia" to reflect the current progress in characterizations of this disorder. Laryngeal dystonia was recognized as a multifactorial, phenotypically heterogeneous form of isolated dystonia. Its etiology remains unknown, whereas the pathophysiology likely involves large-scale functional and structural brain network disorganization. Current challenges include the lack of clinically validated diagnostic markers and outcome measures and the paucity of therapies that address the disorder pathophysiology. CONCLUSION Research priorities should be guided by challenges in clinical management of laryngeal dystonia. Identification of disorder-specific biomarkers would allow the development of novel diagnostic tools and unified measures of treatment outcome. Elucidation of the critical nodes within neural networks that cause or modulate symptoms would allow the development of targeted therapies that address the underlying pathophysiology. Given the rarity of laryngeal dystonia, future rapid research progress may be facilitated by multicenter, national and international collaborations.
Collapse
Affiliation(s)
- Kristina Simonyan
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT.
| | - Julie Barkmeier-Kraemer
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - Andrew Blitzer
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - Mark Hallett
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - John F Houde
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - Teresa Jacobson Kimberley
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - Laurie J Ozelius
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - Michael J Pitman
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - Robert Mark Richardson
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - Nutan Sharma
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | - Kristine Tanner
- From the Department of Otolaryngology-Head and Neck Surgery (K.S.), Harvard Medical School and Massachusetts Eye and Ear, Boston, MA, Department of Neurology (K.S., L.J.O., N.S.), Massachusetts General Hospital, Boston, MA; Division of Otolaryngology (J.B.-K.), University of Utah, Salt Lake City, UT; New York Center for Voice and Swallowing Disorders and Department of Neurology (A.B.), Icahn School of Medicine at Mount Sinai, New York, NY; Human Motor Control Section (M.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Department of Otolaryngology-Head and Neck Surgery (J.H.), University of California San Francisco, San Francisco, CA; School of Rehabilitation and Health Sciences (T.J.K.), Massachusetts General Hospital Institute of Health Professions, Boston, MA; Department of Otolaryngology-Head and Neck Surgery (M.J.P.), Columbia University Irving Medical Center, New York, NY; Department of Neurosurgery (R.M.R.), Massachusetts General Hospital, Boston, MA; and Department of Communication Disorders (K.T.), Brigham Young University, Provo, UT
| | | |
Collapse
|
35
|
Yamahata H, Horisawa S, Hodotsuka K, Kawamata T, Taira T. Long-Term Successful Outcome of Dystonic Head Tremor after Bilateral Deep Brain Stimulation of the Ventral Intermediate and Ventro-Oral Internus Nuclei: A Case Report and Literature Review of Dystonic Head Tremor. Stereotact Funct Neurosurg 2021; 99:107-112. [PMID: 33401264 DOI: 10.1159/000510593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 07/30/2020] [Indexed: 11/19/2022]
Abstract
Head tremor in patients with dystonia is referred to as dystonic tremor. During surgical treatment, numerous targets may be selected, including the internal segment of the globus pallidus and the ventral intermediate (Vim) nucleus; however, there is no consensus concerning the most effective treatment target. We report herein a case of dystonic head tremor in which improvement persisted for 5 years after deep brain stimulation (DBS) of the bilateral thalamic Vim and ventro-oral internus (Voi) nuclei. The patient, a 67-year-old woman, has a horizontal head tremor associated with cervical dystonia that had been resistant to drug treatment over 3 years. Immediately following surgery, dystonia and tremor symptoms had completely improved. Voice volume declined and dysarthria occurred but improved upon adjusting the stimulation conditions. Over 5 years, both head tremor and cervical dystonia have been completely controlled, and no other obvious complications have been observed. As the Voi nucleus receives pallidothalamic projections involved in dystonia and the Vim nucleus receives cerebellothalamic projections involved in tremors, stimulating these 2 nuclei with the same electrode appears reasonable in the treatment of dystonic tremor. This case suggests that Vim-Voi DBS may be effective for treating dystonic head tremor.
Collapse
Affiliation(s)
- Hayato Yamahata
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University, Tokyo, Japan
| | - Shiro Horisawa
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University, Tokyo, Japan,
| | - Kenichi Hodotsuka
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University, Tokyo, Japan
| | - Takakazu Kawamata
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University, Tokyo, Japan
| | - Takaomi Taira
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University, Tokyo, Japan
| |
Collapse
|
36
|
Shimizu T, Maruo T, Miura S, Kimoto Y, Ushio Y, Goto S, Kishima H. Burst Spinal Cord Stimulation for the Treatment of Cervical Dystonia with Intractable Pain: A Pilot Study. Brain Sci 2020; 10:brainsci10110827. [PMID: 33171779 PMCID: PMC7694959 DOI: 10.3390/brainsci10110827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/31/2020] [Accepted: 11/03/2020] [Indexed: 12/02/2022] Open
Abstract
Pain is the most common and disabling non-motor symptom in patients with cervical dystonia. Here, we report four patients with painful cervical dystonia in whom burst spinal cord stimulation (SCS) in the cervical region produced sustained and significant improvements in both dystonic pain and motor symptoms. Further studies need to be performed to investigate the clinical efficacy of burst SCS for patients with cervical dystonia.
Collapse
Affiliation(s)
- Takeshi Shimizu
- Department of Neurosurgery, Parkinson’s Disease Research Center, KKR Otemae Hospital, Osaka 540-0008, Japan; (T.S.); (Y.U.)
- Department of Neurosurgery, Kansai Rosai Hospital, Hyogo 660-8511, Japan
| | - Tomoyuki Maruo
- Department of Neurosurgery, Parkinson’s Disease Research Center, KKR Otemae Hospital, Osaka 540-0008, Japan; (T.S.); (Y.U.)
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan; (S.M.); (Y.K.); (H.K.)
- Correspondence: ; Tel.: +81-6-6942-0484
| | - Shimpei Miura
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan; (S.M.); (Y.K.); (H.K.)
| | - Yuki Kimoto
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan; (S.M.); (Y.K.); (H.K.)
| | - Yukitaka Ushio
- Department of Neurosurgery, Parkinson’s Disease Research Center, KKR Otemae Hospital, Osaka 540-0008, Japan; (T.S.); (Y.U.)
| | - Satoshi Goto
- Department of Neurodegenerative Disorders Research, Institute of Biomedical Sciences, Graduate School of Medical Sciences, Tokushima University, Tokushima 770-8503, Japan;
| | - Haruhiko Kishima
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan; (S.M.); (Y.K.); (H.K.)
| |
Collapse
|
37
|
A microstructural neural network biomarker for dystonia diagnosis identified by a DystoniaNet deep learning platform. Proc Natl Acad Sci U S A 2020; 117:26398-26405. [PMID: 33004625 PMCID: PMC7586425 DOI: 10.1073/pnas.2009165117] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
This research identified a microstructural neural network biomarker for objective and accurate diagnosis of isolated dystonia based on the disorder pathophysiology using an advanced deep learning algorithm, DystoniaNet, and raw structural brain images of large cohorts of patients with isolated focal dystonia and healthy controls. DystoniaNet significantly outperformed shallow machine-learning pipelines and substantially exceeded the current agreement rates between clinicians, reaching an overall accuracy of 98.8% in diagnosing different forms of isolated focal dystonia. These results suggest that DystoniaNet could serve as an objective, robust, and generalizable algorithmic platform of dystonia diagnosis for enhanced clinical decision-making. Implementation of the identified biomarker for objective and accurate diagnosis of dystonia may be transformative for clinical management of this disorder. Isolated dystonia is a neurological disorder of heterogeneous pathophysiology, which causes involuntary muscle contractions leading to abnormal movements and postures. Its diagnosis is remarkably challenging due to the absence of a biomarker or gold standard diagnostic test. This leads to a low agreement between clinicians, with up to 50% of cases being misdiagnosed and diagnostic delays extending up to 10.1 y. We developed a deep learning algorithmic platform, DystoniaNet, to automatically identify and validate a microstructural neural network biomarker for dystonia diagnosis from raw structural brain MRIs of 612 subjects, including 392 patients with three different forms of isolated focal dystonia and 220 healthy controls. DystoniaNet identified clusters in corpus callosum, anterior and posterior thalamic radiations, inferior fronto-occipital fasciculus, and inferior temporal and superior orbital gyri as the biomarker components. These regions are known to contribute to abnormal interhemispheric information transfer, heteromodal sensorimotor processing, and executive control of motor commands in dystonia pathophysiology. The DystoniaNet-based biomarker showed an overall accuracy of 98.8% in diagnosing dystonia, with a referral of 3.5% of cases due to diagnostic uncertainty. The diagnostic decision by DystoniaNet was computed in 0.36 s per subject. DystoniaNet significantly outperformed shallow machine-learning algorithms in benchmark comparisons, showing nearly a 20% increase in its diagnostic performance. Importantly, the microstructural neural network biomarker and its DystoniaNet platform showed substantial improvement over the current 34% agreement on dystonia diagnosis between clinicians. The translational potential of this biomarker is in its highly accurate, interpretable, and generalizable performance for enhanced clinical decision-making.
Collapse
|
38
|
Tomić A, Agosta F, Sarasso E, Svetel M, Kresojević N, Fontana A, Canu E, Petrović I, Kostić VS, Filippi M. Brain Structural Changes in Focal Dystonia—What About Task Specificity? A Multimodal
MRI
Study. Mov Disord 2020; 36:196-205. [DOI: 10.1002/mds.28304] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/31/2020] [Accepted: 09/03/2020] [Indexed: 01/26/2023] Open
Affiliation(s)
- Aleksandra Tomić
- Clinic of Neurology, Faculty of Medicine University of Belgrade Belgrade Serbia
| | - Federica Agosta
- Neuroimaging Research Unit, Institute of Experimental Neurology, Division of Neuroscience IRCCS San Raffaele Scientific Institute Milan Italy
- Vita‐Salute San Raffaele University Milan Italy
| | - Elisabetta Sarasso
- Neuroimaging Research Unit, Institute of Experimental Neurology, Division of Neuroscience IRCCS San Raffaele Scientific Institute Milan Italy
- Vita‐Salute San Raffaele University Milan Italy
| | - Marina Svetel
- Clinic of Neurology, Faculty of Medicine University of Belgrade Belgrade Serbia
| | - Nikola Kresojević
- Clinic of Neurology, Faculty of Medicine University of Belgrade Belgrade Serbia
| | - Andrea Fontana
- Unit of Biostatistics, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo Foggia Italy
| | - Elisa Canu
- Neuroimaging Research Unit, Institute of Experimental Neurology, Division of Neuroscience IRCCS San Raffaele Scientific Institute Milan Italy
| | - Igor Petrović
- Clinic of Neurology, Faculty of Medicine University of Belgrade Belgrade Serbia
| | - Vladimir S. Kostić
- Clinic of Neurology, Faculty of Medicine University of Belgrade Belgrade Serbia
| | - Massimo Filippi
- Neuroimaging Research Unit, Institute of Experimental Neurology, Division of Neuroscience IRCCS San Raffaele Scientific Institute Milan Italy
- Vita‐Salute San Raffaele University Milan Italy
- Neurology Unit and Neurophysiology Unit IRCCS San Raffaele Scientific Institute Milan Italy
| |
Collapse
|
39
|
Mantel T, Altenmüller E, Li Y, Lee A, Meindl T, Jochim A, Zimmer C, Haslinger B. Structure-function abnormalities in cortical sensory projections in embouchure dystonia. NEUROIMAGE-CLINICAL 2020; 28:102410. [PMID: 32932052 PMCID: PMC7495104 DOI: 10.1016/j.nicl.2020.102410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/29/2020] [Accepted: 08/30/2020] [Indexed: 12/29/2022]
Abstract
BACKGROUND Embouchure dystonia (ED) is a task-specific focal dystonia in professional brass players leading to abnormal orofacial muscle posturing/spasms during performance. Previous studies have outlined abnormal cortical sensorimotor function during sensory/motor tasks and in the resting state as well as abnormal cortical sensorimotor structure. Yet, potentially underlying white-matter tract abnormalities in this network disease are unknown. OBJECTIVE To delineate structure-function abnormalities within cerebral sensorimotor trajectories in ED. METHOD Probabilistic tractography and seed-based functional connectivity analysis were performed in 16/16 ED patients/healthy brass players within a simple literature-informed network model of cortical sensorimotor processing encompassing supplementary motor, superior parietal, primary somatosensory and motor cortex as well as the putamen. Post-hoc grey matter volumetry was performed within cortices of abnormal trajectories. RESULTS ED patients showed average axial diffusivity reduction within projections between the primary somatosensory cortex and putamen, with converse increases within projections between supplementary motor and superior parietal cortex in both hemispheres. Increase in the mode of anisotropy in patients was accompanying the latter left-hemispheric projection, as well as in the supplementary motor area's projection to the left primary motor cortex. Patient's left primary somatosensory functional connectivity with the putamen was abnormally reduced and significantly associated with the axial diffusivity reduction. Left primary somatosensory grey matter volume was increased in patients. CONCLUSION Correlates of abnormal tract integrity within primary somatosensory cortico-subcortical projections and higher-order sensorimotor projections support the key role of dysfunctional sensory information propagation in ED pathophysiology. Differential directionality of cortico-cortical and cortico-subcortical abnormalities hints at non-uniform sensory system changes.
Collapse
Affiliation(s)
- Tobias Mantel
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaningerstrasse 22, Munich, Germany
| | - Eckart Altenmüller
- Hochschule für Musik, Theater und Medien Hannover, Emmichplatz 1, Hanover, Germany
| | - Yong Li
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaningerstrasse 22, Munich, Germany
| | - André Lee
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaningerstrasse 22, Munich, Germany; Hochschule für Musik, Theater und Medien Hannover, Emmichplatz 1, Hanover, Germany
| | - Tobias Meindl
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaningerstrasse 22, Munich, Germany
| | - Angela Jochim
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaningerstrasse 22, Munich, Germany
| | - Claus Zimmer
- Department of Neuroradiology, Klinikum rechts der Isar, Technische Universität München, Ismaningerstrasse 22, Munich, Germany
| | - Bernhard Haslinger
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Ismaningerstrasse 22, Munich, Germany.
| |
Collapse
|
40
|
Norris SA, Morris AE, Campbell MC, Karimi M, Adeyemo B, Paniello RC, Snyder AZ, Petersen SE, Mink JW, Perlmutter JS. Regional, not global, functional connectivity contributes to isolated focal dystonia. Neurology 2020; 95:e2246-e2258. [PMID: 32913023 DOI: 10.1212/wnl.0000000000010791] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 05/13/2020] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE To test the hypothesis that there is shared regional or global functional connectivity dysfunction in a large cohort of patients with isolated focal dystonia affecting different body regions compared to control participants. In this case-control study, we obtained resting-state MRI scans (three or four 7.3-minute runs) with eyes closed in participants with focal dystonia (cranial [17], cervical [13], laryngeal [18], or limb [10]) and age- and sex-matched controls. METHODS Rigorous preprocessing for all analyses was performed to minimize effect of head motion during scan acquisition (dystonia n = 58, control n = 47 analyzed). We assessed regional functional connectivity by computing a seed-correlation map between putamen, pallidum, and sensorimotor cortex and all brain voxels. We assessed significant group differences on a cluster-wise basis. In a separate analysis, we applied 300 seed regions across the cortex, cerebellum, basal ganglia, and thalamus to comprehensively sample the whole brain. We obtained participant whole-brain correlation matrices by computing the correlation between seed average time courses for each seed pair. Weighted object-oriented data analysis assessed group-level whole-brain differences. RESULTS Participants with focal dystonia had decreased functional connectivity at the regional level, within the striatum and between lateral primary sensorimotor cortex and ventral intraparietal area, whereas whole-brain correlation matrices did not differ between focal dystonia and control groups. Rigorous quality control measures eliminated spurious large-scale functional connectivity differences between groups. CONCLUSION Regional functional connectivity differences, not global network level dysfunction, contributes to common pathophysiologic mechanisms in isolated focal dystonia. Rigorous quality control eliminated spurious large-scale network differences between patients with focal dystonia and control participants.
Collapse
Affiliation(s)
- Scott A Norris
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY.
| | - Aimee E Morris
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| | - Meghan C Campbell
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| | - Morvarid Karimi
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| | - Babatunde Adeyemo
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| | - Randal C Paniello
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| | - Abraham Z Snyder
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| | - Steven E Petersen
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| | - Jonathan W Mink
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| | - Joel S Perlmutter
- From the Departments of Neurology (S.A.N., M.C.C., M.K., A.B., A.Z.S., S.E.P., J.S.P.), Radiology (S.A.N., M.C.C., A.Z.S., S.E.P., J.S.P.), Otolaryngology (R.C.P.), Neuroscience (S.E.P., J.S.P.), Psychology (S.E.P.), Physical Therapy (J.S.P.), and Occupational Therapy (J.S.P.), Washington University School of Medicine, St. Louis, MO; University of Rochester Medical Scientist Training Program and Neurosciences Graduate Program (A.E.M.); and Departments of Neurology, Neuroscience, and Pediatrics (J.W.M.), University of Rochester, NY
| |
Collapse
|
41
|
Thirugnanasambandam N, Zimmerman T, Pillai AS, Shields J, Horovitz SG, Hallett M. Task-specific interhemispheric hypoconnectivity in writer's cramp - An EEG study. Clin Neurophysiol 2020; 131:985-993. [PMID: 32193164 DOI: 10.1016/j.clinph.2020.01.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 12/11/2019] [Accepted: 01/07/2020] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Writer's cramp (WC) is a focal task-specific dystonia characterized by abnormal posturing of the hand muscles during handwriting, but not during other tasks that involve the same set of muscles and objects such as sharpening a pencil. Our objective was to investigate the pathophysiology underlying the task specificity of this disorder using EEG. We hypothesized that premotor-parietal connectivity will be lower in WC patients specifically during handwriting and motor imagery of handwriting. METHODS We recruited 15 WC patients and 15 healthy controls. EEG was recorded while participants performed 4 tasks - writing with a pencil, sharpening a pencil, imagining writing and imagining sharpening. We determined the connectivity changes between relevant brain regions during these tasks. RESULTS We found reduced interhemispheric alpha coherence in the sensorimotor areas in WC patients exclusively during handwriting. WC patients also showed less reduction of task-related beta spectral power and a trend for reduced premotor-parietal coherence during motor tasks. CONCLUSION We could not confirm an abnormality in premotor-parietal connectivity specific to handwriting by this method. However, there was a task-specific reduction in interhemispheric alpha connectivity in WC patients, whose behavioral correlate remains unknown. SIGNIFICANCE Interhemispheric alpha connectivity can be a potential interventional target in WC.
Collapse
Affiliation(s)
| | - Tyler Zimmerman
- Human Motor Control Section, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA; The Catholic University of America, Washington D.C., USA
| | - Ajay S Pillai
- Human Motor Control Section, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA
| | - Jessica Shields
- Human Motor Control Section, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA; Louisiana State University School of Medicine at New Orleans, USA
| | - Silvina G Horovitz
- Human Motor Control Section, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA
| | - Mark Hallett
- Human Motor Control Section, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA.
| |
Collapse
|
42
|
Chirumamilla VC, Dresel C, Koirala N, Gonzalez-Escamilla G, Deuschl G, Zeuner KE, Muthuraman M, Groppa S. Structural brain network fingerprints of focal dystonia. Ther Adv Neurol Disord 2019; 12:1756286419880664. [PMID: 31798688 PMCID: PMC6859688 DOI: 10.1177/1756286419880664] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 09/10/2019] [Indexed: 01/02/2023] Open
Abstract
Background: Focal dystonias are severe and disabling movement disorders of a still unclear origin. The structural brain networks associated with focal dystonia have not been well characterized. Here, we investigated structural brain network fingerprints in patients with blepharospasm (BSP) compared with those with hemifacial spasm (HFS), and healthy controls (HC). The patients were also examined following treatment with botulinum neurotoxin (BoNT). Methods: This study included matched groups of 13 BSP patients, 13 HFS patients, and 13 HC. We measured patients using structural-magnetic resonance imaging (MRI) at baseline and after one month BoNT treatment, at time points of maximal and minimal clinical symptom representation, and HC at baseline. Group regional cross-correlation matrices calculated based on grey matter volume were included in graph-based network analysis. We used these to quantify global network measures of segregation and integration, and also looked at local connectivity properties of different brain regions. Results: The networks in patients with BSP were more segregated than in patients with HFS and HC (p < 0.001). BSP patients had increased connectivity in frontal and temporal cortices, including sensorimotor cortex, and reduced connectivity in the cerebellum, relative to both HFS patients and HC (p < 0.05). Compared with HC, HFS patients showed increased connectivity in temporal and parietal cortices and a decreased connectivity in the frontal cortex (p < 0.05). In BSP patients, the connectivity of the frontal cortex diminished after BoNT treatment (p < 0.05). In contrast, HFS patients showed increased connectivity in the temporal cortex and reduced connectivity in cerebellum after BoNT treatment (p < 0.05). Conclusions: Our results show that BSP patients display alterations in both segregation and integration in the brain at the network level. The regional differences identified in the sensorimotor cortex and cerebellum of these patients may play a role in the pathophysiology of focal dystonia. Moreover, symptomatic reduction of hyperkinesia by BoNT treatment was associated with different brain network fingerprints in both BSP and HFS patients.
Collapse
Affiliation(s)
- Venkata C Chirumamilla
- Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, Focus Program Translational Neuroscience (FTN), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Christian Dresel
- Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, Focus Program Translational Neuroscience (FTN), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Nabin Koirala
- Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, Focus Program Translational Neuroscience (FTN), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Gabriel Gonzalez-Escamilla
- Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, Focus Program Translational Neuroscience (FTN), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Günther Deuschl
- Department of Neurology, University Hospital Schleswig-Holstein, University of Kiel, Kiel, Schleswig-Holstein, Germany
| | - Kirsten E Zeuner
- Department of Neurology, University Hospital Schleswig-Holstein, University of Kiel, Kiel, Schleswig-Holstein, Germany
| | - Muthuraman Muthuraman
- Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, Focus Program Translational Neuroscience (FTN), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Sergiu Groppa
- Movement Disorders and Neurostimulation, Department of Neurology, Focus Program Translational Neuroscience (FTN), Rhine-Main Neuroscience network (rmn), Johannes-Gutenberg-University Mainz, Langenbeckstr. 1, Mainz, 55131, Germany
| |
Collapse
|
43
|
Conte A, Rocchi L, Latorre A, Belvisi D, Rothwell JC, Berardelli A. Ten‐Year Reflections on the Neurophysiological Abnormalities of Focal Dystonias in Humans. Mov Disord 2019; 34:1616-1628. [DOI: 10.1002/mds.27859] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 08/20/2019] [Accepted: 08/23/2019] [Indexed: 12/12/2022] Open
Affiliation(s)
- Antonella Conte
- Department of Human Neurosciences Sapienza, University of Rome Rome Italy
- IRCCS Neuromed Pozzilli (IS) Italy
| | - Lorenzo Rocchi
- Department of Clinical and Movement Neurosciences UCL Queen Square Institute of Neurology London UK
| | - Anna Latorre
- Department of Human Neurosciences Sapienza, University of Rome Rome Italy
- Department of Clinical and Movement Neurosciences UCL Queen Square Institute of Neurology London UK
| | | | - John C. Rothwell
- Department of Clinical and Movement Neurosciences UCL Queen Square Institute of Neurology London UK
| | - Alfredo Berardelli
- Department of Human Neurosciences Sapienza, University of Rome Rome Italy
- IRCCS Neuromed Pozzilli (IS) Italy
| |
Collapse
|
44
|
The neurobiological basis for novel experimental therapeutics in dystonia. Neurobiol Dis 2019; 130:104526. [PMID: 31279827 DOI: 10.1016/j.nbd.2019.104526] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/13/2019] [Accepted: 07/03/2019] [Indexed: 12/17/2022] Open
Abstract
Dystonia is a movement disorder characterized by involuntary muscle contractions, twisting movements, and abnormal postures that may affect one or multiple body regions. Dystonia is the third most common movement disorder after Parkinson's disease and essential tremor. Despite its relative frequency, small molecule therapeutics for dystonia are limited. Development of new therapeutics is further hampered by the heterogeneity of both clinical symptoms and etiologies in dystonia. Recent advances in both animal and cell-based models have helped clarify divergent etiologies in dystonia and have facilitated the identification of new therapeutic targets. Advances in medicinal chemistry have also made available novel compounds for testing in biochemical, physiological, and behavioral models of dystonia. Here, we briefly review motor circuit anatomy and the anatomical and functional abnormalities in dystonia. We then discuss recently identified therapeutic targets in dystonia based on recent preclinical animal studies and clinical trials investigating novel therapeutics.
Collapse
|
45
|
A trial of a mechanical device for the treatment of blepharospasm. Eye (Lond) 2019; 33:1803-1808. [PMID: 31267089 DOI: 10.1038/s41433-019-0495-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 05/02/2019] [Accepted: 05/14/2019] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Idiopathic blepharospasm (IB) is a rare but well-characterised adult onset focal dystonia that may cause severe visual disability. The most effective treatment is with periodic injections of botulinum toxin (BTX) into the pre-tarsal and/or pre-septal orbicularis oculi muscles bilaterally. However, even with treatment, practical visual function often remains compromised. A subset of IB sufferers find that eye opening improves with a focal unilateral digital pressure usually on a specific point on the temple. This is known as a 'sensory trick'. We have developed a spectacle mounted device ('Pressop') to apply continuous individually localised focal pressure on the temple to mimic the effect of finger pressure. The aim of the study was to determine if the 'sensory trick' could be replicated by Pressop and if the interval between BTX treatments could thereby be extended. SUBJECTS/METHODS Study participants had three clinic visits-an initial screening assessment, a visit 2 weeks before the next injection was due when the device was fitted, and one 2 weeks later to assess the response to Pressop. A CDQ 24 and device-specific feedback questionnaire were completed and comparison photographs were taken. Repeat BTX injections were administered at the third visit. RESULTS Of 58 patients with typical IB recruited to the trial, 39 reported an effective focal finger pressure sensory trick. 56 completed the trial, more than 50% of whom reported some benefit using Pressop; 18% had substantial improvement, sustained for up to 5 years. Improvement could occur in those without an effective sensory trick, therefore there was no significant correlation between using a sensory trick and benefiting from 'Pressop'. There was a trend towards the responders having greater improvement in CDQ24 total score than non-responders but this was not statistically significant. CONCLUSIONS We recommend a trial of this simple safe device as a means of augmenting visual function in all IB patients.
Collapse
|
46
|
Jellinger KA. Neuropathology and pathogenesis of extrapyramidal movement disorders: a critical update-I. Hypokinetic-rigid movement disorders. J Neural Transm (Vienna) 2019; 126:933-995. [PMID: 31214855 DOI: 10.1007/s00702-019-02028-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 06/05/2019] [Indexed: 02/06/2023]
Abstract
Extrapyramidal movement disorders include hypokinetic rigid and hyperkinetic or mixed forms, most of them originating from dysfunction of the basal ganglia (BG) and their information circuits. The functional anatomy of the BG, the cortico-BG-thalamocortical, and BG-cerebellar circuit connections are briefly reviewed. Pathophysiologic classification of extrapyramidal movement disorder mechanisms distinguish (1) parkinsonian syndromes, (2) chorea and related syndromes, (3) dystonias, (4) myoclonic syndromes, (5) ballism, (6) tics, and (7) tremor syndromes. Recent genetic and molecular-biologic classifications distinguish (1) synucleinopathies (Parkinson's disease, dementia with Lewy bodies, Parkinson's disease-dementia, and multiple system atrophy); (2) tauopathies (progressive supranuclear palsy, corticobasal degeneration, FTLD-17; Guamian Parkinson-dementia; Pick's disease, and others); (3) polyglutamine disorders (Huntington's disease and related disorders); (4) pantothenate kinase-associated neurodegeneration; (5) Wilson's disease; and (6) other hereditary neurodegenerations without hitherto detected genetic or specific markers. The diversity of phenotypes is related to the deposition of pathologic proteins in distinct cell populations, causing neurodegeneration due to genetic and environmental factors, but there is frequent overlap between various disorders. Their etiopathogenesis is still poorly understood, but is suggested to result from an interaction between genetic and environmental factors. Multiple etiologies and noxious factors (protein mishandling, mitochondrial dysfunction, oxidative stress, excitotoxicity, energy failure, and chronic neuroinflammation) are more likely than a single factor. Current clinical consensus criteria have increased the diagnostic accuracy of most neurodegenerative movement disorders, but for their definite diagnosis, histopathological confirmation is required. We present a timely overview of the neuropathology and pathogenesis of the major extrapyramidal movement disorders in two parts, the first one dedicated to hypokinetic-rigid forms and the second to hyperkinetic disorders.
Collapse
Affiliation(s)
- Kurt A Jellinger
- Institute of Clinical Neurobiology, Alberichgasse 5/13, 1150, Vienna, Austria.
| |
Collapse
|
47
|
Sul B, Kim JS, Hong BY, Lim SH. The effect of dopamine for focal hand dystonia after stroke. Neurol Sci 2019; 40:1301-1302. [DOI: 10.1007/s10072-019-3705-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 01/04/2019] [Indexed: 10/27/2022]
|
48
|
Uehara K, Furuya S, Numazawa H, Kita K, Sakamoto T, Hanakawa T. Distinct roles of brain activity and somatotopic representation in pathophysiology of focal dystonia. Hum Brain Mapp 2019; 40:1738-1749. [PMID: 30570801 DOI: 10.1002/hbm.24486] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 10/25/2018] [Accepted: 11/21/2018] [Indexed: 12/18/2022] Open
Abstract
Two main neural mechanisms including loss of cortical inhibition and maladaptive plasticity have been thought to be involved in the pathophysiology of focal task-specific dystonia. Such loss of inhibition and maladaptive plasticity likely correspond to cortical overactivity and disorganized somatotopy, respectively. However, the most plausible mechanism of focal task-specific dystonia remains unclear. To address this question, we assessed brain activity and somatotopic representations of motor-related brain areas using functional MRI and behavioral measurement in healthy instrumentalists and patients with embouchure dystonia as an example of focal task-specific dystonia. Dystonic symptoms were measured as variability of fundamental frequency during long tone playing. We found no significant differences in brain activity between the embouchure dystonia and healthy wind instrumentalists in the motor-related areas. Assessment of somatotopy, however, revealed significant differences in the somatotopic representations of the mouth area for the right somatosensory cortex between the two groups. Multiple-regression analysis revealed brain activity in the primary motor and somatosensory cortices, cerebellum, and putamen was significantly associated with variability of fundamental frequency signals representing dystonic symptoms. Conversely, somatotopic representations in motor-related brain areas were not associated with variability of fundamental frequency signals in embouchure dystonia. The present findings suggest that abnormal motor-related network activity and aberrant somatotopy correlate with different aspects of mechanisms underlying focal task-specific dystonia.
Collapse
Affiliation(s)
- Kazumasa Uehara
- Department of Advanced Neuroimaging, Integrative Brain Imaging Center (IBIC), National Center of Neurology and Psychiatry, Tokyo, Japan.,Musical Skill and Injury Center (MuSIC), Sophia University, Tokyo, Japan.,Research fellow of the Japan Society for the Promotion of Science, Tokyo, Japan
| | - Shinichi Furuya
- Department of Advanced Neuroimaging, Integrative Brain Imaging Center (IBIC), National Center of Neurology and Psychiatry, Tokyo, Japan.,Musical Skill and Injury Center (MuSIC), Sophia University, Tokyo, Japan.,Sony Computer Science Laboratories Inc. (Sony CSL), Tokyo, Japan
| | - Hidemi Numazawa
- Department of Advanced Neuroimaging, Integrative Brain Imaging Center (IBIC), National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Kahori Kita
- Department of Advanced Neuroimaging, Integrative Brain Imaging Center (IBIC), National Center of Neurology and Psychiatry, Tokyo, Japan.,Musical Skill and Injury Center (MuSIC), Sophia University, Tokyo, Japan.,Center for Frontier Medical Engineering, Chiba University, Chiba, Japan
| | - Takashi Sakamoto
- Department of Neurology, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Takashi Hanakawa
- Department of Advanced Neuroimaging, Integrative Brain Imaging Center (IBIC), National Center of Neurology and Psychiatry, Tokyo, Japan.,Musical Skill and Injury Center (MuSIC), Sophia University, Tokyo, Japan
| |
Collapse
|
49
|
Battistella G, Simonyan K. Top-down alteration of functional connectivity within the sensorimotor network in focal dystonia. Neurology 2019; 92:e1843-e1851. [PMID: 30918091 DOI: 10.1212/wnl.0000000000007317] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 12/17/2018] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES To determine the directionality of regional interactions and influences of one region on another within the functionally abnormal sensorimotor network in isolated focal dystonia. METHODS A total of 40 patients with spasmodic dysphonia with and without dystonic tremor of voice and 35 healthy controls participated in the study. Independent component analysis (ICA) of resting-state fMRI was used to identify 4 abnormally coupled brain regions within the functional sensorimotor network in all patients compared to controls. Follow-up spectral dynamic causal modeling (DCM) estimated regional effective connectivity between patients and controls and between patients with spasmodic dysphonia with and without dystonic tremor of voice to expand the understanding of symptomatologic variability associated with this disorder. RESULTS ICA found abnormally reduced functional connectivity of the left inferior parietal cortex, putamen, and bilateral premotor cortex in all patients compared to controls, pointing to a largely overlapping pathophysiology of focal dystonia and dystonic tremor. DCM determined that the disruption of the sensorimotor network was both top-down, involving hyperexcitable parieto-putaminal influence, and interhemispheric, involving right-to-left hyperexcitable premotor coupling in all patients compared to controls. These regional alterations were associated with their abnormal self-inhibitory function when comparing patients with spasmodic dysphonia patients with and without dystonic tremor of voice. CONCLUSIONS Abnormal hyperexcitability of premotor-parietal-putaminal circuitry may be explained by altered information transfer between these regions due to underlying deficient connectivity. Identification of brain regions involved in processing of sensorimotor information in preparation for movement execution suggests that complex network disruption is staged well before the dystonic behavior is produced by the primary motor cortex.
Collapse
Affiliation(s)
- Giovanni Battistella
- From the Memory and Aging Center (G.B.), Department of Neurology, University of California San Francisco; Department of Otolaryngology (K.S.), Massachusetts Eye and Ear; Department of Neurology (K.S.), Massachusetts General Hospital (K.S.); and Harvard Medical School (K.S.), Boston, MA
| | - Kristina Simonyan
- From the Memory and Aging Center (G.B.), Department of Neurology, University of California San Francisco; Department of Otolaryngology (K.S.), Massachusetts Eye and Ear; Department of Neurology (K.S.), Massachusetts General Hospital (K.S.); and Harvard Medical School (K.S.), Boston, MA.
| |
Collapse
|
50
|
Brodoehl S, Wagner F, Prell T, Klingner C, Witte OW, Günther A. Cause or effect: Altered brain and network activity in cervical dystonia is partially normalized by botulinum toxin treatment. NEUROIMAGE-CLINICAL 2019; 22:101792. [PMID: 30928809 PMCID: PMC6444302 DOI: 10.1016/j.nicl.2019.101792] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/14/2019] [Accepted: 03/24/2019] [Indexed: 01/17/2023]
Abstract
Background Idiopathic cervical dystonia (CD) is a chronic movement disorder characterized by impressive clinical symptoms and the lack of clear pathological findings in clinical diagnostics and imaging. At present, the injection of botulinum toxin (BNT) in dystonic muscles is an effective therapy to control motor symptoms and pain in CD. Objectives We hypothesized that, although it is locally injected to dystonic muscles, BNT application leads to changes in brain and network activity towards normal brain function. Methods Using 3 T functional MR imaging along with advanced analysis techniques (functional connectivity, Granger causality, and regional homogeneity), we aimed to characterize brain activity in CD (17 CD patients vs. 17 controls) and to uncover the effects of BNT treatment (at 6 months). Results In CD, we observed an increased information flow within the basal ganglia, the thalamus, and the sensorimotor cortex. In parallel, some of these structures became less responsive to regulating inputs. Furthermore, our results suggested an altered somatosensory integration. Following BNT administration, we noted a shift towards normal brain function in the CD patients, especially within the motor cortex, the somatosensory cortex, and the basal ganglia. Conclusion The changes in brain function and network activity in CD can be interpreted as related to the underlying cause, the effort to compensate or a mixture of both. Although BNT is applied in the last stage of the cortico-neuromuscular pathway, brain patterns are shifted towards those of healthy controls. we characterized brain activity in CD and the effects of BNT using 3T fMR imaging and network analysis techniques following treatment with botulinum toxin (BNT), abnormal brain activity patterns in primary dystonia are attenuated critical key regions for both the pathophysiology and BNT-induced improvement in cervical dystonia are the BG
Collapse
Affiliation(s)
- Stefan Brodoehl
- Hans Berger Department for Neurology, Friedrich Schiller University of Jena, Germany; Brain Imaging Center, Friedrich Schiller University Jena, Germany.
| | - Franziska Wagner
- Hans Berger Department for Neurology, Friedrich Schiller University of Jena, Germany; Brain Imaging Center, Friedrich Schiller University Jena, Germany
| | - Tino Prell
- Hans Berger Department for Neurology, Friedrich Schiller University of Jena, Germany; Center for Healthy Aging, Jena University Hospital, Jena, Germany
| | - Carsten Klingner
- Hans Berger Department for Neurology, Friedrich Schiller University of Jena, Germany; Brain Imaging Center, Friedrich Schiller University Jena, Germany
| | - O W Witte
- Hans Berger Department for Neurology, Friedrich Schiller University of Jena, Germany; Brain Imaging Center, Friedrich Schiller University Jena, Germany; Center for Healthy Aging, Jena University Hospital, Jena, Germany
| | - Albrecht Günther
- Hans Berger Department for Neurology, Friedrich Schiller University of Jena, Germany
| |
Collapse
|