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Ordás CM, Alonso-Frech F. The neural basis of somatosensory temporal discrimination threshold as a paradigm for time processing in the sub-second range: An updated review. Neurosci Biobehav Rev 2024; 156:105486. [PMID: 38040074 DOI: 10.1016/j.neubiorev.2023.105486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 11/20/2023] [Accepted: 11/27/2023] [Indexed: 12/03/2023]
Abstract
BACKGROUND AND OBJECTIVE The temporal aspect of somesthesia is a feature of any somatosensory process and a pre-requisite for the elaboration of proper behavior. Time processing in the milliseconds range is crucial for most of behaviors in everyday life. The somatosensory temporal discrimination threshold (STDT) is the ability to perceive two successive stimuli as separate in time, and deals with time processing in this temporal range. Herein, we focus on the physiology of STDT, on a background of the anatomophysiology of somesthesia and the neurobiological substrates of timing. METHODS A review of the literature through PubMed & Cochrane databases until March 2023 was performed with inclusion and exclusion criteria following PRISMA recommendations. RESULTS 1151 abstracts were identified. 4 duplicate records were discarded before screening. 957 abstracts were excluded because of redundancy, less relevant content or not English-written. 4 were added after revision. Eventually, 194 articles were included. CONCLUSIONS STDT encoding relies on intracortical inhibitory S1 function and is modulated by the basal ganglia-thalamic-cortical interplay through circuits involving the nigrostriatal dopaminergic pathway and probably the superior colliculus.
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Affiliation(s)
- Carlos M Ordás
- Universidad Rey Juan Carlos, Móstoles, Madrid, Spain; Department of Neurology, Hospital Rey Juan Carlos, Móstoles, Madrid, Spain.
| | - Fernando Alonso-Frech
- Department of Neurology, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Spain
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Esposito M, Palermo S, Nahi YC, Tamietto M, Celeghin A. Implicit Selective Attention: The Role of the Mesencephalic-basal Ganglia System. Curr Neuropharmacol 2024; 22:1497-1512. [PMID: 37653629 PMCID: PMC11097991 DOI: 10.2174/1570159x21666230831163052] [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: 03/13/2023] [Revised: 04/13/2023] [Accepted: 04/13/2023] [Indexed: 09/02/2023] Open
Abstract
The ability of the brain to recognize and orient attention to relevant stimuli appearing in the visual field is highlighted by a tuning process, which involves modulating the early visual system by both cortical and subcortical brain areas. Selective attention is coordinated not only by the output of stimulus-based saliency maps but is also influenced by top-down cognitive factors, such as internal states, goals, or previous experiences. The basal ganglia system plays a key role in implicitly modulating the underlying mechanisms of selective attention, favouring the formation and maintenance of implicit sensory-motor memories that are capable of automatically modifying the output of priority maps in sensory-motor structures of the midbrain, such as the superior colliculus. The article presents an overview of the recent literature outlining the crucial contribution of several subcortical structures to the processing of different sources of salient stimuli. In detail, we will focus on how the mesencephalic- basal ganglia closed loops contribute to implicitly addressing and modulating selective attention to prioritized stimuli. We conclude by discussing implicit behavioural responses observed in clinical populations in which awareness is compromised at some level. Implicit (emergent) awareness in clinical conditions that can be accompanied by manifest anosognosic symptomatology (i.e., hemiplegia) or involving abnormal conscious processing of visual information (i.e., unilateral spatial neglect and blindsight) represents interesting neurocognitive "test cases" for inferences about mesencephalicbasal ganglia closed-loops involvement in the formation of implicit sensory-motor memories.
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Affiliation(s)
- Matteo Esposito
- Department of Psychology, University of Torino, Via Verdi 10, 10124, Turin
| | - Sara Palermo
- Department of Psychology, University of Torino, Via Verdi 10, 10124, Turin
- Neuroradiology Unit, Department of Diagnostic and Technology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | | | - Marco Tamietto
- Department of Psychology, University of Torino, Via Verdi 10, 10124, Turin
- Department of Medical and Clinical Psychology, and CoRPS - Center of Research on Psychology in Somatic Diseases, Tilburg University, PO Box 90153, 5000 LE Tilburg, The Netherlands
| | - Alessia Celeghin
- Department of Psychology, University of Torino, Via Verdi 10, 10124, Turin
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Martino D. What can epidemiological studies teach on the pathophysiology of adult-onset isolated dystonia? INTERNATIONAL REVIEW OF NEUROBIOLOGY 2023; 169:21-60. [PMID: 37482393 DOI: 10.1016/bs.irn.2023.05.015] [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
Several demographic and environmental factors may play an important role in determining the risk of developing adult-onset isolated dystonia (AOID) and/or modifying its course. However, epidemiologic studies have provided to date only partial insight on the disease mechanisms that are actively influenced by these factors. The age-related increase in female predominance in both patients diagnosed with AOID and subjects carrying its putative mediational phenotype suggests sexual dimorphism that has been demonstrated for mechanisms related to blepharospasm and cervical dystonia. The opposite relationship that spread and spontaneous remission of AOID have with age suggests age-related decline of compensatory mechanisms that protect from the progression of AOID. Epidemiological studies focusing on environmental risk factors yielded associations only with specific forms of AOID, even for those factors that are not likely to predispose exclusively to specific focal forms (for example, only writing dystonia was found associated with head trauma, and only blepharospasm with coffee intake). Other factors show biological plausibility of their mechanistic role for specific forms, e.g., dry eye syndrome or sunlight exposure for blepharospasm, scoliosis for cervical dystonia, repetitive writing for writing dystonia. Overall, the relationship between environment and AOID remains complex and incompletely defined. Both hypothesis-driven preclinical studies and well-designed cross-sectional or prospective clinical studies are still necessary to decipher this intricate relationship.
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Affiliation(s)
- Davide Martino
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Health Sciences Centre, Hospital Drive NW, Calgary, AB, Canada; The Hotchkiss Brain Institute, and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada.
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Benarroch E. What Are the Functions of the Superior Colliculus and Its Involvement in Neurologic Disorders? Neurology 2023; 100:784-790. [PMID: 37068960 PMCID: PMC10115501 DOI: 10.1212/wnl.0000000000207254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 02/16/2023] [Indexed: 04/19/2023] Open
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Rafee S, Hutchinson M, Reilly R. The Collicular-Pulvinar-Amygdala Axis and Adult-Onset Idiopathic Focal Dystonias. ADVANCES IN NEUROBIOLOGY 2023; 31:195-210. [PMID: 37338703 DOI: 10.1007/978-3-031-26220-3_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Adult-onset idiopathic focal dystonias (AOIFD) are the most common type of dystonia. It has varied expression including multiple motor (depending on body part affected) and non-motor symptoms (psychiatric, cognitive and sensory). The motor symptoms are usually the main reason for presentation and are most often treated with botulinum toxin. However, non-motor symptoms are the main predictors of quality of life and should be addressed appropriately, as well as treating the motor disorder. Rather than considering AOIFD as a movement disorder, a syndromic approach should be taken, one that accommodates all the symptoms. Dysfunction of the collicular-pulvinar-amygdala axis, with the superior colliculus as a central node, can explain the diverse expression of this syndrome.
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Affiliation(s)
- Shameer Rafee
- Department of Neurology, St Vincent's University Hospital, Dublin, Ireland
| | - Michael Hutchinson
- Department of Neurology, St Vincent's University Hospital, Dublin, Ireland
| | - Richard Reilly
- Trinity Centre for Biomedical Engineering, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland.
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Borngräber F, Hoffmann M, Paulus T, Junker J, Bäumer T, Altenmüller E, Kühn AA, Schmidt A. Characterizing the temporal discrimination threshold in musician's dystonia. Sci Rep 2022; 12:14939. [PMID: 36056047 PMCID: PMC9440005 DOI: 10.1038/s41598-022-18739-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/18/2022] [Indexed: 11/28/2022] Open
Abstract
The temporal discrimination threshold (TDT) has been established as a biomarker of impaired temporal processing and endophenotype in various forms of focal dystonia patients, such as cervical dystonia, writer's cramp or blepharospasm. The role of TDT in musician's dystonia (MD) in contrast is less clear with preceding studies reporting inconclusive results. We therefore compared TDT between MD patients, healthy musicians and non-musician controls using a previously described visual, tactile, and visual-tactile paradigm. Additionally, we compared TDT of the dystonic and non-dystonic hand and fingers in MD patients and further characterized the biomarker regarding its potential influencing factors, i.e. musical activity, disease variables, and personality profiles. Repeated measures ANOVA and additional Bayesian analyses revealed lower TDT in healthy musicians compared to non-musicians. However, TDTs in MD patients did not differ from both healthy musicians and non-musicians, although pairwise Bayesian t-tests indicated weak evidence for group differences in both comparisons. Analyses of dystonic and non-dystonic hands and fingers revealed no differences. While in healthy musicians, age of first instrumental practice negatively correlated with visual-tactile TDTs, TDTs in MD patients did not correlate with measures of musical activity, disease variables or personality profiles. In conclusion, TDTs in MD patients cannot reliably be distinguished from healthy musicians and non-musicians and are neither influenced by dystonic manifestation, musical activity, disease variables nor personality profiles. Unlike other isolated focal dystonias, TDT seems not to be a reliable biomarker in MD.
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Affiliation(s)
- Friederike Borngräber
- Berlin Center for Musicians' Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany.
- Kurt Singer Institute for Music Physiology and Musicians' Health, Hanns Eisler School of Music Berlin, Berlin, Germany.
- Charité-Universitätsmedizin Berlin, Movement Disorder and Neuromodulation Unit, Department of Neurology, Berlin, Germany.
- Berlin Institute of Health (BIH) at Charité-Universitätsmedizin Berlin, Berlin, Germany.
| | - Martina Hoffmann
- Berlin Center for Musicians' Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
- Kurt Singer Institute for Music Physiology and Musicians' Health, Hanns Eisler School of Music Berlin, Berlin, Germany
- Charité-Universitätsmedizin, Department of Neurology, Berlin, Germany
| | - Theresa Paulus
- Department of Neurology, University of Lübeck, Lübeck, Germany
- Institute of Systems Motor Science, University of Lübeck, Lübeck, Germany
| | - Johanna Junker
- Department of Neurology, University of Lübeck, Lübeck, Germany
- Institute of Systems Motor Science, University of Lübeck, Lübeck, Germany
| | - Tobias Bäumer
- Institute of Systems Motor Science, University of Lübeck, Lübeck, Germany
| | - Eckart Altenmüller
- Institute of Music Physiology and Musicians' Medicine, Hanover University of Music, Drama and Media, Hanover, Germany
| | - Andrea A Kühn
- Charité-Universitätsmedizin Berlin, Movement Disorder and Neuromodulation Unit, Department of Neurology, Berlin, Germany
| | - Alexander Schmidt
- Berlin Center for Musicians' Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
- Kurt Singer Institute for Music Physiology and Musicians' Health, Hanns Eisler School of Music Berlin, Berlin, Germany
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Moriarty A, Rafee S, Ndukwe I, O’Riordan S, Hutchinson M. Longitudinal follow up of mood in cervical dystonia and influence on age at onset. Mov Disord Clin Pract 2022; 9:614-618. [PMID: 35844277 PMCID: PMC9274366 DOI: 10.1002/mdc3.13457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/29/2022] [Accepted: 03/12/2022] [Indexed: 11/09/2022] Open
Abstract
Background Anxiety and depression are highly prevalent conditions in cervical dystonia and considered intrinsic to the disease mechanism. Psychiatric symptoms do not appear to be influenced by botulinum toxin therapy. Studies focusing on changes in mood disorder during the course of the disease are limited in this chronic, lifelong disorder. Objective To assess the longitudinal prevalence of mood disorder, pain, and quality of life in patients with cervical dystonia attending a botulinum toxin clinic. Methods Patients involved in phase I of our study were invited to be involved in reassessment using the Beck Depression Inventory, Second Revision; Beck Anxiety Index; Cervical Dystonia Impact Profile-58 (CDIP-58); and the Toronto Western Spasmodic Torticollis Rating Scale-2 Pain Scale (TWSTRS2-Pain). Results A total of 53 participants took part after a mean study interval duration of 24 months. There were no significant differences between the 2 study time points in the prevalence of anxiety (P = 0.2919) and depressive symptoms (P = 0.5). Self-reported quality of life by CDIP-58 (P = 0.96) and pain by TWSTRS2-Pain (P = 0.9321) were unchanged. Men and women with significant symptoms of mood disorder had an earlier age of onset of cervical dystonia (P = 0.008). Conclusion Anxiety and depressive symptoms persist in cervical dystonia, seem to be unrelated to pain severity, and need to be specifically targeted to improve quality of life. The relationship between mood disorder and age of onset suggest that mood disorder may be part of the disease pathophysiology.
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Affiliation(s)
- Andrew Moriarty
- Department of Neurology St Vincent’s University Hospital Dublin
- School Of Medicine University College Dublin Dublin
| | - Shameer Rafee
- Department of Neurology St Vincent’s University Hospital Dublin
- School Of Medicine University College Dublin Dublin
| | - Ihedinachi Ndukwe
- Department of Neurology St Vincent’s University Hospital Dublin
- School Of Medicine University College Dublin Dublin
| | - Sean O’Riordan
- Department of Neurology St Vincent’s University Hospital Dublin
| | - Michael Hutchinson
- Department of Neurology St Vincent’s University Hospital Dublin
- School Of Medicine University College Dublin Dublin
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Rafee S, Ndukwe I, O'Riordan S, Hutchinson M. Reliability of DNMSQuest as a Screening Tool for Mood Disorders in Cervical Dystonia. Mov Disord Clin Pract 2021; 8:925-931. [PMID: 34405100 DOI: 10.1002/mdc3.13273] [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: 04/14/2021] [Revised: 05/25/2021] [Accepted: 06/19/2021] [Indexed: 11/06/2022] Open
Abstract
Background The high prevalence of mood disorders in cervical dystonia, often unaddressed in botulinum toxin clinics, is a major factor in impaired quality of life. There is a clear need for a brief screening method for identifying these disorders; the Dystonia non-motor symptoms questionnaire (DNMSQuest) has been proposed as such. Objective We aimed to assess the practical utility of the DNMSQuest and compare it with validated rating scales for anxiety, depression and quality of life. Methods In 88 patients with cervical dystonia, we compared results from the DNMSQuest with mood rating scales [Beck Anxiety Inventory (BAI), Beck Depression Index (BDI-II) and Hospital Anxiety and Depression Scale (HADS)], quality of life measures [European Quality of Life (EQOL) and European Quality of Life Visual Analogue Scale (EQOLVAS)] and with assessments of dystonia severity [Cervical Dystonia Impact Profile-58 (CDIP58) and Toronto Western Rating Scale for Spasmodic Torticollis (TWSTRS)]. Results Using a cut off score on the DNMSQuest of 5, we noted that DNMSQuest had a sensitivity of 85% for detecting anxiety and depression using the BAI and BDI-II, and 76% and 78% for anxiety and depression respectively using the HADS. The DNMSQuest correlated strongly with BAI (ρ = 0.715), BDI-II (ρ = 0.658), HADS-Anxiety (ρ = 0.616), HADS-Depression (ρ = 0.706), EQOL (ρ = 0.653) and CDIP-58 (ρ = 0.665). Conclusion The DNMSQuest is a brief, sensitive and non-specific instrument for identifying patients that warrant further review for anxiety and depression and can easily be implemented in a neurologist-run botulinum toxin clinic.
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Affiliation(s)
- Shameer Rafee
- Department of Neurology St Vincent's University Hospital Dublin Ireland
| | - Ihedinachi Ndukwe
- Department of Neurology St Vincent's University Hospital Dublin Ireland
| | - Sean O'Riordan
- Department of Neurology St Vincent's University Hospital Dublin Ireland
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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.
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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
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Ferrazzano G, Frantellizzi V, De Bartolo MI, De Feo MS, Conte A, Fabbrini G, De Vincentis G, Berardelli A. Response to "Response to isolated head tremor: A DAT-SPECT and somatosensory temporal discrimination study". Parkinsonism Relat Disord 2021; 87:168-169. [PMID: 34078577 DOI: 10.1016/j.parkreldis.2021.05.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 05/23/2021] [Indexed: 11/17/2022]
Affiliation(s)
- Gina Ferrazzano
- Department of Human Neuroscience, Sapienza University of Rome, Viale Dell'Università 30, 00185, Rome, Italy.
| | - Viviana Frantellizzi
- Department of Radiological Sciences, Oncology and Anatomical Pathology, Sapienza University of Rome, Viale Del Policlinico 155, 00161, Rome, Italy.
| | | | - Maria Silvia De Feo
- Department of Radiological Sciences, Oncology and Anatomical Pathology, Sapienza University of Rome, Viale Del Policlinico 155, 00161, Rome, Italy.
| | - Antonella Conte
- Department of Human Neuroscience, Sapienza University of Rome, Viale Dell'Università 30, 00185, Rome, Italy; IRCCS NEUROMED, Via Atinense 18, 86077, Pozzilli, Italy.
| | - Giovanni Fabbrini
- Department of Human Neuroscience, Sapienza University of Rome, Viale Dell'Università 30, 00185, Rome, Italy; IRCCS NEUROMED, Via Atinense 18, 86077, Pozzilli, Italy.
| | - Giuseppe De Vincentis
- Department of Radiological Sciences, Oncology and Anatomical Pathology, Sapienza University of Rome, Viale Del Policlinico 155, 00161, Rome, Italy.
| | - Alfredo Berardelli
- Department of Human Neuroscience, Sapienza University of Rome, Viale Dell'Università 30, 00185, Rome, Italy; IRCCS NEUROMED, Via Atinense 18, 86077, Pozzilli, Italy.
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Does the network model fits neurophysiological abnormalities in blepharospasm? Neurol Sci 2020; 41:2067-2079. [DOI: 10.1007/s10072-020-04347-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 03/16/2020] [Indexed: 10/24/2022]
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Abstract
PURPOSE OF REVIEW This article provides a summary of the state of the art in the diagnosis, classification, etiologies, and treatment of dystonia. RECENT FINDINGS Although many different clinical manifestations of dystonia have been recognized for decades, it is only in the past 5 years that a broadly accepted approach has emerged for classifying them into specific subgroups. The new classification system aids clinical recognition and diagnosis by focusing on key clinical features that help distinguish the many subtypes. In the past few years, major advances have been made in the discovery of new genes as well as advances in our understanding of the biological processes involved. These advances have led to major changes in strategies for diagnosis of the inherited dystonias. An emerging trend is to move away from heavy reliance on the phenotype to target diagnostic testing toward a broader approach that involves large gene panels or whole exome sequencing. SUMMARY The dystonias are a large family of phenotypically and etiologically diverse disorders. The diagnosis of these disorders depends on clinical recognition of characteristic clinical features. Symptomatic treatments are useful for all forms of dystonia and include oral medications, botulinum toxins, and surgical procedures. Determination of etiology is becoming increasingly important because the number of disorders is growing and more specific and sometimes disease-modifying therapies now exist.
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Narasimham S, Sundarajan V, McGovern E, Quinlivan B, Killian O, O'Riordan S, Hutchinson M, Reilly RB. Characterizing Brain Network Topology in Cervical Dystonia Patients and Unaffected Relatives via Graph Theory. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2020; 2019:1694-1697. [PMID: 31946223 DOI: 10.1109/embc.2019.8856624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Cervical Dystonia (CD) is a neurological movement disorder characterized by intermittent muscle contractions in the head and neck. The pathophysiology and neural networks underpinning this condition are incompletely understood. There is increasing evidence that isolated focal dystonias are due to network-wide functional alterations. An abnormal temporal discrimination threshold (TDT) is believed to be a mediational endophenotype due to its prevalence in unaffected first-degree relatives as well as patients. However the neural correlates linking abnormal TDT and CD remain poorly understood. Probing changes in large-scale network topology via graph theory with resting state fMRI data from relatives and patients may provide further insight into the pathophysiology of CD. In this study, resting state fMRI data were acquired and analyzed from 16 CD patients with abnormal TDT, 32 unaffected first degree relatives (16 with normal TDT and 16 with abnormal TDT) and 16 healthy controls. Graph theory metrics demonstrating network topology were extracted. The results indicate large-scale functional reorganization of networks in relatives (with abnormal TDT) along with a manifestation of topological aberrations similar to patients.
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Duggan O, Narasimham S, Govern EM, Killian O, O'Riordan S, Hutchinson M, Reilly RB. A Study of the Midbrain Network for Covert Attentional Orienting in Cervical Dystonia Patients using Dynamic Causal Modelling. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2020; 2019:3519-3522. [PMID: 31946637 DOI: 10.1109/embc.2019.8857152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Understanding the neuronal network dynamics underlying the third most common movement disorder, cervical dystonia, can be achieved using dynamic causal modelling. Current literature establishes structures of the midbrain network for covert attentional orienting as dysfunctional in patients with cervical dystonia. One of these structures is the superior colliculus, for which it is hypothesised that deficient GABAergic activity therein causes cervical dystonia. To understand the role that this node plays in cervical dystonia, various connectivity models of the midbrain network were compared under the influence of a loom-recede visual stimulus fMRI paradigm. These models included the thalamus and striatum, crucial nodes in the direct/indirect pathways for motor movement and inhibition. The parametric empirical Bayes approach was used to quantify the difference in connection strengths across the winning models between patients and controls. Our findings demonstrated greater modulation by a looming stimulus event on the strength of connection from the striatum to the superior colliculus in patients. These results offer new means to understanding the pathophysiology of cervical dystonia.
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Avanzino L, Cherif A, Crisafulli O, Carbone F, Zenzeri J, Morasso P, Abbruzzese G, Pelosin E, Konczak J. Tactile and proprioceptive dysfunction differentiates cervical dystonia with and without tremor. Neurology 2020; 94:e639-e650. [DOI: 10.1212/wnl.0000000000008916] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 08/28/2019] [Indexed: 12/13/2022] Open
Abstract
ObjectiveTo determine whether different phenotypes of cervical dystonia (CD) express different types and levels of somatosensory impairment.MethodsWe assessed somatosensory function in patients with CD with and without tremor (n = 12 each) and in healthy age-matched controls (n = 22) by measuring tactile temporal discrimination thresholds of the nondystonic forearm and proprioceptive acuity in both the dystonic (head/neck) and nondystonic body segments (forearm/hand) using a joint position‐matching task. The head or the wrist was passively displaced along different axes to distinct joint positions by the experimenter or through a robotic exoskeleton. Participants actively reproduced the experienced joint position, and the absolute joint position‐matching error between the target and the reproduced positions served as a marker of proprioceptive acuity.ResultsTactile temporal discrimination thresholds were significantly elevated in both CD subgroups compared to controls. Proprioceptive acuity of both the dystonic and nondystonic body segments was elevated in patients with CD and tremor with respect to both healthy controls and patients with CD without tremor. That is, tactile abnormalities were a shared dysfunction of both CD phenotypes, while proprioceptive dysfunction was observed in patients with CD with tremor.ConclusionsOur findings suggest that the pathophysiology in CD can be characterized by 2 abnormal neural processes: a dysfunctional somatosensory gating mechanism involving the basal ganglia that triggers involuntary muscle spasms and abnormal processing of proprioceptive information within a defective corticocerebellar loop, likely affecting the feedback and feedforward control of head positioning. This dysfunction is expressed mainly in CD with tremor.
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Abstract
In a range of neurological conditions, including movement disorders, sex-related differences are emerging not only in brain anatomy and function, but also in pathogenesis, clinical features and response to treatment. In Parkinson disease (PD), for example, oestrogens can influence the severity of motor symptoms, whereas elevation of androgens can exacerbate tic disorders. Nevertheless, the real impact of sex differences in movement disorders remains under-recognized. In this article, we provide an up-to-date review of sex-related differences in PD and the most common hyperkinetic movement disorders, namely, essential tremor, dystonia, Huntington disease and other chorea syndromes, and Tourette syndrome and other chronic tic disorders. We highlight the most relevant clinical aspects of movement disorders that differ between men and women. Increased recognition of these differences and their impact on patient care could aid the development of tailored approaches to the management of movement disorders and enable the optimization of preclinical research and clinical studies.
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Odorfer TM, Wind T, Zeller D. Temporal Discrimination Thresholds and Proprioceptive Performance: Impact of Age and Nerve Conduction. Front Neurosci 2019; 13:1241. [PMID: 31803012 PMCID: PMC6877661 DOI: 10.3389/fnins.2019.01241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 11/04/2019] [Indexed: 11/25/2022] Open
Abstract
Background Increasing attention is payed to the contribution of somatosensory processing in motor control. In particular, temporal somatosensory discrimination has been found to be altered differentially in common movement disorders. To date, there have only been speculations as to how impaired temporal discrimination and clinical motor signs may relate to each other. Prior to disentangling this relationship, potential confounders of temporal discrimination, in particular age and peripheral nerve conduction, should be assessed, and a quantifiable measure of proprioceptive performance should be established. Objective To assess the influence of age and polyneuropathy (PNP) on somatosensory temporal discrimination threshold (STDT), temporal discrimination movement threshold (TDMT), and behavioral measures of proprioception of upper and lower limbs. Methods STDT and TDMT were assessed in 79 subjects (54 healthy, 25 with PNP; age 30–79 years). STDT was tested with surface electrodes over the thenar or dorsal foot region. TDMT was probed with needle electrodes in flexor carpi radialis (FCR) and tibialis anterior (TA) muscle. Goniometer-based devices were used to assess limb proprioception during (i) active pointing to LED markers, (ii) active movements in response to variable visual cues, and (iii) estimation of limb position following passive movements. Pointing (or estimation) error was taken as a measure of proprioceptive performance. Results In healthy subjects, higher age was associated with higher STDT and TDMT at upper and lower extremities, while age did not correlate with proprioceptive performance. Patients with PNP showed higher STDT and TDMT values and decreased proprioceptive performance in active pointing tasks compared to matched healthy subjects. As an additional finding, there was a significant correlation between performance in active pointing tasks and temporal discrimination thresholds. Conclusion Given their notable impact on measures of temporal discrimination, age and peripheral nerve conduction need to be accounted for if STDT and TDMT are applied in patients with movement disorders. As a side observation, the correlation between measures of proprioception and temporal discrimination may prompt further studies on the presumptive link between these two domains.
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Affiliation(s)
| | - Teresa Wind
- Department of Neurology, University of Würzburg, Würzburg, Germany
| | - Daniel Zeller
- Department of Neurology, University of Würzburg, Würzburg, Germany
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18
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Tarrano C, Wattiez N, Delorme C, McGovern EM, Brochard V, Thobois S, Tranchant C, Grabli D, Degos B, Corvol J, Pedespan J, Krystkoviak P, Houeto J, Degardin A, Defebvre L, Valabrègue R, Vidailhet M, Pouget P, Roze E, Worbe Y. Visual Sensory Processing is Altered in Myoclonus Dystonia. Mov Disord 2019; 35:151-160. [DOI: 10.1002/mds.27857] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 08/04/2019] [Accepted: 08/08/2019] [Indexed: 11/12/2022] Open
Affiliation(s)
- Clément Tarrano
- Sorbonne Université Paris, France; Inserm U1127, CNRS UMR 7225, UM 75, ICM Paris France
- Assistance Publique‐Hôpitaux de Paris, Centre d'Investigation Clinique Neurosciences, Hôpital Pitié‐Salpêtrière, Paris, France; Department of Neurology Groupe Hospitalier Pitié‐Salpêtrière Paris France
- Department of Neurology CHU Côte de Nacre, Université Caen Normandie Caen France
| | - Nicolas Wattiez
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique Paris France
| | - Cécile Delorme
- Sorbonne Université Paris, France; Inserm U1127, CNRS UMR 7225, UM 75, ICM Paris France
- Assistance Publique‐Hôpitaux de Paris, Centre d'Investigation Clinique Neurosciences, Hôpital Pitié‐Salpêtrière, Paris, France; Department of Neurology Groupe Hospitalier Pitié‐Salpêtrière Paris France
| | - Eavan M. McGovern
- Assistance Publique‐Hôpitaux de Paris, Centre d'Investigation Clinique Neurosciences, Hôpital Pitié‐Salpêtrière, Paris, France; Department of Neurology Groupe Hospitalier Pitié‐Salpêtrière Paris France
- Department of Neurology St Vincent's University Hospital Dublin Dublin Ireland
| | | | - Stéphane Thobois
- University of Lyon, Institut des Sciences Cognitives Marc Jeannerod, CNRS, UMR 5229, Bron, France; Hospices Civils de Lyon, Hôpital Neurologique Pierre Wertheimer, Service de Neurologie C Bron France
| | - Christine Tranchant
- Service de Neurologie Hôpitaux Universitaires de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM‐U964/CNRS‐UMR7104/Université de Strasbourg, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg Strasbourg France
| | - David Grabli
- Sorbonne Université Paris, France; Inserm U1127, CNRS UMR 7225, UM 75, ICM Paris France
- Assistance Publique‐Hôpitaux de Paris, Centre d'Investigation Clinique Neurosciences, Hôpital Pitié‐Salpêtrière, Paris, France; Department of Neurology Groupe Hospitalier Pitié‐Salpêtrière Paris France
| | - Bertrand Degos
- Assistance Publique‐Hôpitaux de Paris, Department of Neurology Hôpital Avicennes Bobigny France
| | - Jean‐Christophe Corvol
- Assistance Publique‐Hôpitaux de Paris, Centre d'Investigation Clinique Neurosciences, Hôpital Pitié‐Salpêtrière, Paris, France; Department of Neurology Groupe Hospitalier Pitié‐Salpêtrière Paris France
| | | | | | - Jean‐Luc Houeto
- Service de Neurologie, CIC‐INSERM 1402, CHU de Poitiers Poitiers France
| | - Adrian Degardin
- Department of Neurology Centre hospitalier de Tourcoing Tourcoing France
| | - Luc Defebvre
- Université de Lille, CHU Lille, INSERM, U1171–Degenerative & Vascular Cognitive Disorders, Lille, France; Lille Centre of Excellence for Neurodegenerative Diseases (LiCEND) Lille France
| | - Romain Valabrègue
- Sorbonne Université Paris, France; Inserm U1127, CNRS UMR 7225, UM 75, ICM Paris France
- Centre de NeuroImagerie de Recherche (CENIR) Sorbonne Université, UMR S 975, CNRS UMR 7225, ICM Paris France
| | - Marie Vidailhet
- Sorbonne Université Paris, France; Inserm U1127, CNRS UMR 7225, UM 75, ICM Paris France
- Assistance Publique‐Hôpitaux de Paris, Centre d'Investigation Clinique Neurosciences, Hôpital Pitié‐Salpêtrière, Paris, France; Department of Neurology Groupe Hospitalier Pitié‐Salpêtrière Paris France
| | - Pierre Pouget
- Sorbonne Université Paris, France; Inserm U1127, CNRS UMR 7225, UM 75, ICM Paris France
| | - Emmanuel Roze
- Sorbonne Université Paris, France; Inserm U1127, CNRS UMR 7225, UM 75, ICM Paris France
- Assistance Publique‐Hôpitaux de Paris, Centre d'Investigation Clinique Neurosciences, Hôpital Pitié‐Salpêtrière, Paris, France; Department of Neurology Groupe Hospitalier Pitié‐Salpêtrière Paris France
| | - Yulia Worbe
- Sorbonne Université Paris, France; Inserm U1127, CNRS UMR 7225, UM 75, ICM Paris France
- Department of Neurophysiology Saint‐Antoine Hospital, Assistance Publique‐Hôpitaux de Paris Paris France
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19
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Song Y, Zhang TJ, Li Y, Gao Y. Application of real-time shear wave elastography in the assessment of torsional cervical dystonia. Quant Imaging Med Surg 2019; 9:662-670. [PMID: 31143657 DOI: 10.21037/qims.2019.04.08] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background This study aimed to investigate the value of real-time shear wave elastography (SWE) in the assessment of torsional cervical dystonia (TCD). Methods Ninety healthy volunteers and 30 TCD patients were recruited, and elastography was performed at musculi sternocleidomastoideus (MSD) and musculi splenius capitis (MSC). Mean shear elastic modulus of right MSD and MSC in healthy controls and bilateral MSD and MSC in TCD patients was determined. The thickness of MSD and MSC of affected muscles was measured in TCD patients. Results In TCD patients, the mean shear elastic modulus of affected MSD and MSC was significantly higher than that of corresponding normal muscles (P<0.01) and that of controls (P<0.01). The diagnostic threshold was 24.9 kPa for MSD and 25.07 kPa for MSC (for MSD and MSC, the area under ROC was 0.979 and 0.979, with a sensitivity of 90% and 91.3%, and a specificity of 95.6% and 96.7%, respectively). The elastic modulus of neither affected nor normal MSD and MSC was significantly related to age and body mass index (P>0.05). The shear elastic modulus of affected MSD and MSC was positively related to the peak electromyography (r=0.83-0.73, P<0.01). The thickness of affected MSD and MSC was significantly thicker than that of corresponding normal muscles in TCD patients (P<0.01). Conclusions Real-time SWE can identify the difference in shear elastic modulus of MSD and MSC between the affected and normal side in TCD patients, indicating important diagnostic value in the assessment of muscular status for these patients.
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Affiliation(s)
- Ye Song
- Department of Ultrasonography, Zhoupu Hospital, Shanghai University of Medicine & Health Sciences, College of Medical Imaging, Shanghai 201318, China
| | - Tian-Jie Zhang
- Shanghai Huapukang Pediatric Clinic, Shanghai 310105, China
| | - Yuan Li
- Department of Ultrasonography, Zhoupu Hospital, Shanghai University of Medicine & Health Sciences, College of Medical Imaging, Shanghai 201318, China
| | - Yuan Gao
- Department of Surgery, Tongji Hospital of Tongji University, Shanghai 200065, China
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20
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Beck RB, Kneafsey SL, Narasimham S, O’Riordan S, Isa T, Hutchinson M, Reilly RB. Reduced Frequency of Ipsilateral Express Saccades in Cervical Dystonia: Probing the Nigro-Tectal Pathway. Tremor Other Hyperkinet Mov (N Y) 2018; 8:592. [PMID: 30510845 PMCID: PMC6262171 DOI: 10.7916/d8864094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 10/02/2018] [Indexed: 12/01/2022] Open
Abstract
Background Cervical dystonia is a hyperkinetic movement disorder of unknown cause. Symptoms of cervical dystonia have been induced in animals in which the integrity of the nigro-tectal pathway is disrupted, resulting in reduced inhibition of the deep layers of the superior colliculus. This same pathway is believed to play a critical role in saccade generation, particularly visually guided, express saccades. It was hypothesized that individuals with cervical dystonia would present with a higher frequency of express saccades and more directional errors. Methods Eight individuals with cervical dystonia and 11 age- and sex-matched control participants performed three saccadic paradigms: pro-saccade, gap, and anti-saccade (120 trials per task). Eye movements were recorded using electro-oculography. Results Mean saccadic reaction times were slower in the cervical dystonia group (only statistically significant in the anti-saccade task, F(1, 35) = 4.76, p = 0.036); participants with cervical dystonia produced fewer directional errors (mean 14% vs. 22%) in the anti-saccade task; and had similar frequencies of express saccades in the gap task relative to our control population (chi-square = 1.13, p = 0.287). All cervical dystonia participants had lower frequencies of express saccades ipsilateral to their dystonic side (the side to which their head turns), (chi-square = 3.57, p = 0.059). Discussion The finding of slower saccadic reaction times in cervical dystonia does not support the concept of reduced inhibition in the nigro-tectal pathway. Further research is required to confirm the observed relationship between the lateralization of lower frequencies of express saccades and direction of head rotation in cervical dystonia.
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Affiliation(s)
- Rebecca B. Beck
- School of Engineering, Trinity College Dublin, The University of Dublin, Dublin, IE
- Trinity Centre for BioEngineering, Trinity College Dublin, The University of Dublin, IE
| | - Simone L. Kneafsey
- School of Engineering, Trinity College Dublin, The University of Dublin, Dublin, IE
- Trinity Centre for BioEngineering, Trinity College Dublin, The University of Dublin, IE
| | - Shruti Narasimham
- School of Engineering, Trinity College Dublin, The University of Dublin, Dublin, IE
- Trinity Centre for BioEngineering, Trinity College Dublin, The University of Dublin, IE
| | - Sean O’Riordan
- Department of Neurology, St. Vincent’s University Hospital, Dublin, IE
- School of Medicine and Medical Sciences, University College DublinIE
| | - Tadashi Isa
- Department of Neuroscience, Kyoto University, Kyoto, JP
| | - Michael Hutchinson
- Department of Neurology, St. Vincent’s University Hospital, Dublin, IE
- School of Medicine and Medical Sciences, University College DublinIE
| | - Richard B. Reilly
- School of Engineering, Trinity College Dublin, The University of Dublin, Dublin, IE
- Trinity Centre for BioEngineering, Trinity College Dublin, The University of Dublin, IE
- School of Medicine, Trinity College Dublin, The University of Dublin, Dublin, IE
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21
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Loureiro JR, Himmelbach M, Ethofer T, Pohmann R, Martin P, Bause J, Grodd W, Scheffler K, Hagberg GE. In-vivo quantitative structural imaging of the human midbrain and the superior colliculus at 9.4T. Neuroimage 2018; 177:117-128. [PMID: 29729391 DOI: 10.1016/j.neuroimage.2018.04.071] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 03/29/2018] [Accepted: 04/30/2018] [Indexed: 01/24/2023] Open
Abstract
We explored anatomical details of the superior colliculus (SC) by in vivo magnetic resonance imaging (MRI) at 9.4T. The high signal-to-noise ratio allowed the acquisition of high resolution, multi-modal images with voxel sizes ranging between 176 × 132 × 600 μm and (800)3μm. Quantitative mapping of the longitudinal relaxation rate R1, the effective transverse relaxation rate R2*, and the magnetic susceptibility QSM was performed in 14 healthy volunteers. The images were analyzed in native space as well as after normalization to a common brain space (MNI). The coefficient-of-variation (CoV) across subjects was evaluated in prominent regions of the midbrain, reaching the best reproducibility (CoV of 5%) in the R2* maps of the SC in MNI space, while the CoV in the QSM maps remained high regardless of brain-space. To investigate whether more complex neurobiological architectural features could be detected, depth profiles through the SC layers towards the red nucleus (RN) were evaluated at different levels of the SC along the rostro-caudal axis. This analysis revealed alterations of the quantitative MRI parameters concordant with previous post mortem histology studies of the cyto- and myeloarchitecture of the SC. In general, the R1 maps were hyperintense in areas characterized by the presence of abundant myelinated fibers, and likely enabled detection of the deep white layer VII of the SC adjacent to the periaqueductal gray. While R1 maps failed to reveal finer details, possibly due to the relatively coarse spatial sampling used for this modality, these could be recovered in R2* maps and in QSM. In the central part of the SC along its rostro-caudal axis, increased R2* values and decreased susceptibility values were observed 2 mm below the SC surface, likely reflecting the myelinated fibers in the superficial optic layer (layer III). Towards the deeper layers, a second increase in R2* was paralleled by a paramagnetic shift in QSM suggesting the presence of an iron-rich layer about 3 mm below the surface of the SC, attributed to the intermediate gray layer (IV) composed of multipolar neurons. These results dovetail observations in histological specimens and animal studies and demonstrate that high-resolution multi-modal MRI at 9.4T can reveal several microstructural features of the SC in vivo.
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Affiliation(s)
- Joana R Loureiro
- High Field Magnetic Resonance Max Planck Institute for Biological Cybernetics, Tübingen, Germany; Institute for Biomedical Magnetic Resonance, Eberhard Karl's University, Tübingen and University Hospital Tübingen, Germany; Division of Neuropsychology, Centre for Neurology, Hertie-Institute for Clinical Brain Research, Germany; Centre for Integrative Neurosciences, Eberhard Karl's University, Tübingen, Germany
| | - Marc Himmelbach
- Division of Neuropsychology, Centre for Neurology, Hertie-Institute for Clinical Brain Research, Germany
| | - Thomas Ethofer
- Institute for Biomedical Magnetic Resonance, Eberhard Karl's University, Tübingen and University Hospital Tübingen, Germany; Department of General Psychiatry and Psychotherapy, Eberhard Karl's University, Tübingen and University Hospital Tübingen, Germany; Centre for Integrative Neurosciences, Eberhard Karl's University, Tübingen, Germany
| | - Rolf Pohmann
- High Field Magnetic Resonance Max Planck Institute for Biological Cybernetics, Tübingen, Germany
| | - Pascal Martin
- Department of General Psychiatry and Psychotherapy, Eberhard Karl's University, Tübingen and University Hospital Tübingen, Germany
| | - Jonas Bause
- High Field Magnetic Resonance Max Planck Institute for Biological Cybernetics, Tübingen, Germany
| | - Wolfgang Grodd
- High Field Magnetic Resonance Max Planck Institute for Biological Cybernetics, Tübingen, Germany
| | - Klaus Scheffler
- High Field Magnetic Resonance Max Planck Institute for Biological Cybernetics, Tübingen, Germany; Institute for Biomedical Magnetic Resonance, Eberhard Karl's University, Tübingen and University Hospital Tübingen, Germany; Centre for Integrative Neurosciences, Eberhard Karl's University, Tübingen, Germany
| | - Gisela E Hagberg
- High Field Magnetic Resonance Max Planck Institute for Biological Cybernetics, Tübingen, Germany; Institute for Biomedical Magnetic Resonance, Eberhard Karl's University, Tübingen and University Hospital Tübingen, Germany.
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22
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Kim JY, Lee JS, Hwang HS, Lee DR, Park CY, Jung SJ, You YR, Kim DS, Kim DW. Wnt signal activation induces midbrain specification through direct binding of the beta-catenin/TCF4 complex to the EN1 promoter in human pluripotent stem cells. Exp Mol Med 2018; 50:1-13. [PMID: 29650976 PMCID: PMC5938028 DOI: 10.1038/s12276-018-0044-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/30/2017] [Accepted: 12/19/2017] [Indexed: 12/12/2022] Open
Abstract
The canonical Wnt signal pathway plays a pivotal role in anteroposterior patterning and midbrain specification during early neurogenesis. Activating Wnt signal has been a strategy for differentiating human pluripotent stem cells (PSCs) into midbrain dopaminergic (DA) neurons; however, the underlying molecular mechanism(s) of how the Wnt signal drives posterior fate remained unclear. In this study, we found that activating the canonical Wnt signal significantly upregulated the expression of EN1, a midbrain-specific marker, in a fibroblast growth factor signal-dependent manner in human PSC-derived neural precursor cells (NPCs). The EN1 promoter region contains a putative TCF4-binding site that directly interacts with the β-catenin/TCF complex upon Wnt signal activation. Once differentiated, NPCs treated with a Wnt signal agonist gave rise to functional midbrain neurons including glutamatergic, GABAergic, and DA neurons. Our results provide a potential molecular mechanism that underlies midbrain specification of human PSC-derived NPCs by Wnt activation, as well as a differentiation paradigm for generating human midbrain neurons that may serve as a cellular platform for studying the ontogenesis of midbrain neurons and neurological diseases relevant to the midbrain.
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Affiliation(s)
- Ji Young Kim
- Department of Physiology, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul, 03722, Korea.,Brain Korea 21 PLUS Program for Medical Science, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea
| | - Jae Souk Lee
- Department of Physiology, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul, 03722, Korea.,Brain Korea 21 PLUS Program for Medical Science, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea
| | - Hyun Sub Hwang
- Department of Physiology, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul, 03722, Korea
| | - Dongjin R Lee
- Department of Physiology, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul, 03722, Korea
| | - Chul-Yong Park
- Department of Physiology, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul, 03722, Korea
| | - Sung Jun Jung
- Department of Physiology, College of Medicine, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, Korea
| | - Young Rang You
- Department of Biotechnology, Brain Korea 21 PLUS program for Biotechnology, College of Life Science & Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea
| | - Dae-Sung Kim
- Department of Biotechnology, Brain Korea 21 PLUS program for Biotechnology, College of Life Science & Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea.
| | - Dong-Wook Kim
- Department of Physiology, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul, 03722, Korea. .,Brain Korea 21 PLUS Program for Medical Science, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea.
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23
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Beck RB, McGovern EM, Butler JS, Birsanu D, Quinlivan B, Beiser I, Narasimham S, O'Riordan S, Hutchinson M, Reilly RB. Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia. J Vis Exp 2018. [PMID: 29443021 DOI: 10.3791/56310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The temporal discrimination threshold (TDT) is the shortest time interval at which an observer can discriminate two sequential stimuli as being asynchronous (typically 30-50 ms). It has been shown to be abnormal (prolonged) in neurological disorders, including cervical dystonia, a phenotype of adult onset idiopathic isolated focal dystonia. The TDT is a quantitative measure of the ability to perceive rapid changes in the environment and is considered indicative of the behavior of the visual neurons in the superior colliculus, a key node in covert attentional orienting. This article sets out methods for measuring the TDT (including two hardware options and two modes of stimuli presentation). We also explore two approaches of data analysis and TDT calculation. The application of the assessment of temporal discrimination to the understanding of the pathogenesis of cervical dystonia and adult onset idiopathic isolated focal dystonia is also discussed.
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Affiliation(s)
- Rebecca B Beck
- School of Engineering, Trinity College Dublin, The University of Dublin;
| | - Eavan M McGovern
- School of Engineering, Trinity College Dublin, The University of Dublin; Department of Neurology, St. Vincent's University Hospital; School of Medicine and Medical Sciences, University College Dublin
| | - John S Butler
- School of Mathematical Sciences, Dublin Institute of Technology
| | - Dorina Birsanu
- School of Engineering, Trinity College Dublin, The University of Dublin
| | - Brendan Quinlivan
- School of Engineering, Trinity College Dublin, The University of Dublin
| | - Ines Beiser
- School of Engineering, Trinity College Dublin, The University of Dublin; Department of Neurology, St. Vincent's University Hospital; School of Medicine and Medical Sciences, University College Dublin
| | - Shruti Narasimham
- School of Engineering, Trinity College Dublin, The University of Dublin
| | - Sean O'Riordan
- Department of Neurology, St. Vincent's University Hospital; School of Medicine and Medical Sciences, University College Dublin
| | - Michael Hutchinson
- Department of Neurology, St. Vincent's University Hospital; School of Medicine and Medical Sciences, University College Dublin
| | - Richard B Reilly
- School of Engineering, Trinity College Dublin, The University of Dublin; School of Medicine Trinity College Dublin, The University of Dublin
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24
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Hutchinson M, McGovern EM, Narasimham S, Beck R, Reilly RB, Walsh CD, Malone KM, Tijssen MAJ, O'Riordan S. The premotor syndrome of cervical dystonia: Disordered processing of salient environmental stimuli. Mov Disord 2017; 33:232-237. [PMID: 29205495 DOI: 10.1002/mds.27229] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 09/19/2017] [Accepted: 10/06/2017] [Indexed: 12/17/2022] Open
Affiliation(s)
- Michael Hutchinson
- Department of Neurology, St. Vincent's University Hospital, Dublin, Ireland.,School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland
| | - Eavan M McGovern
- Department of Neurology, St. Vincent's University Hospital, Dublin, Ireland.,School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland
| | - Shruti Narasimham
- Trinity Centre for Bioengineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Rebecca Beck
- Trinity Centre for Bioengineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Richard B Reilly
- Trinity Centre for Bioengineering, School of Engineering, Trinity College Dublin, Dublin, Ireland.,School of Medicine Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Cathal D Walsh
- Department of Mathematics and Statistics, University of Limerick, Limerick, Ireland
| | - Kevin M Malone
- School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland.,Department of Psychiatry, School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland
| | - Marina A J Tijssen
- Department of Neurology, University Medical Center Groningen, Groningen, The Netherlands
| | - Sean O'Riordan
- Department of Neurology, St. Vincent's University Hospital, Dublin, Ireland.,School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland
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25
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Disrupted superior collicular activity may reveal cervical dystonia disease pathomechanisms. Sci Rep 2017; 7:16753. [PMID: 29196716 PMCID: PMC5711841 DOI: 10.1038/s41598-017-17074-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 11/21/2017] [Indexed: 11/13/2022] Open
Abstract
Cervical dystonia is a common neurological movement disorder characterised by muscle contractions causing abnormal movements and postures affecting the head and neck. The neural networks underpinning this condition are incompletely understood. While animal models suggest a role for the superior colliculus in its pathophysiology, this link has yet to be established in humans. The present experiment was designed to test the hypothesis that disrupted superior collicular processing is evident in affected patients and in relatives harbouring a disease-specific endophenotype (abnormal temporal discrimination). The study participants were 16 cervical dystonia patients, 16 unaffected first-degree relatives with abnormal temporal discrimination, 16 unaffected first-degree relatives with normal temporal discrimination and 16 healthy controls. The response of participant’s superior colliculi to looming stimuli was assessed by functional magnetic resonance imaging. Cervical dystonia patients and relatives with abnormal temporal discrimination demonstrated (i) significantly reduced superior collicular activation for whole brain and region of interest analysis; (ii) a statistically significant negative correlation between temporal discrimination threshold and superior collicular peak values. Our results support the hypothesis that disrupted superior collicular processing is involved in the pathogenesis of cervical dystonia. These findings, which align with animal models of cervical dystonia, shed new light on pathomechanisms in humans.
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26
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Conte A, McGovern EM, Narasimham S, Beck R, Killian O, O'Riordan S, Reilly RB, Hutchinson M. Temporal Discrimination: Mechanisms and Relevance to Adult-Onset Dystonia. Front Neurol 2017; 8:625. [PMID: 29234300 PMCID: PMC5712317 DOI: 10.3389/fneur.2017.00625] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 11/07/2017] [Indexed: 12/05/2022] Open
Abstract
Temporal discrimination is the ability to determine that two sequential sensory stimuli are separated in time. For any individual, the temporal discrimination threshold (TDT) is the minimum interval at which paired sequential stimuli are perceived as being asynchronous; this can be assessed, with high test–retest and inter-rater reliability, using a simple psychophysical test. Temporal discrimination is disordered in a number of basal ganglia diseases including adult-onset dystonia, of which the two most common phenotypes are cervical dystonia and blepharospasm. The causes of adult-onset focal dystonia are unknown; genetic, epigenetic, and environmental factors are relevant. Abnormal TDTs in adult-onset dystonia are associated with structural and neurophysiological changes considered to reflect defective inhibitory interneuronal processing within a network which includes the superior colliculus, basal ganglia, and primary somatosensory cortex. It is hypothesized that abnormal temporal discrimination is a mediational endophenotype and, when present in unaffected relatives of patients with adult-onset dystonia, indicates non-manifesting gene carriage. Using the mediational endophenotype concept, etiological factors in adult-onset dystonia may be examined including (i) the role of environmental exposures in disease penetrance and expression; (ii) sexual dimorphism in sex ratios at age of onset; (iii) the pathogenesis of non-motor symptoms of adult-onset dystonia; and (iv) subcortical mechanisms in disease pathogenesis.
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Affiliation(s)
- Antonella Conte
- Department of Neurology and Psychiatry, Sapienza, University of Rome, Rome, Italy.,IRCCS Neuromed, Pozzilli, Isernia, Italy
| | - Eavan M McGovern
- Department of Neurology, St Vincent's University Hospital Dublin, Dublin, Ireland.,School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
| | - Shruti Narasimham
- Trinity Centre for Bioengineering, Trinity College, The University of Dublin, Dublin, Ireland.,School of Medicine, Trinity College, The University of Dublin, Dublin, Ireland.,School of Engineering, Trinity College, The University of Dublin, Dublin, Ireland
| | - Rebecca Beck
- Trinity Centre for Bioengineering, Trinity College, The University of Dublin, Dublin, Ireland.,School of Medicine, Trinity College, The University of Dublin, Dublin, Ireland.,School of Engineering, Trinity College, The University of Dublin, Dublin, Ireland
| | - Owen Killian
- Trinity Centre for Bioengineering, Trinity College, The University of Dublin, Dublin, Ireland.,School of Medicine, Trinity College, The University of Dublin, Dublin, Ireland.,School of Engineering, Trinity College, The University of Dublin, Dublin, Ireland
| | - Sean O'Riordan
- Department of Neurology, St Vincent's University Hospital Dublin, Dublin, Ireland.,School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
| | - Richard B Reilly
- Trinity Centre for Bioengineering, Trinity College, The University of Dublin, Dublin, Ireland.,School of Medicine, Trinity College, The University of Dublin, Dublin, Ireland.,School of Engineering, Trinity College, The University of Dublin, Dublin, Ireland
| | - Michael Hutchinson
- Department of Neurology, St Vincent's University Hospital Dublin, Dublin, Ireland.,School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
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Endophenotyping in idiopathic adult onset cervical dystonia. Clin Neurophysiol 2017; 128:1142-1147. [DOI: 10.1016/j.clinph.2017.04.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 04/09/2017] [Accepted: 04/10/2017] [Indexed: 02/07/2023]
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Mc Govern EM, O'Connor E, Beiser I, Williams L, Butler JS, Quinlivan B, Narasimham S, Beck R, Reilly RB, O'Riordan S, Hutchinson M. Menstrual cycle and the temporal discrimination threshold. Physiol Meas 2017; 38:N65-N72. [PMID: 28099161 DOI: 10.1088/1361-6579/38/2/n65] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The temporal discrimination threshold (TDT) is a proposed pre-clinical biomarker (endophenotype) for adult onset isolated focal dystonia (AOIFD). Age- and sex-related effects on temporal discrimination demonstrate that women, before the age of 40 years, have faster temporal discrimination than men but their TDTs worsen with age at almost three times the rate of men. Thus after 40 years the TDT in women is progressively worse than in men. AOIFD is an increasingly female-predominant disorder after the age of 40; it is not clear whether this age-related sexually-dimorphic difference observed for both the TDT and sex ratio at disease onset in AOIFD is a hormonal or chromosomal effect. The aim of this study was to examine temporal discrimination at weekly intervals during two consecutive menstrual cycles in 14 healthy female volunteers to determine whether physiological hormonal changes affected temporal discrimination. We observed no significant differences in weekly temporal discrimination threshold values during the menstrual cycles and no significant correlation with the menstrual cycle stage. This observed stability of temporal discrimination during cyclical hormonal change raises interesting questions concerning the age-related sexually-dimorphic decline observed in temporal discrimination. Our findings pave the way for future studies exploring potential pathomechanisms for this age-related deterioration.
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Affiliation(s)
- Eavan M Mc Govern
- Department of Neurology, St. Vincent's University Hospital, Dublin, Ireland. School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland. Trinity Centre for Bioengineering, Dublin, Ireland
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Association Analysis of NALCN Polymorphisms rs1338041 and rs61973742 in a Chinese Population with Isolated Cervical Dystonia. PARKINSONS DISEASE 2016; 2016:9281790. [PMID: 27239368 PMCID: PMC4864546 DOI: 10.1155/2016/9281790] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 03/08/2016] [Accepted: 04/06/2016] [Indexed: 02/05/2023]
Abstract
Background. A genome-wide association study (GWAS) demonstrated a possible association between cervical dystonia (CD) and a sodium leak channel, nonselective (NALCN) gene. However, the association between NALCN and CD was largely unknown in Asian population. The present study was carried out to examine the associations between the two single nucleotide polymorphisms (SNPs) rs1338041 and rs61973742 in the NALCN gene and CD in a Chinese population. Methods. In a cohort of 201 patients with isolated CD, we genotyped the two SNPs rs1338041 and rs61973742 using polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP). We also included 289 unrelated, age- and sex-matched healthy controls (HCs) from the same region. Result. No significant differences were observed in either the genotype distributions or the minor allele frequencies (MAFs) of the two SNPs between the CD patients and the HCs. There were no significant differences between early-onset and late-onset CD patients, between patients with and without a positive family history of dystonia, or between patients with and without tremor or sensory tricks. Conclusion. Lack of association between the SNPs of NALCN and CD suggests that the SNPs of NALCN do not play a role in CD in a Chinese population.
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Butler JS, Beiser IM, Williams L, McGovern E, Molloy F, Lynch T, Healy DG, Moore H, Walsh R, Reilly RB, O'Riordan S, Walsh C, Hutchinson M. Age-Related Sexual Dimorphism in Temporal Discrimination and in Adult-Onset Dystonia Suggests GABAergic Mechanisms. Front Neurol 2015; 6:258. [PMID: 26696957 PMCID: PMC4677337 DOI: 10.3389/fneur.2015.00258] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 11/23/2015] [Indexed: 12/04/2022] Open
Abstract
Background Adult-onset isolated focal dystonia (AOIFD) presenting in early adult life is more frequent in men, whereas in middle age it is female predominant. Temporal discrimination, an endophenotype of adult-onset idiopathic isolated focal dystonia, shows evidence of sexual dimorphism in healthy participants. Objectives We assessed the distinctive features of age-related sexual dimorphism of (i) sex ratios in dystonia phenotypes and (ii) sexual dimorphism in temporal discrimination in unaffected relatives of cervical dystonia patients. Methods We performed (i) a meta-regression analysis of the proportion of men in published cohorts of phenotypes of adult-onset dystonia in relation to their mean age of onset and (ii) an analysis of temporal discrimination thresholds in 220 unaffected first-degree relatives (125 women) of cervical dystonia patients. Results In 53 studies of dystonia phenotypes, the proportion of men showed a highly significant negative association with mean age of onset (p < 0.0001, pseudo-R2 = 59.6%), with increasing female predominance from 40 years of age. Age of onset and phenotype together explained 92.8% of the variance in proportion of men. Temporal discrimination in relatives under the age of 35 years is faster in women than men but the age-related rate of deterioration in women is twice that of men; after 45 years of age, men have faster temporal discrimination than women. Conclusion Temporal discrimination in unaffected relatives of cervical dystonia patients and sex ratios in adult-onset dystonia phenotypes show similar patterns of age-related sexual dimorphism. Such age-related sexual dimorphism in temporal discrimination and adult-onset focal dystonia may reflect common underlying mechanisms. Cerebral GABA levels have been reported to show similar age-related sexual dimorphism in healthy participants and may be the mechanism underlying the observed age-related sexual dimorphism in temporal discrimination and the sex ratios in AOIFD.
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Affiliation(s)
- John S Butler
- Trinity Centre for Bioengineering, School of Engineering, Trinity College Dublin , Dublin , Ireland
| | - Ines M Beiser
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland
| | - Laura Williams
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland
| | - Eavan McGovern
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland
| | | | - Tim Lynch
- Dublin Neurological Institute, Mater Misericordiae University Hospital , Dublin , Ireland
| | | | | | | | - Richard B Reilly
- Trinity Centre for Bioengineering, School of Engineering, Trinity College Dublin , Dublin , Ireland ; School of Medicine, Trinity College Dublin , Dublin , Ireland
| | - Seán O'Riordan
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland
| | - Cathal Walsh
- Department of Statistics, Trinity College Dublin , Dublin , Ireland ; Department of Mathematics and Statistics, University of Limerick , Limerick , Ireland
| | - Michael Hutchinson
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland
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Løkkegaard A, Herz DM, Haagensen BN, Lorentzen AK, Eickhoff SB, Siebner HR. Altered sensorimotor activation patterns in idiopathic dystonia-an activation likelihood estimation meta-analysis of functional brain imaging studies. Hum Brain Mapp 2015; 37:547-57. [PMID: 26549606 PMCID: PMC4738472 DOI: 10.1002/hbm.23050] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 09/17/2015] [Accepted: 10/23/2015] [Indexed: 11/24/2022] Open
Abstract
Dystonia is characterized by sustained or intermittent muscle contractions causing abnormal, often repetitive, movements or postures. Functional neuroimaging studies have yielded abnormal task‐related sensorimotor activation in dystonia, but the results appear to be rather variable across studies. Further, study size was usually small including different types of dystonia. Here we performed an activation likelihood estimation (ALE) meta‐analysis of functional neuroimaging studies in patients with primary dystonia to test for convergence of dystonia‐related alterations in task‐related activity across studies. Activation likelihood estimates were based on previously reported regional maxima of task‐related increases or decreases in dystonia patients compared to healthy controls. The meta‐analyses encompassed data from 179 patients with dystonia reported in 18 functional neuroimaging studies using a range of sensorimotor tasks. Patients with dystonia showed bilateral increases in task‐related activation in the parietal operculum and ventral postcentral gyrus as well as right middle temporal gyrus. Decreases in task‐related activation converged in left supplementary motor area and left postcentral gyrus, right superior temporal gyrus and dorsal midbrain. Apart from the midbrain cluster, all between‐group differences in task‐related activity were retrieved in a sub‐analysis including only the 14 studies on patients with focal dystonia. For focal dystonia, an additional cluster of increased sensorimotor activation emerged in the caudal cingulate motor zone. The results show that dystonia is consistently associated with abnormal somatosensory processing in the primary and secondary somatosensory cortex along with abnormal sensorimotor activation of mesial premotor and right lateral temporal cortex. Hum Brain Mapp 37:547–557, 2016. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Annemette Løkkegaard
- Department of NeurologyCopenhagen University Hospital BispebjergCopenhagenDenmark
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and ResearchCopenhagen University Hospital HvidovreHvidovreDenmark
| | - Damian M. Herz
- Department of NeurologyCopenhagen University Hospital BispebjergCopenhagenDenmark
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and ResearchCopenhagen University Hospital HvidovreHvidovreDenmark
| | - Brian N. Haagensen
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and ResearchCopenhagen University Hospital HvidovreHvidovreDenmark
| | - Anne K. Lorentzen
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and ResearchCopenhagen University Hospital HvidovreHvidovreDenmark
| | - Simon B. Eickhoff
- Institute of Neuroscience and Medicine (INM‐1), Research Center JülichGermany
- Institute of Clinical Neuroscience and Medical Psychology, Heinrich‐Heine University DüsseldorfGermany
| | - Hartwig R. Siebner
- Department of NeurologyCopenhagen University Hospital BispebjergCopenhagenDenmark
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and ResearchCopenhagen University Hospital HvidovreHvidovreDenmark
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Williams LJ, Butler JS, Molloy A, McGovern E, Beiser I, Kimmich O, Quinlivan B, O'Riordan S, Hutchinson M, Reilly RB. Young Women do it Better: Sexual Dimorphism in Temporal Discrimination. Front Neurol 2015. [PMID: 26217303 PMCID: PMC4497309 DOI: 10.3389/fneur.2015.00160] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The temporal discrimination threshold (TDT) is the shortest time interval at which two sensory stimuli presented sequentially are detected as asynchronous by the observer. TDTs are known to increase with age. Having previously observed shorter thresholds in young women than in men, in this work we sought to systematically examine the effect of sex and age on temporal discrimination. The aims of this study were to examine, in a large group of men and women aged 20–65 years, the distribution of TDTs with an analysis of the individual participant’s responses, assessing the “point of subjective equality” and the “just noticeable difference” (JND). These respectively assess sensitivity and accuracy of an individual’s response. In 175 participants (88 women) aged 20–65 years, temporal discrimination was faster in women than in men under the age of 40 years by a mean of approximately 13 ms. However, age-related decline in temporal discrimination was three times faster in women so that, in the age group of 40–65 years, the female superiority was reversed. The point of subjective equality showed a similar advantage in younger women and more marked age-related decline in women than men, as the TDT. JND values declined equally in both sexes, showing no sexual dimorphism. This observed sexual dimorphism in temporal discrimination is important for both (a) future clinical research assessing disordered mid-brain covert attention in basal-ganglia disorders, and (b) understanding the biology of this sexual dimorphism which may be genetic or hormonal.
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Affiliation(s)
- Laura Jane Williams
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Science, University College Dublin , Dublin , Ireland
| | - John S Butler
- Trinity Centre for Bioengineering, Trinity College Dublin , Dublin , Ireland ; School of Engineering, Trinity College Dublin , Dublin , Ireland
| | - Anna Molloy
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Science, University College Dublin , Dublin , Ireland
| | - Eavan McGovern
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Science, University College Dublin , Dublin , Ireland
| | - Ines Beiser
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Science, University College Dublin , Dublin , Ireland
| | - Okka Kimmich
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Science, University College Dublin , Dublin , Ireland
| | - Brendan Quinlivan
- Trinity Centre for Bioengineering, Trinity College Dublin , Dublin , Ireland ; School of Engineering, Trinity College Dublin , Dublin , Ireland
| | - Sean O'Riordan
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Science, University College Dublin , Dublin , Ireland
| | - Michael Hutchinson
- Department of Neurology, St. Vincent's University Hospital , Dublin , Ireland ; School of Medicine and Medical Science, University College Dublin , Dublin , Ireland
| | - Richard B Reilly
- Trinity Centre for Bioengineering, Trinity College Dublin , Dublin , Ireland ; School of Engineering, Trinity College Dublin , Dublin , Ireland ; School of Medicine, Trinity College Dublin , Dublin , Ireland
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Butler JS, Molloy A, Williams L, Kimmich O, Quinlivan B, O'Riordan S, Hutchinson M, Reilly RB. Non-parametric bootstrapping method for measuring the temporal discrimination threshold for movement disorders. J Neural Eng 2015; 12:046026. [PMID: 26087478 DOI: 10.1088/1741-2560/12/4/046026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Recent studies have proposed that the temporal discrimination threshold (TDT), the shortest detectable time period between two stimuli, is a possible endophenotype for adult onset idiopathic isolated focal dystonia (AOIFD). Patients with AOIFD, the third most common movement disorder, and their first-degree relatives have been shown to have abnormal visual and tactile TDTs. For this reason it is important to fully characterize each participant's data. To date the TDT has only been reported as a single value. APPROACH Here, we fit individual participant data with a cumulative Gaussian to extract the mean and standard deviation of the distribution. The mean represents the point of subjective equality (PSE), the inter-stimulus interval at which participants are equally likely to respond that two stimuli are one stimulus (synchronous) or two different stimuli (asynchronous). The standard deviation represents the just noticeable difference (JND) which is how sensitive participants are to changes in temporal asynchrony around the PSE. We extended this method by submitting the data to a non-parametric bootstrapped analysis to get 95% confidence intervals on individual participant data. MAIN RESULTS Both the JND and PSE correlate with the TDT value but are independent of each other. Hence this suggests that they represent different facets of the TDT. Furthermore, we divided groups by age and compared the TDT, PSE, and JND values. The analysis revealed a statistical difference for the PSE which was only trending for the TDT. SIGNIFICANCE The analysis method will enable deeper analysis of the TDT to leverage subtle differences within and between control and patient groups, not apparent in the standard TDT measure.
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Affiliation(s)
- John S Butler
- Trinity Centre for Bioengineering, Trinity College Dublin, Dublin, Ireland. School of Engineering, Trinity College Dublin, Dublin, Ireland
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Goonetilleke SC, Katz L, Wood DK, Gu C, Huk AC, Corneil BD. Cross-species comparison of anticipatory and stimulus-driven neck muscle activity well before saccadic gaze shifts in humans and nonhuman primates. J Neurophysiol 2015; 114:902-13. [PMID: 26063777 DOI: 10.1152/jn.00230.2015] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 06/09/2015] [Indexed: 11/22/2022] Open
Abstract
Recent studies have described a phenomenon wherein the onset of a peripheral visual stimulus elicits short-latency (<100 ms) stimulus-locked recruitment (SLR) of neck muscles in nonhuman primates (NHPs), well before any saccadic gaze shift. The SLR is thought to arise from visual responses within the intermediate layers of the superior colliculus (SCi), hence neck muscle recordings may reflect presaccadic activity within the SCi, even in humans. We obtained bilateral intramuscular recordings from splenius capitis (SPL, an ipsilateral head-turning muscle) from 28 human subjects performing leftward or rightward visually guided eye-head gaze shifts. Evidence of an SLR was obtained in 16/55 (29%) of samples; we also observed examples where the SLR was present only unilaterally. We compared these human results with those recorded from a sample of eight NHPs from which recordings of both SPL and deeper suboccipital muscles were available. Using the same criteria, evidence of an SLR was obtained in 8/14 (57%) of SPL recordings, but in 26/29 (90%) of recordings from suboccipital muscles. Thus, both species-specific and muscle-specific factors contribute to the low SLR prevalence in human SPL. Regardless of the presence of the SLR, neck muscle activity in both human SPL and in NHPs became predictive of the reaction time of the ensuing saccade gaze shift ∼70 ms after target appearance; such pregaze recruitment likely reflects developing SCi activity, even if the tectoreticulospinal pathway does not reliably relay visually related activity to SPL in humans.
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Affiliation(s)
- Samanthi C Goonetilleke
- Department of Physiology & Pharmacology, University of Western Ontario, London, Ontario, Canada
| | - Leor Katz
- Center for Perceptual Systems and Institute for Neuroscience, The University of Texas at Austin, Austin, Texas
| | - Daniel K Wood
- Department of Neurobiology, Northwestern University, Evanston, Illinois
| | - Chao Gu
- Department of Psychology, University of Western Ontario, London, Ontario, Canada; Brain and Mind Institute, University of Western Ontario, London, Ontario, Canada; and
| | - Alexander C Huk
- Center for Perceptual Systems and Institute for Neuroscience, The University of Texas at Austin, Austin, Texas
| | - Brian D Corneil
- Department of Physiology & Pharmacology, University of Western Ontario, London, Ontario, Canada; Department of Psychology, University of Western Ontario, London, Ontario, Canada; Brain and Mind Institute, University of Western Ontario, London, Ontario, Canada; and Robarts Research Institute, London, Ontario, Canada
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Avanzino L, Fiorio M. Proprioceptive dysfunction in focal dystonia: from experimental evidence to rehabilitation strategies. Front Hum Neurosci 2014; 8:1000. [PMID: 25538612 PMCID: PMC4260499 DOI: 10.3389/fnhum.2014.01000] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 11/25/2014] [Indexed: 11/13/2022] Open
Abstract
Dystonia has historically been considered a disorder of the basal ganglia, mainly affecting planning and execution of voluntary movements. This notion comes from the observation that most lesions responsible for secondary dystonia involve the basal ganglia. However, what emerges from recent research is that dystonia is linked to the dysfunction of a complex neural network that comprises basal ganglia–thalamic–frontal cortex, but also the inferior parietal cortex and the cerebellum. While dystonia is clearly a motor problem, it turned out that sensory aspects are also fundamental, especially those related to proprioception. We outline experimental evidence for proprioceptive dysfunction in focal dystonia from intrinsic sensory abnormalities to impaired sensorimotor integration, which is the process by which sensory information is used to plan and execute volitional movements. Particularly, we will focus on proprioceptive aspects of dystonia, including: (i) processing of vibratory input, (ii) temporal discrimination of two passive movements, (iii) multimodal integration of visual-tactile and proprioceptive inputs, and (iv) motor control in the absence of visual feedback. We suggest that these investigations contribute not only to a better understanding of dystonia pathophysiology, but also to develop rehabilitation strategies aimed at facilitating the processing of proprioceptive input.
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Affiliation(s)
- Laura Avanzino
- Section of Human Physiology, Department of Experimental Medicine, Centro Polifunzionale di Scienze Motorie, University of Genoa , Genoa , Italy
| | - Mirta Fiorio
- Department of Neurological and Movement Sciences, University of Verona , Verona , Italy
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Gündüz A, Ergin H, Kızıltan ME. Long latency trigemino-cervical reflex in patients with cervical dystonia. Neurol Sci 2014; 36:103-8. [PMID: 25056194 DOI: 10.1007/s10072-014-1893-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 07/14/2014] [Indexed: 11/28/2022]
Abstract
Trigemino-cervical reflex (TCR) is elicited by stimulation of face using various modalities. TCR reflects the interaction between trigeminal system and cervical motoneurons. Such a specific interaction is assumed to play role in development of cervical dystonia (CD) through superior colliculus. In this study, we aimed to investigate alterations of the functional relationship between those structures in CD and in a subgroup with dystonic tremor. A total of consecutive 23 patients with primary CD (7 men, 16 women) and 16 age and sex matched control subjects (7 men, 9 women) were included in this study. TCR was obtained after percutaneous electrical stimulation (with duration of 0.5 ms) of infraorbital branch of trigeminal nerve while recording over splenius capitis and sternocleidomastoid muscles. Presence and onset latencies of TCR did not differ significantly between patients with CD and controls, and same pattern of muscle activation occurred in both groups. Responses of patient group seemed to have higher amplitudes and to be more persistent. There were no significant side-to-side differences of TCR probability, latency, amplitude or duration with respect to the side of head deviation in CD. Increased amplitudes and durations of responses probably reflect increased excitability of the reflex circuit. We suggest that similar latencies and response pattern in comparison to healthy individuals decrease the possibility of structural disturbance. TCR is probably under bilateral basal ganglia and dopaminergic control. Alterations of trigemino-cervical pathway are more extensive and are not solely due to local changes of brainstem interneurons.
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Affiliation(s)
- Ayşegül Gündüz
- Department of Neurology, Cerrahpasa Medical Faculty, Cerrahpasa School of Medicine, Istanbul University, K.M. Pasa, 34098, Istanbul, Turkey,
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Molloy A, Kimmich O, Williams L, Quinlivan B, Dabacan A, Fanning A, Butler JS, O’Riordan S, Reilly RB, Hutchinson M. A headset method for measuring the visual temporal discrimination threshold in cervical dystonia. Tremor Other Hyperkinet Mov (N Y) 2014; 4:249. [PMID: 25126450 PMCID: PMC4107229 DOI: 10.7916/d8td9vf6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 06/10/2014] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND The visual temporal discrimination threshold (TDT) is the shortest time interval at which one can determine two stimuli to be asynchronous and meets criteria for a valid endophenotype in adult-onset idiopathic focal dystonia, a poorly penetrant disorder. Temporal discrimination is assessed in the hospital laboratory; in unaffected relatives of multiplex adult-onset dystonia patients distance from the hospital is a barrier to data acquisition. We devised a portable headset method for visual temporal discrimination determination and our aim was to validate this portable tool against the traditional laboratory-based method in a group of patients and in a large cohort of healthy controls. METHODS Visual TDTs were examined in two groups 1) in 96 healthy control participants divided by age and gender, and 2) in 33 cervical dystonia patients, using two methods of data acquisition, the traditional table-top laboratory-based system, and the novel portable headset method. The order of assessment was randomized in the control group. The results obtained by each technique were compared. RESULTS Visual temporal discrimination in healthy control participants demonstrated similar age and gender effects by the headset method as found by the table-top examination. There were no significant differences between visual TDTs obtained using the two methods, both for the control participants and for the cervical dystonia patients. Bland-Altman testing showed good concordance between the two methods in both patients and in controls. DISCUSSION The portable headset device is a reliable and accurate method for visual temporal discrimination testing for use outside the laboratory, and will facilitate increased TDT data collection outside of the hospital setting. This is of particular importance in multiplex families where data collection in all available members of the pedigree is important for exome sequencing studies.
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Affiliation(s)
- Anna Molloy
- Department of Neurology, St Vincent's University Hospital, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | - Okka Kimmich
- Department of Neurology, St Vincent's University Hospital, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | - Laura Williams
- Department of Neurology, St Vincent's University Hospital, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | | | - Adriana Dabacan
- Trinity Centre for Bioengineering, Trinity College Dublin, Ireland
| | - Aisling Fanning
- Trinity Centre for Bioengineering, Trinity College Dublin, Ireland
| | - John S. Butler
- Trinity Centre for Bioengineering, Trinity College Dublin, Ireland
| | - Sean O’Riordan
- Department of Neurology, St Vincent's University Hospital, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
| | | | - Michael Hutchinson
- Department of Neurology, St Vincent's University Hospital, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin, Belfield, Dublin, Ireland
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