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Wei KC, Wang TG, Hsiao MY. The Cortical and Subcortical Neural Control of Swallowing: A Narrative Review. Dysphagia 2024; 39:177-197. [PMID: 37603047 DOI: 10.1007/s00455-023-10613-x] [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: 09/24/2022] [Accepted: 08/03/2023] [Indexed: 08/22/2023]
Abstract
Swallowing is a sophisticated process involving the precise and timely coordination of the central and peripheral nervous systems, along with the musculatures of the oral cavity, pharynx, and airway. The role of the infratentorial neural structure, including the swallowing central pattern generator and cranial nerve nuclei, has been described in greater detail compared with both the cortical and subcortical neural structures. Nonetheless, accumulated data from analysis of swallowing performance in patients with different neurological diseases and conditions, along with results from neurophysiological studies of normal swallowing have gradually enhanced understanding of the role of cortical and subcortical neural structures in swallowing, potentially leading to the development of treatment modalities for patients suffering from dysphagia. This review article summarizes findings about the role of both cortical and subcortical neural structures in swallowing based on results from neurophysiological studies and studies of various neurological diseases. In sum, cortical regions are mainly in charge of initiation and coordination of swallowing after receiving afferent information, while subcortical structures including basal ganglia and thalamus are responsible for movement control and regulation during swallowing through the cortico-basal ganglia-thalamo-cortical loop. This article also presents how cortical and subcortical neural structures interact with each other to generate the swallowing response. In addition, we provided the updated evidence about the clinical applications and efficacy of neuromodulation techniques, including both non-invasive brain stimulation and deep brain stimulation on dysphagia.
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Affiliation(s)
- Kuo-Chang Wei
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, No. 7, Zhongshan South Road, Zhongzheng District, Taipei, 100, Taiwan
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital Jinshan Branch, New Taipei City, Taiwan
| | - Tyng-Guey Wang
- Department of Physical Medicine and Rehabilitation, College of Medicine, National Taiwan University, No. 7, Zhongshan South Road, Zhongzheng District, Taipei, 100, Taiwan
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, No. 7, Zhongshan South Road, Zhongzheng District, Taipei, 100, Taiwan
| | - Ming-Yen Hsiao
- Department of Physical Medicine and Rehabilitation, College of Medicine, National Taiwan University, No. 7, Zhongshan South Road, Zhongzheng District, Taipei, 100, Taiwan.
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, No. 7, Zhongshan South Road, Zhongzheng District, Taipei, 100, Taiwan.
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2
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Garand KL(F, Armeson K, Hill EG, Blair J, Pearson W, Martin-Harris B. Quantifying Oropharyngeal Swallowing Impairment in Response to Bolus Viscosity. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2024; 33:460-467. [PMID: 37902448 PMCID: PMC11001168 DOI: 10.1044/2023_ajslp-23-00082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 08/28/2023] [Accepted: 09/10/2023] [Indexed: 10/31/2023]
Abstract
PURPOSE The purpose of this study was to test the feasibility for quantifying changes in oropharyngeal swallowing impairment in response to alteration in bolus viscosity using a reliable and valid method of observational measurement-the Modified Barium Swallow Impairment Profile (MBSImP). METHOD This retrospective analysis included a heterogeneous cohort of 119 patients with suspected dysphagia that underwent a videofluoroscopic swallowing study as part of clinical care. Using consensus scoring, two expert clinicians assigned MBSImP scores to components related to oropharyngeal swallowing function between two bolus viscosities (thin liquid and pudding): epiglottic movement, laryngeal elevation, anterior hyoid excursion, tongue base retraction, pharyngeal stripping wave, and pharyngoesophageal segment opening (PESO). Comparisons between the two bolus viscosities were investigated for each component. RESULTS Higher (worse) scores were observed in the thin-liquid trial compared with the pudding trial for the following MBSImP components: anterior hyoid excursion (p = .03), epiglottic movement (p < .001), pharyngeal stripping wave (p < .001), and PESO (p = .002). Lower (better) scores were observed in the liquid trial compared with the pudding trial for one component-tongue base retraction (Component 15) only (p < .001). CONCLUSION These findings provide further evidence for positive influences of viscosity on the swallow mechanism, including influences of sensory feedback on the sensorimotor swallow program.
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Affiliation(s)
| | - Kent Armeson
- Department of Public Health Sciences, Medical University of South Carolina, Charleston
| | - Elizabeth G. Hill
- Department of Public Health Sciences, Medical University of South Carolina, Charleston
| | - Julie Blair
- Evelyn Trammell Institute for Voice and Swallowing, Medical University of South Carolina, Charleston
| | - William Pearson
- Department of Biomedical Sciences (Anatomy), Edward Via College of Osteopathic Medicine, Auburn, AL
| | - Bonnie Martin-Harris
- Department of Communication Sciences Disorders, Northwestern University, Evanston, IL
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3
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Gross J, Junghöfer M, Wolters C. Bioelectromagnetism in Human Brain Research: New Applications, New Questions. Neuroscientist 2023; 29:62-77. [PMID: 34873945 PMCID: PMC9902961 DOI: 10.1177/10738584211054742] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Bioelectromagnetism has contributed some of the most commonly used techniques to human neuroscience such as magnetoencephalography (MEG), electroencephalography (EEG), transcranial magnetic stimulation (TMS), and transcranial electric stimulation (TES). The considerable differences in their technical design and practical use give rise to the impression that these are quite different techniques altogether. Here, we review, discuss and illustrate the fundamental principle of Helmholtz reciprocity that provides a common ground for all four techniques. We show that, more than 150 years after its discovery by Helmholtz in 1853, reciprocity is important to appreciate the strengths and limitations of these four classical tools in neuroscience. We build this case by explaining the concept of Helmholtz reciprocity, presenting a methodological account of this principle for all four methods and, finally, by illustrating its application in practical clinical studies.
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Affiliation(s)
- Joachim Gross
- Institute for Biomagnetism and Biosignalanalysis, University of Münster, Münster, Germany,Joachim Gross, Institute for Biomagnetism and Biosignalanalysis, University of Münster, Malmedyweg 15, Münster, 48149, Germany.
| | - Markus Junghöfer
- Institute for Biomagnetism and Biosignalanalysis, University of Münster, Münster, Germany
| | - Carsten Wolters
- Institute for Biomagnetism and Biosignalanalysis, University of Münster, Münster, Germany
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4
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Bhutada AM, Davis TM, Garand KL. Electrophysiological Measures of Swallowing Functions: A Systematic Review. Dysphagia 2022; 37:1633-1650. [PMID: 35218413 DOI: 10.1007/s00455-022-10426-4] [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: 07/27/2021] [Accepted: 02/14/2022] [Indexed: 12/16/2022]
Abstract
The purpose of this systematic review was to examine the application of event-related potentials (ERPs) to investigate neural processes of swallowing functions in adults with and without dysphagia. Computerized literature searches were performed from three search engines. Studies were screened using Covidence (Cochrane tool) and followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement standards (PRISMA-2009). A total of 759 studies were initially retrieved, of which 12 studies met inclusion criteria. Electrophysiological measures assessing swallowing functions were identified in two major ERP categories: (1) sensory potentials and (2) pre-motor potentials. Approximately 80% of eligible studies demonstrated strong methodological quality, although most employed a case series or case-control study design. Pharyngeal sensory-evoked potentials (PSEPs) were used to assess pharyngeal afferent cortical processing. The temporal sequence of the PSEP waveforms varied based on the sensory stimuli. PSEPs were delayed with localized scalp maps in patients with dysphagia as compared to healthy controls. The pre-motor ERPs assessed the cortical substrates involved in motor planning for swallowing, with the following major neural substrates identified: pre-motor cortex, supplementary motor area, and primary sensorimotor cortex. The pre-motor ERPs differed in amplitude for the swallow task (saliva versus liquid swallow), and the neural networks differed for cued versus non-cued task of swallowing suggesting differences in cognitive processes. This systematic review describes the application of electrophysiological measures to assess swallowing function and the promising application for furthering understanding of the neural substrates of swallowing. Standardization of protocols for use of electrophysiological measures to examine swallowing would allow for aggregation of study data to inform clinical practice for dysphagia rehabilitation.
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Affiliation(s)
- Ankita M Bhutada
- Department of Speech Pathology and Audiology, University of South Alabama, 5721 USA Drive North, Mobile, AL, 36688, USA
| | - Tara M Davis
- Department of Speech Pathology and Audiology, University of South Alabama, 5721 USA Drive North, Mobile, AL, 36688, USA
| | - Kendrea L Garand
- Department of Speech Pathology and Audiology, University of South Alabama, 5721 USA Drive North, Mobile, AL, 36688, USA.
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Cheng I, Takahashi K, Miller A, Hamdy S. Cerebral control of swallowing: An update on neurobehavioral evidence. J Neurol Sci 2022; 442:120434. [PMID: 36170765 DOI: 10.1016/j.jns.2022.120434] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 09/07/2022] [Accepted: 09/18/2022] [Indexed: 01/07/2023]
Abstract
This review aims to update the current knowledge on the cerebral control of swallowing. We review data from both animal and human studies spanning across the fields of neuroanatomy, neurophysiology and neuroimaging to evaluate advancements in our understanding in the brain's role in swallowing. Studies have collectively shown that swallowing is mediated by multiple distinct cortical and subcortical regions and that lesions to these regions can result in dysphagia. These regions are functionally connected in separate groups within and between the two hemispheres. While hemispheric dominance for swallowing has been reported in most human studies, the laterality is inconsistent across individuals. Moreover, there is a shift in activation location and laterality between swallowing preparation and execution, although such activation changes are less well-defined than that for limb motor control. Finally, we discussed recent neurostimulation treatments that may be beneficial for dysphagia after brain injury through promoting the reorganization of the swallowing neural network.
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Affiliation(s)
- Ivy Cheng
- Centre for Gastrointestinal Sciences, Division of Diabetes, Gastroenterology and Endocrinology, School of Medical Sciences, University of Manchester, UK.
| | - Kazutaka Takahashi
- Department of Organismal Biology and Anatomy, University of Chicago, USA
| | - Arthur Miller
- Division of Orthodontics, Department of Orofacial, Sciences, School of Dentistry, University of California at San Francisco, USA
| | - Shaheen Hamdy
- Centre for Gastrointestinal Sciences, Division of Diabetes, Gastroenterology and Endocrinology, School of Medical Sciences, University of Manchester, UK
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Gallois Y, Neveu F, Gabas M, Cormary X, Gaillard P, Verin E, Speyer R, Woisard V. Can Swallowing Cerebral Neurophysiology Be Evaluated during Ecological Food Intake Conditions? A Systematic Literature Review. J Clin Med 2022; 11:jcm11185480. [PMID: 36143127 PMCID: PMC9505443 DOI: 10.3390/jcm11185480] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/14/2022] [Accepted: 09/16/2022] [Indexed: 11/18/2022] Open
Abstract
Swallowing is a complex function that relies on both brainstem and cerebral control. Cerebral neurofunctional evaluations are mostly based on functional magnetic resonance imaging (fMRI) and positron emission tomography (PET), performed with the individual laying down; which is a non-ecological/non-natural position for swallowing. According to the PRISMA guidelines, a review of the non-invasive non-radiating neurofunctional tools, other than fMRI and PET, was conducted to explore the cerebral activity in swallowing during natural food intake, in accordance with the PRISMA guidelines. Using Embase and PubMed, we included human studies focusing on neurofunctional imaging during an ecologic swallowing task. From 5948 unique records, we retained 43 original articles, reporting on three different techniques: electroencephalography (EEG), magnetoencephalography (MEG) and functional near infra-red spectroscopy (fNIRS). During swallowing, all three techniques showed activity of the pericentral cortex. Variations were associated with the modality of the swallowing process (volitional or non-volitional) and the substance used (mostly water and saliva). All techniques have been used in both healthy and pathological conditions to explore the precise time course, localization or network structure of the swallowing cerebral activity, sometimes even more precisely than fMRI. EEG and MEG are the most advanced and mastered techniques but fNIRS is the most ready-to-use and the most therapeutically promising. Ongoing development of these techniques will support and improve our future understanding of the cerebral control of swallowing.
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Affiliation(s)
- Yohan Gallois
- Laboratory LNPL—UR4156, University of Toulouse-Jean Jaurès, 31058 Toulouse, France
- ENT, Otoneurology and Pediatric ENT Department, Pierre Paul Riquet Hospital, University Hospital of Toulouse, 31059 Toulouse, France
- Correspondence: ; Tel.: +33-561772039
| | - Fabrice Neveu
- Independent Researcher, Swallis Medical, 31770 Colomiers, France
| | - Muriel Gabas
- Laboratory CERTOP—UMR CNRS 5044, Maison de la Recherche, University of Toulouse-Jean Jaurès, 31058 Toulouse, France
| | | | - Pascal Gaillard
- Laboratory CLLE CNRS UMR5263, University of Toulouse-Jean Jaurès, 31058 Toulouse, France
| | - Eric Verin
- Department of Physical and Rehabilitation Medicine, Rouen University Hospital, 76000 Rouen, France
| | - Renée Speyer
- Department Special Needs Education, University of Oslo, 0318 Oslo, Norway
- Curtin School of Allied Health, Faculty of Health Sciences, Curtin University, Perth, WA 6102, Australia
- Department of Otorhinolaryngology and Head and Neck Surgery, Leiden University Medical Centre, 2333 ZA Leiden, The Netherlands
| | - Virginie Woisard
- Laboratory LNPL—UR4156, University of Toulouse-Jean Jaurès, 31058 Toulouse, France
- Voice and Deglutition Unit, Department of Otorhinolaryngology and Head and Neck Surgery, Larrey Hospital, University Hospital of Toulouse, 31059 Toulouse, France
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Michou E, Hamdy S. Reversal of the effects of focal suppression on pharyngeal corticobulbar tracts by chemesthesis coupled with repeated swallowing. Neurogastroenterol Motil 2022; 34:e14286. [PMID: 34729879 DOI: 10.1111/nmo.14286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/27/2021] [Accepted: 10/12/2021] [Indexed: 02/08/2023]
Abstract
BACKGROUND Previous reports suggested the potential benefit of chemesthesis in the form of carbonated water (CW) integrated within dysphagia rehabilitation protocols. Here, we examined the effects of CW within a repeated swallowing protocol following focal suppression to pharyngeal cortical representation as a prelude to its application in dysphagic patients. METHODS Fourteen healthy volunteers participated in a 3-arm study. Each participant underwent baseline corticobulbar pharyngeal and thenar motor-evoked potential (MEP) measurements with Transcranial Magnetic Stimulation (TMS). Subjects were then conditioned with 1Hz repetitive (r)TMS to induce focal unilateral suppression of the corticopharyngeal hotspot before randomization to each of three arms with 40 swallows of CW, non-CW and saliva swallowing on separate days. Corticobulbar and thenar MEPs were collected for up to 1 h and analyzed using repeated measures (rm)ANOVA. RESULTS A 2-way rmANOVA for Intervention x Time showed a significant effect of Intervention (F(1,13) = 7.519, p = 0.017) in both ipsi- and contra-lesional corticopharyngeal projections. Carbonation showed superiority in facilitating change by increasing pharyngeal cortical MEPs compared to non-CW (z = -3.05, p = 0.002) and saliva swallowing (z = -2.6, p = 0.008). No change in thenar representation (control) was observed nor in MEP latencies from both pharyngeal and thenar musculature. CONCLUSIONS We conclude that interventional paradigms with CW have the capacity to reverse the effects of a focal suppression with 1Hz rTMS more strongly than non-CW or saliva swallowing alone, producing site specific bi-hemispheric changes in corticopharyngeal excitability. Our data suggest that carbonation produces the effects through a mainly cortical mechanism.
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Affiliation(s)
- Emilia Michou
- Division of Diabetes, Endocrinology and Gastroenterology, School of Medical Sciences, Faculty of Biology, Medicine and Health, Clinical Sciences Building, Salford Royal Hospital, University of Manchester, Salford, UK.,Department of Speech and Language Therapy, School of Health Rehabilitation Sciences, University of Patras, Patras, Greece
| | - Shaheen Hamdy
- Division of Diabetes, Endocrinology and Gastroenterology, School of Medical Sciences, Faculty of Biology, Medicine and Health, Clinical Sciences Building, Salford Royal Hospital, University of Manchester, Salford, UK
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Hashimoto H, Takahashi K, Kameda S, Yoshida F, Maezawa H, Oshino S, Tani N, Khoo HM, Yanagisawa T, Yoshimine T, Kishima H, Hirata M. Motor and sensory cortical processing of neural oscillatory activities revealed by human swallowing using intracranial electrodes. iScience 2021; 24:102786. [PMID: 34308292 PMCID: PMC8283146 DOI: 10.1016/j.isci.2021.102786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/28/2021] [Accepted: 06/23/2021] [Indexed: 11/28/2022] Open
Abstract
Swallowing is attributed to the orchestration of motor output and sensory input. We hypothesized that swallowing can illustrate differences between motor and sensory neural processing. Eight epileptic participants fitted with intracranial electrodes over the orofacial cortex were asked to swallow a water bolus. Mouth opening and swallowing were treated as motor tasks, whereas water injection was treated as a sensory task. Phase-amplitude coupling between lower-frequency and high γ (HG) bands (75–150 Hz) was investigated. An α (10–16 Hz)-HG coupling appeared before motor-related HG power increases (burst), and a θ (5–9 Hz)-HG coupling appeared during sensory-related HG bursts. The peaks of motor-related coupling were 0.6–0.7 s earlier than that of HG power. The motor-related HG was modulated at the trough of the α oscillation, and the sensory-related HG amplitude was modulated at the peak of the θ oscillation. These contrasting results can help to elucidate the brain's sensory motor functions. Swallowing has two aspects; sensory input and motor output Phase-amplitude coupling showed differences of motor and sensory neural processing Coupling between the α and high γ band occurred before motor-related high γ activities Coupling between the θ and high γ band occurred during sensory-related high γ activities
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Affiliation(s)
- Hiroaki Hashimoto
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan.,Department of Neurosurgery, Otemae Hospital, Chuo-ku Otemae 1-5-34, Osaka, Osaka 540-0008, Japan.,Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Kazutaka Takahashi
- Department of Organismal Biology and Anatomy, The University of Chicago, 1027 E 57 St, Chicago, IL 60637, USA
| | - Seiji Kameda
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Fumiaki Yoshida
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan.,Department of Anatomy and Physiology, Saga Medical School Faculty of Medicine, Saga University, Nabeshima 5-1-1, Saga, Saga 849-8501, Japan
| | - Hitoshi Maezawa
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Satoru Oshino
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Naoki Tani
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Hui Ming Khoo
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Takufumi Yanagisawa
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Toshiki Yoshimine
- Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Haruhiko Kishima
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Masayuki Hirata
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan.,Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan.,Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
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9
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Hashimoto H, Takahashi K, Kameda S, Yoshida F, Maezawa H, Oshino S, Tani N, Khoo HM, Yanagisawa T, Yoshimine T, Kishima H, Hirata M. Swallowing-related neural oscillation: an intracranial EEG study. Ann Clin Transl Neurol 2021; 8:1224-1238. [PMID: 33949157 PMCID: PMC8164860 DOI: 10.1002/acn3.51344] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/26/2021] [Accepted: 03/02/2021] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE Swallowing is a unique movement due to the indispensable orchestration of voluntary and involuntary movements. The transition from voluntary to involuntary swallowing is executed within milliseconds. We hypothesized that the underlying neural mechanism of swallowing would be revealed by high-frequency cortical activities. METHODS Eight epileptic participants fitted with intracranial electrodes over the orofacial cortex were asked to swallow a water bolus and cortical oscillatory changes, including the high γ band (75-150 Hz) and β band (13-30 Hz), were investigated at the time of mouth opening, water injection, and swallowing. RESULTS Increases in high γ power associated with mouth opening were observed in the ventrolateral prefrontal cortex (VLPFC) with water injection in the lateral central sulcus and with swallowing in the region along the Sylvian fissure. Mouth opening induced a decrease in β power, which continued until the completion of swallowing. The high γ burst of activity was focal and specific to swallowing; however, the β activities were extensive and not specific to swallowing. In the interim between voluntary and involuntary swallowing, swallowing-related high γ power achieved its peak, and subsequently, the power decreased. INTERPRETATION We demonstrated three distinct activities related to mouth opening, water injection, and swallowing induced at different timings using high γ activities. The peak of high γ power related to swallowing suggests that during voluntary swallowing phases, the cortex is the main driving force for swallowing as opposed to the brain stem.
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Affiliation(s)
- Hiroaki Hashimoto
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan.,Department of Neurosurgery, Otemae Hospital, Chuo-ku Otemae 1-5-34, Osaka, Osaka, 540-0008, Japan.,Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Kazutaka Takahashi
- Department of Organismal Biology and Anatomy, The University of Chicago, 1027 E 57th St, Chicago, IL, 60637
| | - Seiji Kameda
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Fumiaki Yoshida
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan.,Department of Anatomy and Physiology, Saga Medical School Faculty of Medicine, Saga University, Nabeshima 5-1-1, Saga, Saga, 849-8501, Japan
| | - Hitoshi Maezawa
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Satoru Oshino
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Naoki Tani
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Hui Ming Khoo
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Takufumi Yanagisawa
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Toshiki Yoshimine
- Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Haruhiko Kishima
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Masayuki Hirata
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan.,Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan.,Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
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10
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Suntrup-Krueger S, Muhle P, Kampe I, Egidi P, Ruck T, Lenze F, Jungheim M, Gminski R, Labeit B, Claus I, Warnecke T, Gross J, Dziewas R. Effect of Capsaicinoids on Neurophysiological, Biochemical, and Mechanical Parameters of Swallowing Function. Neurotherapeutics 2021; 18:1360-1370. [PMID: 33449304 PMCID: PMC8423940 DOI: 10.1007/s13311-020-00996-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2020] [Indexed: 01/25/2023] Open
Abstract
Oropharyngeal dysphagia is prevalent in age-related neurological disorders presenting with impaired efficacy and safety of swallowing due to a loss of muscle force and sensory deficits. Stimulating the oropharynx with capsaicin that mediates Substance P release is an emerging pharmacological treatment option which needs further scientific evidence. Our aim was to comprehensively evaluate the effect of capsaicin on biochemical, neurophysiological, and biomechanical parameters of swallowing function. In a randomized study on healthy individuals, the impact of orally administered capsaicinoids at different dosages and application durations in comparison to non-carbonated water was evaluated. Time course and magnitude of salivary Substance P increase were monitored. Magnetoencephalography was used to detect cortical swallowing network alterations. Modifications in swallowing biomechanics were measured applying high-resolution pharyngeal manometry. Capsaicinoids at 10 μmol/L improved swallowing efficacy as seen by a significant increase of pharyngeal contractile integral and upper esophageal sphincter activation and relaxation times in manometry. Significant improvement of precision in a challenging swallow task accompanied by a reduction in swallowing-related submental electromyographic power was observed with capsaicinoids preconditioning at 10 μmol/L over 5 min, but not with continuous stimulation. The cortical activation pattern remained unchanged after any intervention. A significant increase of salivary Substance P was not detected with 10 μmol/L but with 50 μmol/L and lasted for 15 min after application. Capsaicinoids mediate dose-dependent Substance P release and positively alter swallowing biomechanics in healthy subjects. The results provide supportive evidence for the value of natural capsaicinoids to improve swallowing function.
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Affiliation(s)
- Sonja Suntrup-Krueger
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1 A, 48149, Muenster, Germany.
- Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Malmedyweg 15, 48149, Muenster, Germany.
| | - Paul Muhle
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1 A, 48149, Muenster, Germany
- Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Malmedyweg 15, 48149, Muenster, Germany
| | - Isabella Kampe
- Pediatrics Department, St. Franziskus-Hospital Ahlen, Robert-Koch-Straße 55, 59227, Ahlen, Germany
| | - Paula Egidi
- Department of Anesthesiology and Intensive Care Medicine, Clemenshospital Münster, Duesbergweg 124, 48153, Muenster, Germany
| | - Tobias Ruck
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1 A, 48149, Muenster, Germany
| | - Frank Lenze
- Department of Medicine B for Gastroenterology and Hepatology, University Hospital Muenster, Albert-Schweitzer-Campus 1 A, 48149, Muenster, Germany
| | - Michael Jungheim
- Department of Phoniatrics and Pediatric Audiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Richard Gminski
- Institute for Infection Prevention and Hospital Epidemiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, 79106, Freiburg, Germany
| | - Bendix Labeit
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1 A, 48149, Muenster, Germany
- Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Malmedyweg 15, 48149, Muenster, Germany
| | - Inga Claus
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1 A, 48149, Muenster, Germany
| | - Tobias Warnecke
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1 A, 48149, Muenster, Germany
| | - Joachim Gross
- Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Malmedyweg 15, 48149, Muenster, Germany
| | - Rainer Dziewas
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1 A, 48149, Muenster, Germany
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11
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Choi S, Pyun SB. Repetitive Transcranial Magnetic Stimulation on the Supplementary Motor Area Changes Brain Connectivity in Functional Dysphagia. Brain Connect 2021; 11:368-379. [PMID: 33781085 DOI: 10.1089/brain.2020.0818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background: Previous studies arguing that functional dysphagia could be explained by underlying neurobiological mechanisms are insufficient to explain brain regions that functionally interact in patients with functional dysphagia. Therefore, we investigated functional connectivity changes associated with functional dysphagia after applying facilitatory repetitive transcranial magnetic stimulation (rTMS) on the supplementary motor area (SMA). Materials and Methods: A patient with severe long-lasting functional dysphagia and 15 healthy controls participated in this study. A facilitatory 5 Hz rTMS protocol was applied to the patient's SMA. We performed functional magnetic resonance imaging (fMRI) using volitional swallowing tasks to investigate neural network changes before rTMS (pre-rTMS), immediately after rTMS, and 3 months later. Results: The pre-rTMS fMRI results of the patient showed extensive overactivation in the left-lateralized regions related to volitional swallowing compared with the healthy controls. Following rTMS, dysphagia symptoms partially improved. The patient showed positive connectivity with the bilateral cerebellum in the bilateral SMA seeds before rTMS treatment. Furthermore, left-lateralized overactivation was washed out immediately after completion of rTMS, and connectivity between the left SMA and left precentral gyrus recovered 3 months after rTMS treatment. Conclusion: Our findings confirm that functional dysphagia might be a neurobiological manifestation caused by maladaptive functional connectivity changes in brain structures related to swallowing. Furthermore, noninvasive brain modulation with rTMS over the SMA may facilitate functional connectivity changes between the cortical and subcortical regions. Accordingly, these changes will allow control of the movements related to swallowing and may lead to improved clinical symptoms.
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Affiliation(s)
- Sunyoung Choi
- Clinical Research Division, Korean Institute of Oriental Medicine, Daejeon, Republic of Korea
| | - Sung-Bom Pyun
- BK21 Graduate Program, Department of Biomedical Sciences and Department of Physical Medicine and Rehabilitation, Korea University College of Medicine, Seoul, Republic of Korea.,Brain Convergence Research Center, Korea University, Seoul, Republic of Korea
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12
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Ravichandran S, Bhatt RR, Pandit B, Osadchiy V, Alaverdyan A, Vora P, Stains J, Naliboff B, Mayer EA, Gupta A. Alterations in reward network functional connectivity are associated with increased food addiction in obese individuals. Sci Rep 2021; 11:3386. [PMID: 33564081 PMCID: PMC7873272 DOI: 10.1038/s41598-021-83116-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/07/2021] [Indexed: 12/19/2022] Open
Abstract
Functional neuroimaging studies in obesity have identified alterations in the connectivity within the reward network leading to decreased homeostatic control of ingestive behavior. However, the neural mechanisms underlying sex differences in the prevalence of food addiction in obesity is unknown. The aim of the study was to identify functional connectivity alterations associated with: (1) Food addiction, (2) Sex- differences in food addiction, (3) Ingestive behaviors. 150 participants (females: N = 103, males: N = 47; food addiction: N = 40, no food addiction: N = 110) with high BMI ≥ 25 kg/m2 underwent functional resting state MRIs. Participants were administered the Yale Food Addiction Scale (YFAS), to determine diagnostic criteria for food addiction (YFAS Symptom Count ≥ 3 with clinically significant impairment or distress), and completed ingestive behavior questionnaires. Connectivity differences were analyzed using a general linear model in the CONN Toolbox and images were segmented using the Schaefer 400, Harvard-Oxford Subcortical, and Ascending Arousal Network atlases. Significant connectivities and clinical variables were correlated. Statistical significance was corrected for multiple comparisons at q < .05. (1) Individuals with food addiction had greater connectivity between brainstem regions and the orbital frontal gyrus compared to individuals with no food addiction. (2) Females with food addiction had greater connectivity in the salience and emotional regulation networks and lowered connectivity between the default mode network and central executive network compared to males with food addiction. (3) Increased connectivity between regions of the reward network was positively associated with scores on the General Food Cravings Questionnaire-Trait, indicative of greater food cravings in individuals with food addiction. Individuals with food addiction showed greater connectivity between regions of the reward network suggesting dysregulation of the dopaminergic pathway. Additionally, greater connectivity in the locus coeruleus could indicate that the maladaptive food behaviors displayed by individuals with food addiction serve as a coping mechanism in response to pathological anxiety and stress. Sex differences in functional connectivity suggest that females with food addiction engage more in emotional overeating and less cognitive control and homeostatic processing compared to males. These mechanistic pathways may have clinical implications for understanding the sex-dependent variability in response to diet interventions.
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Affiliation(s)
- Soumya Ravichandran
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
| | - Ravi R Bhatt
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
- Imaging Genetics Center, Mark and Mary Stevens Neuroimaging and Informatics Institute, University of Southern California, Los Angeles, USA
| | - Bilal Pandit
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
| | - Vadim Osadchiy
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
- David Geffen School of Medicine At UCLA, Los Angeles, USA
| | - Anita Alaverdyan
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
| | - Priten Vora
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
| | - Jean Stains
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
- David Geffen School of Medicine At UCLA, Los Angeles, USA
- Vatche and Tamar Manoukian Division of Digestive Diseases, Los Angeles, USA
| | - Bruce Naliboff
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
- David Geffen School of Medicine At UCLA, Los Angeles, USA
- Vatche and Tamar Manoukian Division of Digestive Diseases, Los Angeles, USA
- UCLA Microbiome Center, Los Angeles, USA
| | - Emeran A Mayer
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA
- David Geffen School of Medicine At UCLA, Los Angeles, USA
- Vatche and Tamar Manoukian Division of Digestive Diseases, Los Angeles, USA
- UCLA Microbiome Center, Los Angeles, USA
- Ahmanson-Lovelace Brain Mapping Center, University of California Los Angeles (UCLA), Los Angeles, USA
| | - Arpana Gupta
- G. Oppenheimer Family Center for Neurobiology of Stress and Resilience, Ingestive Behavior and Obesity Program, CHS 42-210 MC737818, 10833 Le Conte Avenue, Los Angeles, USA.
- David Geffen School of Medicine At UCLA, Los Angeles, USA.
- Vatche and Tamar Manoukian Division of Digestive Diseases, Los Angeles, USA.
- UCLA Microbiome Center, Los Angeles, USA.
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13
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Bioelectrical Signals for the Diagnosis and Therapy of Functional Gastrointestinal Disorders. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10228102] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Coordinated contractions and motility patterns unique to each gastrointestinal organ facilitate the digestive process. These motor activities are coordinated by bioelectrical events, sensory and motor nerves, and hormones. The motility problems in the gastrointestinal tract known as functional gastrointestinal disorders (FGIDs) are generally caused by impaired neuromuscular activity and are highly prevalent. Their diagnosis is challenging as symptoms are often vague and difficult to localize. Therefore, the underlying pathophysiological factors remain unknown. However, there is an increasing level of research and clinical evidence suggesting a link between FGIDs and altered bioelectrical activity. In addition, electroceuticals (bioelectrical therapies to treat diseases) have recently gained significant interest. This paper gives an overview of bioelectrical signatures of gastrointestinal organs with normal and/or impaired motility patterns and bioelectrical therapies that have been developed for treating FGIDs. The existing research evidence suggests that bioelectrical activities could potentially help to identify the diverse etiologies of FGIDs and overcome the drawbacks of the current clinically adapted methods. Moreover, electroceuticals could potentially be effective in the treatment of FGIDs and replace the limited existing conventional therapies which often attempt to treat the symptoms rather than the underlying condition.
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14
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Muhle P, Labeit B, Wollbrink A, Claus I, Warnecke T, Wolters CH, Gross J, Dziewas R, Suntrup-Krueger S. Targeting the sensory feedback within the swallowing network-Reversing artificially induced pharyngolaryngeal hypesthesia by central and peripheral stimulation strategies. Hum Brain Mapp 2020; 42:427-438. [PMID: 33068056 PMCID: PMC7776007 DOI: 10.1002/hbm.25233] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 08/21/2020] [Accepted: 09/29/2020] [Indexed: 12/12/2022] Open
Abstract
Pharyngolaryngeal hypesthesia is a major reason for dysphagia in various neurological diseases. Emerging neuromodulation devices have shown potential to foster dysphagia rehabilitation, but the optimal treatment strategy is unknown. Because functional imaging studies are difficult to conduct in severely ill patients, we induced a virtual sensory lesion in healthy volunteers and evaluated the effects of central and peripheral neurostimulation techniques. In a sham-controlled intervention study with crossover design on 10 participants, we tested the potential of (peripheral) pharyngeal electrical stimulation (PES) and (central) transcranial direct current stimulation (tDCS) to revert the effects of lidocaine-induced pharyngolaryngeal hypesthesia on central sensorimotor processing. Changes were observed during pharyngeal air-pulse stimulation and voluntary swallowing applying magnetoencephalography before and after the interventions. PES induced a significant (p < .05) increase of activation during swallowing in the bihemispheric sensorimotor network in alpha and low gamma frequency ranges, peaking in the right premotor and left primary sensory area, respectively. With pneumatic stimulation, significant activation increase was found after PES in high gamma peaking in the left premotor area. Significant changes of brain activation after tDCS could neither be detected for pneumatic stimulation nor for swallowing. Due to the peripheral cause of dysphagia in this model, PES was able to revert the detrimental effects of reduced sensory input on central processing, whereas tDCS was not. Results may have implications for therapeutic decisions in the clinical context.
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Affiliation(s)
- Paul Muhle
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany.,Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Muenster, Germany
| | - Bendix Labeit
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany.,Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Muenster, Germany
| | - Andreas Wollbrink
- Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Muenster, Germany
| | - Inga Claus
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany
| | - Tobias Warnecke
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany
| | - Carsten H Wolters
- Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Muenster, Germany
| | - Joachim Gross
- Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Muenster, Germany
| | - Rainer Dziewas
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany
| | - Sonja Suntrup-Krueger
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany.,Institute for Biomagnetism and Biosignalanalysis, University Hospital Muenster, Muenster, Germany
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15
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Electroacupuncture Involved in Motor Cortex and Hypoglossal Neural Control to Improve Voluntary Swallowing of Poststroke Dysphagia Mice. Neural Plast 2020; 2020:8857543. [PMID: 33061953 PMCID: PMC7537716 DOI: 10.1155/2020/8857543] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 07/20/2020] [Accepted: 09/06/2020] [Indexed: 11/17/2022] Open
Abstract
The descending motor nerve conduction of voluntary swallowing is mainly launched by primary motor cortex (M1). M1 can activate and regulate peripheral nerves (hypoglossal) to control the swallowing. Acupuncture at “Lianquan” acupoint (CV23) has a positive effect against poststroke dysphagia (PSD). In previous work, we have demonstrated that electroacupuncture (EA) could regulate swallowing-related motor neurons and promote swallowing activity in the essential part of central pattern generator (CPG), containing nucleus ambiguus (NA), nucleus of the solitary tract (NTS), and ventrolateral medulla (VLM) under the physiological condition. In the present work, we have investigated the effects of EA on the PSD mice in vivo and sought evidence for PSD improvement by electrophysiology recording and laser speckle contrast imaging (LSCI). Four main conclusions can be drawn from our study: (i) EA may enhance the local field potential in noninfarction area of M1, activate the swallowing-related neurons (pyramidal cells), and increase the motor conduction of noninfarction area in voluntary swallowing; (ii) EA may improve the blood flow in both M1 on the healthy side and deglutition muscles and relieve PSD symptoms; (iii) EA could increase the motor conduction velocity (MCV) in hypoglossal nerve, enhance the EMG of mylohyoid muscle, alleviate the paralysis of swallowing muscles, release the substance P, and restore the ability to drink water; and (iv) EA can boost the functional compensation of M1 in the noninfarction side, strengthen the excitatory of hypoglossal nerve, and be involved in the voluntary swallowing neural control to improve PSD. This research provides a timely and necessary experimental evidence of the motor neural regulation in dysphagia after stroke by acupuncture in clinic.
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16
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Hashimoto H, Kameda S, Maezawa H, Oshino S, Tani N, Khoo HM, Yanagisawa T, Yoshimine T, Kishima H, Hirata M. A Swallowing Decoder Based on Deep Transfer Learning: AlexNet Classification of the Intracranial Electrocorticogram. Int J Neural Syst 2020; 31:2050056. [PMID: 32938263 DOI: 10.1142/s0129065720500562] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
To realize a brain-machine interface to assist swallowing, neural signal decoding is indispensable. Eight participants with temporal-lobe intracranial electrode implants for epilepsy were asked to swallow during electrocorticogram (ECoG) recording. Raw ECoG signals or certain frequency bands of the ECoG power were converted into images whose vertical axis was electrode number and whose horizontal axis was time in milliseconds, which were used as training data. These data were classified with four labels (Rest, Mouth open, Water injection, and Swallowing). Deep transfer learning was carried out using AlexNet, and power in the high-[Formula: see text] band (75-150[Formula: see text]Hz) was the training set. Accuracy reached 74.01%, sensitivity reached 82.51%, and specificity reached 95.38%. However, using the raw ECoG signals, the accuracy obtained was 76.95%, comparable to that of the high-[Formula: see text] power. We demonstrated that a version of AlexNet pre-trained with visually meaningful images can be used for transfer learning of visually meaningless images made up of ECoG signals. Moreover, we could achieve high decoding accuracy using the raw ECoG signals, allowing us to dispense with the conventional extraction of high-[Formula: see text] power. Thus, the images derived from the raw ECoG signals were equivalent to those derived from the high-[Formula: see text] band for transfer deep learning.
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Affiliation(s)
- Hiroaki Hashimoto
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan.,Department of Neurosurgery, Otemae Hospital, Chuo-Ku Otemae 1-5-34, Osaka, Osaka 540-0008, Japan.,Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Seiji Kameda
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Hitoshi Maezawa
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Satoru Oshino
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Naoki Tani
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Hui Ming Khoo
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Takufumi Yanagisawa
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Toshiki Yoshimine
- Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Haruhiko Kishima
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
| | - Masayuki Hirata
- Department of Neurological Diagnosis and Restoration, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan.,Endowed Research Department of Clinical Neuroengineering, Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan.,Department of Neurosurgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
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17
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Labeit B, Muhle P, Ogawa M, Claus I, Marian T, Suntrup-Krueger S, Warnecke T, Schroeder JB, Dziewas R. FEES-based assessment of pharyngeal hypesthesia-Proposal and validation of a new test procedure. Neurogastroenterol Motil 2019; 31:e13690. [PMID: 31381234 DOI: 10.1111/nmo.13690] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/09/2019] [Accepted: 07/18/2019] [Indexed: 02/08/2023]
Abstract
BACKGROUND Intact pharyngeal sensation is essential for a physiological swallowing process, and conversely, pharyngeal hypesthesia can cause dysphagia. This study introduces and validates a diagnostic test to quantify pharyngeal hypesthesia. METHODS A total of 20 healthy volunteers were included in a prospective study. Flexible endoscopic evaluation of swallowing (FEES) and a sensory test were performed both before and after pharyngeal local anesthesia. To test pharyngeal sensation, a small tube was positioned transnasally in the upper third of the oropharynx with contact to the lateral pharyngeal wall. Increasing volumes of blue-dyed water were injected through the tube, and the latency of swallowing response (LSR) was determined by two independent raters from the endoscopic video recording. Three trials were performed for each administered volume starting with 0.1 mL and increased by 0.1 mL up to 0.5 mL. KEY RESULTS The average LSR without anesthesia was 2.24 ± 0.80 s at 0.1 mL, 1.79 ± 0.84 s at 0.2 mL, 1.29 ± 0.62 s at 0.3 mL, 1.17 ± 0.41 s at 0.4 mL, and 1.19 ± 0.52 s at 0.5 mL. With anesthesia applied, the average LSR was 2.65 ± 0.62 s at 0.1 mL, 2.64 ± 0.49 s at 0.2 mL, 2.44 ± 0.65 s at 0.3 mL, 2.10 ± 0.80 s at 0.4 mL, and 2.18 ± 0.85 s at 0.5 mL. LSR was significantly longer following anesthesia at 0.2 mL (t = -3.82; P = .001), 0.3 mL (t = -4.65; P < .000), 0.4 mL (t = -5.77; P < .000), and 0.5 mL (t = -3.49; P = .005). CONCLUSION AND INFERENCES Pharyngeal hypesthesia can be quantified with sensory testing using LSR. Suitable volumes to distinguish between normal and impaired pharyngeal sensation are 0.2 mL, 0.3 mL, 0.4 mL and 0.5 mL. Experimentally induced pharyngeal anesthesia represents a valid model of sensory dysphagia.
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Affiliation(s)
- Bendix Labeit
- Department of Neurology, University Hospital Muenster, Muenster, Germany
| | - Paul Muhle
- Department of Neurology, University Hospital Muenster, Muenster, Germany
| | - Mao Ogawa
- Department of Rehabilitation Medicine I, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Inga Claus
- Department of Neurology, University Hospital Muenster, Muenster, Germany
| | - Thomas Marian
- Department of Neurology, University Hospital Muenster, Muenster, Germany
| | | | - Tobias Warnecke
- Department of Neurology, University Hospital Muenster, Muenster, Germany
| | | | - Rainer Dziewas
- Department of Neurology, University Hospital Muenster, Muenster, Germany
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18
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Dysphagia is associated with presynaptic dopaminergic dysfunction and greater non-motor symptom burden in early drug-naïve Parkinson's patients. PLoS One 2019; 14:e0214352. [PMID: 31344030 PMCID: PMC6657830 DOI: 10.1371/journal.pone.0214352] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Accepted: 05/15/2019] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The underlying pathophysiology of dysphagia is multifactorial and evidence clarifying the precise mechanisms are scarce. Dysfunction in dopamine-related and non-dopamine-related pathways, changes in cortical networks related with swallowing and peripheral mechanisms have been implicated in the pathogenesis of dysphagia. We aimed at investigating whether dysphagia is associated with presynaptic dopaminergic deficits, faster motor symptom progression and cognitive decline in a population of early drug-naïve patients with Parkinson's disease. METHODS By exploring the database of Parkinson's Progression Markers Initiative we identified forty-nine early drug-naïve Parkinson's disease patients with dysphagia. Dysphagia was identified with SCOPA-AUT question 1 (answer regularly) and was assessed with MDS-UPDRS Part-II, Item 2.3 (Chewing and Swallowing). We compared Parkinson's disease patients with dysphagia to Parkinson's disease patients without dysphagia, and investigated differences in striatal [123I]FP-CIT single photon emission computed tomography levels. Using Cox proportional hazards analyses, we also evaluated whether dysphagia can predict motor deterioration and cognitive dysfunction. RESULTS Parkinson's disease patients with dysphagia, harbored a greater deterioration regarding motor and non-motor symptoms and decreased [123I]FP-CIT binding when compared with patients without dysphagia. Higher burden of dysphagia (MDS-UPDRS-II, item 2.3) was correlated with lower [123I]FP-CIT uptakes within the striatum (rs = -0.157; P = 0.002) and the caudate (rs = -0.156; P = 0.002). The presence of dysphagia was not a predictor of motor progression (Hazard ratio [HR]: 1.143, 95% confidence interval [CI]: 0.848-1.541; P = 0.379) or cognitive decline (HR: 1.294, 95% CI: 0.616-2.719; P = 0.496). CONCLUSIONS Dysphagia is associated with decreased presynaptic dopaminergic integrity within caudate and greater motor and non-motor symptoms burden in early drug-naïve PD.
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19
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Neurophysiological Adaptation and Neuromodulatory Treatment Approaches in Patients Suffering from Post-stroke Dysphagia. CURRENT PHYSICAL MEDICINE AND REHABILITATION REPORTS 2018. [DOI: 10.1007/s40141-018-0201-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Suntrup-Krueger S, Ringmaier C, Muhle P, Wollbrink A, Kemmling A, Hanning U, Claus I, Warnecke T, Teismann I, Pantev C, Dziewas R. Randomized trial of transcranial direct current stimulation for poststroke dysphagia. Ann Neurol 2018; 83:328-340. [PMID: 29350775 DOI: 10.1002/ana.25151] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 01/16/2018] [Accepted: 01/17/2018] [Indexed: 11/12/2022]
Abstract
OBJECTIVE We evaluated whether transcranial direct current stimulation (tDCS) is able to enhance dysphagia rehabilitation following stroke. Besides relating clinical effects with neuroplastic changes in cortical swallowing processing, we aimed to identify factors influencing treatment success. METHODS In this double-blind, randomized study, 60 acute dysphagic stroke patients received contralesional anodal (1mA, 20 minutes) or sham tDCS on 4 consecutive days. Swallowing function was thoroughly assessed before and after the intervention using the validated Fiberoptic Endoscopic Dysphagia Severity Scale (FEDSS) and clinical assessment. In 10 patients, swallowing-related brain activation was recorded applying magnetoencephalography before and after the intervention. Voxel-based statistical lesion pattern analysis was also performed. RESULTS Study groups did not differ according to demographic data, stroke characteristics, or baseline dysphagia severity. Patients treated with tDCS showed greater improvement in FEDSS than the sham group (1.3 vs 0.4 points, mean difference = 0.9, 95% confidence interval [CI] = 0.4-1.4, p < 0.0005). Functional recovery was accompanied by a significant increase of activation (p < 0.05) in the contralesional swallowing network after real but not sham tDCS. Regarding predictors of treatment success, for every hour earlier that treatment was initiated, there was greater improvement on the FEDSS (adjusted odds ratio = 0.99, 95% CI = 0.98-1.00, p < 0.05) in multivariate analysis. Stroke location in the right insula and operculum was indicative of worse response to tDCS (p < 0.05). INTERPRETATION Application of tDCS over the contralesional swallowing motor cortex supports swallowing network reorganization, thereby leading to faster rehabilitation of acute poststroke dysphagia. Early treatment initiation seems beneficial. tDCS may be less effective in right-hemispheric insulo-opercular stroke. Ann Neurol 2018;83:328-340.
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Affiliation(s)
- Sonja Suntrup-Krueger
- Department of Neurology, University Hospital Münster, Albert Schweitzer Campus 1 Münster.,Institute for Biomagnetism and Biosignal Analysis, University Hospital Münster, Münster
| | | | - Paul Muhle
- Department of Neurology, University Hospital Münster, Albert Schweitzer Campus 1 Münster.,Institute for Biomagnetism and Biosignal Analysis, University Hospital Münster, Münster
| | - Andreas Wollbrink
- Institute for Biomagnetism and Biosignal Analysis, University Hospital Münster, Münster
| | - Andre Kemmling
- Institute of Neuroradiology, University Hospital Lübeck, Lübeck
| | - Uta Hanning
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg
| | - Inga Claus
- Department of Neurology, University Hospital Münster, Albert Schweitzer Campus 1 Münster
| | - Tobias Warnecke
- Department of Neurology, University Hospital Münster, Albert Schweitzer Campus 1 Münster
| | - Inga Teismann
- Department of Neurology, University Hospital Münster, Albert Schweitzer Campus 1 Münster
| | - Christo Pantev
- Institute for Biomagnetism and Biosignal Analysis, University Hospital Münster, Münster
| | - Rainer Dziewas
- Department of Neurology, University Hospital Münster, Albert Schweitzer Campus 1 Münster
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21
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Maezawa H. Cortical Mechanisms of Tongue Sensorimotor Functions in Humans: A Review of the Magnetoencephalography Approach. Front Hum Neurosci 2017; 11:134. [PMID: 28400725 PMCID: PMC5368248 DOI: 10.3389/fnhum.2017.00134] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 03/08/2017] [Indexed: 11/13/2022] Open
Abstract
The tongue plays important roles in a variety of critical human oral functions, including speech production, swallowing, mastication and respiration. These sophisticated tongue movements are in part finely regulated by cortical entrainment. Many studies have examined sensorimotor processing in the limbs using magnetoencephalography (MEG), which has high spatiotemporal resolution. Such studies have employed multiple methods of analysis, including somatosensory evoked fields (SEFs), movement-related cortical fields (MRCFs), event-related desynchronization/synchronization (ERD/ERS) associated with somatosensory stimulation or movement and cortico-muscular coherence (CMC) during sustained movement. However, the cortical mechanisms underlying the sensorimotor functions of the tongue remain unclear, as contamination artifacts induced by stimulation and/or muscle activity within the orofacial region complicates MEG analysis in the oral region. Recently, several studies have obtained MEG recordings from the tongue region using improved stimulation methods and movement tasks. In the present review, we provide a detailed overview of tongue sensorimotor processing in humans, based on the findings of recent MEG studies. In addition, we review the clinical applications of MEG for sensory disturbances of the tongue caused by damage to the lingual nerve. Increased knowledge of the physiological and pathophysiological mechanisms underlying tongue sensorimotor processing may improve our understanding of the cortical entrainment of human oral functions.
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Affiliation(s)
- Hitoshi Maezawa
- Department of Oral Physiology, Graduate School of Dental Medicine, Hokkaido University Sapporo, Japan
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22
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Swallowing Preparation and Execution: Insights from a Delayed-Response Functional Magnetic Resonance Imaging (fMRI) Study. Dysphagia 2017; 32:526-541. [PMID: 28361202 DOI: 10.1007/s00455-017-9794-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 03/21/2017] [Indexed: 10/19/2022]
Abstract
The present study sought to elucidate the functional contributions of sub-regions of the swallowing neural network in swallowing preparation and swallowing motor execution. Seven healthy volunteers participated in a delayed-response, go, no-go functional magnetic resonance imaging study involving four semi-randomly ordered activation tasks: (i) "prepare to swallow," (ii) "voluntary saliva swallow," (iii) "do not prepare to swallow," and (iv) "do not swallow." Results indicated that brain activation was significantly greater during swallowing preparation, than during swallowing execution, within the rostral and intermediate anterior cingulate cortex bilaterally, premotor cortex (left > right hemisphere), pericentral cortex (left > right hemisphere), and within several subcortical nuclei including the bilateral thalamus, caudate, and putamen. In contrast, activation within the bilateral insula and the left dorsolateral pericentral cortex was significantly greater in relation to swallowing execution, compared with swallowing preparation. Still other regions, including a more inferior ventrolateral pericentral area, and adjoining Brodmann area 43 bilaterally, and the supplementary motor area, were activated in relation to both swallowing preparation and execution. These findings support the view that the preparation, and subsequent execution, of swallowing are mediated by a cascading pattern of activity within the sub-regions of the bilateral swallowing neural network.
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23
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Shaban H, O’Connor R, Ovsepian SV, Dinan TG, Cryan JF, Schellekens H. Electrophysiological approaches to unravel the neurobiological basis of appetite and satiety: use of the multielectrode array as a screening strategy. Drug Discov Today 2017; 22:31-42. [DOI: 10.1016/j.drudis.2016.09.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/03/2016] [Accepted: 09/06/2016] [Indexed: 01/10/2023]
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24
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Time–frequency analysis of the EEG mu rhythm as a measure of sensorimotor integration in the later stages of swallowing. Clin Neurophysiol 2016; 127:2625-35. [DOI: 10.1016/j.clinph.2016.04.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 04/22/2016] [Accepted: 04/25/2016] [Indexed: 11/19/2022]
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25
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Dehaghani SE, Yadegari F, Asgari A, Chitsaz A, Karami M. Brain regions involved in swallowing: Evidence from stroke patients in a cross-sectional study. JOURNAL OF RESEARCH IN MEDICAL SCIENCES 2016; 21:45. [PMID: 27904591 PMCID: PMC5122214 DOI: 10.4103/1735-1995.183997] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 11/23/2015] [Accepted: 04/11/2016] [Indexed: 11/30/2022]
Abstract
Background: Limited data available about the mechanisms of dysphagia and areas involving swallow after brain damage; accordingly it is hard to predict which cases are more likely to develop swallowing dysfunction based on the neuroimaging. The aim of this study was to investigate the relationship between brain lesions and dysphagia in a sample of acute conscious stroke patients. Materials and Methods: In a cross-sectional study, 113 acute conscious stroke patients (69 male mean [standard deviation (SD)] age 64.37 [15.1]), participated in this study. Two neurologists and one radiologist localized brain lesions according to neuroimaging of the patients. Swallowing functions were assessed clinically by an expert speech pathologist with the Mann Assessment of Swallowing Ability (MASA). The association of brain region and swallowing problem was statistically evaluated using Chi-square test. Results: Mean (SD) MASA score for the dysphagic patients was 139.61 (29.77). Swallowing problem was significantly more prevalent in the right primary sensory (P = 0.03), right insula (P = 0.005), and right internal capsule (P = 0.05). Conclusion: It may be concluded from these findings that the right hemisphere lesions associated with occurring dysphagia. Further studies using more advanced diagnostic tools on big samples particularly in a perspective structure are needed.
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Affiliation(s)
- Shiva Ebrahimian Dehaghani
- Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran; Department of Speech Therapy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fariba Yadegari
- Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Ali Asgari
- Department of Psychology, Kharazmi University, Tehran, Iran
| | - Ahmad Chitsaz
- Department of Neurology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mehdi Karami
- Department of Radiology, Isfahan University of Medical Sciences, Isfahan, Iran
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26
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Neural and cortical analysis of swallowing and detection of motor imagery of swallow for dysphagia rehabilitation-A review. PROGRESS IN BRAIN RESEARCH 2016; 228:185-219. [PMID: 27590970 DOI: 10.1016/bs.pbr.2016.03.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Swallowing is an essential function in our daily life; nevertheless, stroke or other neurodegenerative diseases can cause the malfunction of swallowing function, ie, dysphagia. The objectives of this review are to understand the neural and cortical basis of swallowing and tongue, and review the latest techniques on the detection of motor imagery of swallow (MI-SW) and motor imagery of tongue movements (MI-TM), so that a practical system can be developed for the rehabilitation of poststroke dysphagia patients. Specifically, we firstly describe the swallowing process and how the swallowing function is assessed clinically. Secondly, we review the techniques that performed the neural and cortical analysis of swallowing and tongue based on different modalities such as functional magnetic resonance imaging, positron emission tomography, near-infrared spectroscopy (NIRS), and magnetoencephalography. Thirdly, we review the techniques that performed detection and analysis of MI-SW and MI-TM for dysphagia stroke rehabilitation based on electroencephalography (EEG) and NIRS. Finally, discussions on the advantages and limitations of the studies are presented; an example system and future research directions for the rehabilitation of stroke dysphagia patients are suggested.
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27
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Kober SE, Gressenberger B, Kurzmann J, Neuper C, Wood G. Voluntary Modulation of Hemodynamic Responses in Swallowing Related Motor Areas: A Near-Infrared Spectroscopy-Based Neurofeedback Study. PLoS One 2015; 10:e0143314. [PMID: 26575032 PMCID: PMC4648579 DOI: 10.1371/journal.pone.0143314] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 11/03/2015] [Indexed: 11/28/2022] Open
Abstract
In the present study, we show for the first time that motor imagery of swallowing, which is defined as the mental imagination of a specific motor act without overt movements by muscular activity, can be successfully used as mental strategy in a neurofeedback training paradigm. Furthermore, we demonstrate its effects on cortical correlates of swallowing function. Therefore, N = 20 healthy young adults were trained to voluntarily increase their hemodynamic response in swallowing related brain areas as assessed with near-infrared spectroscopy (NIRS). During seven training sessions, participants received either feedback of concentration changes in oxygenated hemoglobin (oxy-Hb group, N = 10) or deoxygenated hemoglobin (deoxy-Hb group, N = 10) over the inferior frontal gyrus (IFG) during motor imagery of swallowing. Before and after the training, we assessed cortical activation patterns during motor execution and imagery of swallowing. The deoxy-Hb group was able to voluntarily increase deoxy-Hb over the IFG during imagery of swallowing. Furthermore, swallowing related cortical activation patterns were more pronounced during motor execution and imagery after the training compared to the pre-test, indicating cortical reorganization due to neurofeedback training. The oxy-Hb group could neither control oxy-Hb during neurofeedback training nor showed any cortical changes. Hence, successful modulation of deoxy-Hb over swallowing related brain areas led to cortical reorganization and might be useful for future treatments of swallowing dysfunction.
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Affiliation(s)
- Silvia Erika Kober
- Department of Psychology, University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
- * E-mail:
| | | | | | - Christa Neuper
- Department of Psychology, University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
- Laboratory of Brain-Computer Interfaces, Institute for Knowledge Discovery, Graz University of Technology, Graz, Austria
| | - Guilherme Wood
- Department of Psychology, University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
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28
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Kober SE, Bauernfeind G, Woller C, Sampl M, Grieshofer P, Neuper C, Wood G. Hemodynamic Signal Changes Accompanying Execution and Imagery of Swallowing in Patients with Dysphagia: A Multiple Single-Case Near-Infrared Spectroscopy Study. Front Neurol 2015. [PMID: 26217298 PMCID: PMC4491622 DOI: 10.3389/fneur.2015.00151] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
In the present multiple case study, we examined hemodynamic changes in the brain in response to motor execution (ME) and motor imagery (MI) of swallowing in dysphagia patients compared to healthy matched controls using near-infrared spectroscopy (NIRS). Two stroke patients with cerebral lesions in the right hemisphere, two stroke patients with lesions in the brainstem, and two neurologically healthy control subjects actively swallowed saliva (ME) and mentally imagined to swallow saliva (MI) in a randomized order while changes in concentration of oxygenated hemoglobin (oxy-Hb) and deoxygenated hemoglobin (deoxy-Hb) were assessed. In line with recent findings in healthy young adults, MI and ME of swallowing led to the strongest NIRS signal change in the inferior frontal gyrus in stroke patients as well as in healthy elderly. We found differences in the topographical distribution and time course of the hemodynamic response in dependence on lesion location. Dysphagia patients with lesions in the brainstem showed bilateral hemodynamic signal changes in the inferior frontal gyrus during active swallowing comparable to healthy controls. In contrast, dysphagia patients with cerebral lesions in the right hemisphere showed more unilateral activation patterns during swallowing. Furthermore, patients with cerebral lesions showed a prolonged time course of the hemodynamic response during MI and ME of swallowing compared to healthy controls and patients with brainstem lesions. Brain activation patterns associated with ME and MI of swallowing were largely comparable, especially for changes in deoxy-Hb. Hence, the present results provide new evidence regarding timing and topographical distribution of the hemodynamic response during ME and MI of swallowing in dysphagia patients and may have practical impact on future dysphagia treatment.
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Affiliation(s)
- Silvia Erika Kober
- Department of Psychology, University of Graz , Graz , Austria ; BioTechMed Graz , Graz , Austria
| | - Günther Bauernfeind
- BioTechMed Graz , Graz , Austria ; Laboratory of Brain-Computer Interfaces, Institute for Knowledge Discovery, Graz University of Technology , Graz , Austria
| | - Carina Woller
- Klinik Judendorf-Straßengel , Gratwein-Straßengel , Austria
| | | | | | - Christa Neuper
- Department of Psychology, University of Graz , Graz , Austria ; BioTechMed Graz , Graz , Austria ; Laboratory of Brain-Computer Interfaces, Institute for Knowledge Discovery, Graz University of Technology , Graz , Austria
| | - Guilherme Wood
- Department of Psychology, University of Graz , Graz , Austria ; BioTechMed Graz , Graz , Austria
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29
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Sakihara K, Hirata M, Ebe K, Kimura K, Yi Ryu S, Kono Y, Muto N, Yoshioka M, Yoshimine T, Yorifuji S. Cerebral oscillatory activity during simulated driving using MEG. Front Hum Neurosci 2015; 8:975. [PMID: 25566017 PMCID: PMC4267277 DOI: 10.3389/fnhum.2014.00975] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Accepted: 11/16/2014] [Indexed: 11/28/2022] Open
Abstract
We aimed to examine cerebral oscillatory differences associated with psychological processes during simulated car driving. We recorded neuromagnetic signals in 14 healthy volunteers using magnetoencephalography (MEG) during simulated driving. MEG data were analyzed using synthetic aperture magnetometry to detect the spatial distribution of cerebral oscillations. Group effects between subjects were analyzed statistically using a non-parametric permutation test. Oscillatory differences were calculated by comparison between “passive viewing” and “active driving.” “Passive viewing” was the baseline, and oscillatory differences during “active driving” showed an increase or decrease in comparison with a baseline. Power increase in the theta band was detected in the superior frontal gyrus (SFG) during active driving. Power decreases in the alpha, beta, and low gamma bands were detected in the right inferior parietal lobe (IPL), left postcentral gyrus (PoCG), middle temporal gyrus (MTG), and posterior cingulate gyrus (PCiG) during active driving. Power increase in the theta band in the SFG may play a role in attention. Power decrease in the right IPL may reflect selectively divided attention and visuospatial processing, whereas that in the left PoCG reflects sensorimotor activation related to driving manipulation. Power decreases in the MTG and PCiG may be associated with object recognition.
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Affiliation(s)
- Kotoe Sakihara
- Department of Functional Diagnostic Science, Graduate School of Medicine, Osaka University Suita, Japan ; Department of Clinical Laboratory Science, Faculty of Medical Technology, Teikyo University Itabashi-ku, Japan
| | - Masayuki Hirata
- Department of Functional Diagnostic Science, Graduate School of Medicine, Osaka University Suita, Japan ; Department of Neurosurgery, Graduate School of Medicine, Osaka University Suita, Japan
| | - Kazutoshi Ebe
- Frontier Research Center, Toyota Central R&D Labs., Inc., Nagakute, Japan
| | - Kenji Kimura
- Human System Integration Group, Vehicle Engineering Development Division, Toyota Motor Corporation Toyota, Japan
| | - Seong Yi Ryu
- Department of Functional Diagnostic Science, Graduate School of Medicine, Osaka University Suita, Japan
| | - Yoshiyuki Kono
- Department of Functional Diagnostic Science, Graduate School of Medicine, Osaka University Suita, Japan
| | - Nozomi Muto
- Department of Functional Diagnostic Science, Graduate School of Medicine, Osaka University Suita, Japan
| | - Masako Yoshioka
- Department of Functional Diagnostic Science, Graduate School of Medicine, Osaka University Suita, Japan
| | - Toshiki Yoshimine
- Department of Neurosurgery, Graduate School of Medicine, Osaka University Suita, Japan
| | - Shiro Yorifuji
- Department of Functional Diagnostic Science, Graduate School of Medicine, Osaka University Suita, Japan
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30
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Inamoto K, Sakuma S, Ariji Y, Higuchi N, Izumi M, Nakata K. Measurement of cerebral blood volume dynamics during volitional swallowing using functional near-infrared spectroscopy: an exploratory study. Neurosci Lett 2014; 588:67-71. [PMID: 25545557 DOI: 10.1016/j.neulet.2014.12.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 12/04/2014] [Accepted: 12/16/2014] [Indexed: 10/24/2022]
Abstract
The aim of this study was to examine cerebral blood volume dynamics during volitional swallowing using multi-channel functional near-infrared spectroscopy (fNIRS) to understand the basic cortical activation patterns. Fifteen volunteers (age, 26.5±1.3 years, mean±SD) performed volitional swallowing of a 5-ml bolus of water as a task. A 52-channel fNIRS system was used for measuring oxy-Hb levels. We determined the oxy-Hb concentration changes in each channel by calculating the differences between rest and task oxy-Hb levels. Differences in rest and task data were assessed using a paired-t test (p<0.05). A significant increase in oxy-Hb was found in 21 channels. The cortical regions that exhibited increased oxy-Hb concentration included the bilateral precentral gyrus, postcentral gyrus, inferior frontal gyrus, superior temporal gyrus, middle temporal gyrus, and supramarginal gyrus. These data provide a description of cortical activation patterns during volitional swallowing using fNIRS, which will be useful for the evaluation of dysphasia and the effects of the rehabilitation [Corrected].
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Affiliation(s)
- Kyoko Inamoto
- Department of Endodontics, School of Dentistry, Aichi Gakuin University, Aichi, Japan.
| | - Shigemitsu Sakuma
- Department of Fixed Prosthodontics, School of Dentistry, Aichi Gakuin University, Aichi, Japan
| | - Yoshiko Ariji
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi Gakuin University, Aichi, Japan
| | - Naoya Higuchi
- Department of Endodontics, School of Dentistry, Aichi Gakuin University, Aichi, Japan
| | - Masahiro Izumi
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi Gakuin University, Aichi, Japan
| | - Kazuhiko Nakata
- Department of Endodontics, School of Dentistry, Aichi Gakuin University, Aichi, Japan
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31
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Suntrup S, Teismann I, Wollbrink A, Winkels M, Warnecke T, Pantev C, Dziewas R. Pharyngeal electrical stimulation can modulate swallowing in cortical processing and behavior - magnetoencephalographic evidence. Neuroimage 2014; 104:117-24. [PMID: 25451471 DOI: 10.1016/j.neuroimage.2014.10.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Revised: 09/15/2014] [Accepted: 10/06/2014] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The act of swallowing is a complex neuromuscular function that is processed in a distributed network involving cortical, subcortical and brainstem structures. Difficulty in swallowing arises from a variety of neurologic diseases for which therapeutic options are currently limited. Pharyngeal electrical stimulation (PES) is a novel intervention designed to promote plastic changes in the pharyngeal motor cortex to aid dysphagia rehabilitation. In the present study we evaluate the effect of PES on cortical swallowing network activity and associated changes in swallowing performance. METHODS In a randomized, crossover study design 10min of real (0.2-ms pulses, 5Hz, 280V, stimulation intensity at 75% of maximum tolerated threshold) or sham PES were delivered to 14 healthy volunteers in two separate sessions. Stimulation was delivered via a pair of bipolar ring electrodes mounted on an intraluminal catheter positioned in the pharynx. Before and after each intervention swallowing capacity (ml/s) was tested using a 150ml-water swallowing stress test. Event-related desynchronization (ERD) of cortical oscillatory activity during volitional swallowing was recorded applying whole-head magnetoencephalography before, immediately after and 45min past the intervention. RESULTS A prominent reduction of ERD in sensorimotor brain areas occurred in the alpha and beta frequency ranges immediately after real PES but not after sham stimulation (p<0.05) and had faded after 45min. Volume per swallow and swallowing capacity significantly increased following real stimulation only. CONCLUSION Attenuation of ERD following PES reflects stimulation-induced increased swallowing processing efficiency, which is associated with subtle changes in swallowing function in healthy subjects. Our data contribute evidence that swallowing network organization and behavior can effectively be modulated by PES.
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Affiliation(s)
- Sonja Suntrup
- Department of Neurology, University of Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149 Münster, Germany; Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Malmedyweg 15, 48149 Muenster, Germany.
| | - Inga Teismann
- Department of Neurology, University of Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149 Münster, Germany
| | - Andreas Wollbrink
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Malmedyweg 15, 48149 Muenster, Germany
| | - Martin Winkels
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Malmedyweg 15, 48149 Muenster, Germany
| | - Tobias Warnecke
- Department of Neurology, University of Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149 Münster, Germany
| | - Christo Pantev
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Malmedyweg 15, 48149 Muenster, Germany
| | - Rainer Dziewas
- Department of Neurology, University of Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149 Münster, Germany
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32
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Stice E, Yokum S. Brain reward region responsivity of adolescents with and without parental substance use disorders. PSYCHOLOGY OF ADDICTIVE BEHAVIORS 2014; 28:805-15. [PMID: 24128289 PMCID: PMC3986351 DOI: 10.1037/a0034460] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The present study tested the competing hypotheses that adolescents at risk for future substance abuse and dependence by virtue of parental substance use disorders show either weaker or stronger responsivity of brain regions implicated in reward relative to youth without parental history of substance use disorders. Adolescents (n = 52) matched on demographics with and without parental substance use disorders, as determined by diagnostic interviews, who denied substance use in the past year were compared on functional MRI (fMRI) paradigms assessing neural response to receipt and anticipated receipt of monetary and food reward. Parental-history-positive versus -negative adolescents showed greater activation in the left dorsolateral prefrontal cortex and bilateral putamen, and less activation in the fusiform gyrus and inferior temporal gyrus in response to anticipating winning money, as well as greater activation in the left midbrain and right paracentral lobule, and less activation in the right middle frontal gyrus in response to milkshake receipt. Results indicate that adolescents at risk for future onset of substance use disorders show elevated responsivity of brain regions implicated in reward, extending results from 2 smaller prior studies that found that individuals with versus without parental alcohol use disorders showed greater reward region response to anticipated monetary reward and pictures of alcohol. Collectively, results provide support for the reward surfeit model of substance use disorders, rather than the reward deficit model.
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Abstract
With more than 100 studies published over the past two decades, functional brain imaging research in gastroenterology has become an established field; one that has enabled improved insight into the supraspinal responses evoked by gastrointestinal stimulation both in health and disease. However, there remains considerable inter-study variation in the published results, largely owing to methodological differences in stimulation and recording techniques, heterogeneous patient selection, lack of control for psychological factors and so on. These issues with reproducibility, although not unique to studies of the gastrointestinal tract, can lead to unjustified inferences. To obtain consistent and more clinically relevant results, there is a need to optimize and standardize brain imaging studies across different centres. In addition, the use of complementary and more novel brain imaging modalities and analyses, which are now being used in other fields of research, might help unravel the factors at play in functional gastrointestinal disorders. This Review highlights the areas in which functional brain imaging has been useful and what it has revealed, the areas that are in need of improvement, and finally suggestions for future directions.
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Mihai PG, Otto M, Platz T, Eickhoff SB, Lotze M. Sequential evolution of cortical activity and effective connectivity of swallowing using fMRI. Hum Brain Mapp 2014; 35:5962-73. [PMID: 25044473 DOI: 10.1002/hbm.22597] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 07/02/2014] [Accepted: 07/14/2014] [Indexed: 11/09/2022] Open
Abstract
Swallowing consists of a hierarchical sequence of primary motor and somatosensory processes. The temporal interplay of different phases is complex and clinical disturbances frequent. Of interest was the temporal interaction of the swallowing network. Time resolution optimized functional magnetic resonance imaging was used to describe the temporal sequence of representation sites of swallowing and their functional connectivity. Sixteen young healthy volunteers were investigated who swallowed 2 ml of water 20 times per run with a repetition time for functional imaging of 514 ms. After applying the general linear model approach to identify activation magnitude in preselected regions of interest repeated measures analysis of variance (rmANOVA) was used to detect relevant effects on lateralization, time, and onset. Furthermore, dynamic causal modeling (DCM) was applied to uncover where the input enters the model and the way in which the cortical regions are connected. The temporal analysis revealed a successive activation starting at the premotor cortex, supplementary motor area (SMA), and bilateral thalamus, followed by the primary sensorimotor cortex, the posterior insula, and cerebellum and culminating with activation in the pons shortly before subsiding. The rmANOVA revealed that activation was lateralized initially to the left hemisphere and gradually moved to the right hemisphere over time. The group random effects DCM analysis resulted in a most likely model that consisted of inputs to SMA and M1S1, bidirectionally connected, and a one-way connection from M1S1 to the posterior insula.
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Affiliation(s)
- Paul Glad Mihai
- Functional Imaging Unit, Department of Diagnostic Radiology and Neuroradiology, Ernst-Moritz-Arndt-Universität, Greifswald, Germany
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Yang H, Guan C, Chua KSG, Chok SS, Wang CC, Soon PK, Tang CKY, Ang KK. Detection of motor imagery of swallow EEG signals based on the dual-tree complex wavelet transform and adaptive model selection. J Neural Eng 2014; 11:035016. [PMID: 24836742 DOI: 10.1088/1741-2560/11/3/035016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Detection of motor imagery of hand/arm has been extensively studied for stroke rehabilitation. This paper firstly investigates the detection of motor imagery of swallow (MI-SW) and motor imagery of tongue protrusion (MI-Ton) in an attempt to find a novel solution for post-stroke dysphagia rehabilitation. Detection of MI-SW from a simple yet relevant modality such as MI-Ton is then investigated, motivated by the similarity in activation patterns between tongue movements and swallowing and there being fewer movement artifacts in performing tongue movements compared to swallowing. APPROACH Novel features were extracted based on the coefficients of the dual-tree complex wavelet transform to build multiple training models for detecting MI-SW. The session-to-session classification accuracy was boosted by adaptively selecting the training model to maximize the ratio of between-classes distances versus within-class distances, using features of training and evaluation data. MAIN RESULTS Our proposed method yielded averaged cross-validation (CV) classification accuracies of 70.89% and 73.79% for MI-SW and MI-Ton for ten healthy subjects, which are significantly better than the results from existing methods. In addition, averaged CV accuracies of 66.40% and 70.24% for MI-SW and MI-Ton were obtained for one stroke patient, demonstrating the detectability of MI-SW and MI-Ton from the idle state. Furthermore, averaged session-to-session classification accuracies of 72.08% and 70% were achieved for ten healthy subjects and one stroke patient using the MI-Ton model. SIGNIFICANCE These results and the subjectwise strong correlations in classification accuracies between MI-SW and MI-Ton demonstrated the feasibility of detecting MI-SW from MI-Ton models.
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Affiliation(s)
- Huijuan Yang
- Institute for Infocomm Research, Agency for Science, Technology and Research (A*STAR), Singapore
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Kober SE, Wood G. Changes in hemodynamic signals accompanying motor imagery and motor execution of swallowing: a near-infrared spectroscopy study. Neuroimage 2014; 93 Pt 1:1-10. [PMID: 24576696 DOI: 10.1016/j.neuroimage.2014.02.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 01/21/2014] [Accepted: 02/16/2014] [Indexed: 01/25/2023] Open
Abstract
In the present study we investigated hemodynamic changes in the brain in response to motor execution (ME) and motor imagery (MI) of swallowing using near-infrared spectroscopy (NIRS). Previous studies provide evidence that ME and MI of limb movements lead to comparable brain activation patterns indicating the potential value of MI for motor rehabilitation. In this context, identifying brain correlates of MI of swallowing may be potentially useful for the treatment of dysphagia. Fourteen healthy participants actively swallowed water (ME) and mentally imagined to swallow water (MI) in a randomized order while changes in concentration of oxygenated hemoglobin (oxy-Hb) and deoxygenated hemoglobin (deoxy-Hb) were assessed. MI and ME led to the strongest NIRS signal changes in the inferior frontal gyrus. During and after ME, oxy-Hb significantly increased, with a maximum peak around 15s after task onset. In contrast, oxy-Hb decreased during MI compared to a rest period probably because of motor inhibition mechanisms. Changes in deoxy-Hb were largely comparable between MI and ME, especially when participants used a kinesthetic motor imagery strategy during MI compared to no specific strategy. Hence, the present study provides new evidence concerning timing and topographical distribution of the hemodynamic response during ME and MI of swallowing.
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Affiliation(s)
- S E Kober
- Department of Psychology, University of Graz, Graz, Austria.
| | - G Wood
- Department of Psychology, University of Graz, Graz, Austria.
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Suntrup S, Teismann I, Wollbrink A, Warnecke T, Winkels M, Pantev C, Dziewas R. Altered cortical swallowing processing in patients with functional dysphagia: a preliminary study. PLoS One 2014; 9:e89665. [PMID: 24586948 PMCID: PMC3929717 DOI: 10.1371/journal.pone.0089665] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 01/24/2014] [Indexed: 12/12/2022] Open
Abstract
Objective Current neuroimaging research on functional disturbances provides growing evidence for objective neuronal correlates of allegedly psychogenic symptoms, thereby shifting the disease concept from a psychological towards a neurobiological model. Functional dysphagia is such a rare condition, whose pathogenetic mechanism is largely unknown. In the absence of any organic reason for a patient's persistent swallowing complaints, sensorimotor processing abnormalities involving central neural pathways constitute a potential etiology. Methods In this pilot study we measured cortical swallow-related activation in 5 patients diagnosed with functional dysphagia and a matched group of healthy subjects applying magnetoencephalography. Source localization of cortical activation was done with synthetic aperture magnetometry. To test for significant differences in cortical swallowing processing between groups, a non-parametric permutation test was afterwards performed on individual source localization maps. Results Swallowing task performance was comparable between groups. In relation to control subjects, in whom activation was symmetrically distributed in rostro-medial parts of the sensorimotor cortices of both hemispheres, patients showed prominent activation of the right insula, dorsolateral prefrontal cortex and lateral premotor, motor as well as inferolateral parietal cortex. Furthermore, activation was markedly reduced in the left medial primary sensory cortex as well as right medial sensorimotor cortex and adjacent supplementary motor area (p<0.01). Conclusions Functional dysphagia - a condition with assumed normal brain function - seems to be associated with distinctive changes of the swallow-related cortical activation pattern. Alterations may reflect exaggerated activation of a widely distributed vigilance, self-monitoring and salience rating network that interferes with down-stream deglutition sensorimotor control.
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Affiliation(s)
- Sonja Suntrup
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Muenster, Germany
- Department of Neurology, University of Muenster, Muenster, Germany
- * E-mail:
| | - Inga Teismann
- Department of Neurology, University of Muenster, Muenster, Germany
| | - Andreas Wollbrink
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Muenster, Germany
| | - Tobias Warnecke
- Department of Neurology, University of Muenster, Muenster, Germany
| | - Martin Winkels
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Muenster, Germany
| | - Christo Pantev
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Muenster, Germany
| | - Rainer Dziewas
- Department of Neurology, University of Muenster, Muenster, Germany
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Miyaji H, Hironaga N, Umezaki T, Hagiwara K, Shigeto H, Sawatsubashi M, Tobimatsu S, Komune S. Neuromagnetic detection of the laryngeal area: Sensory-evoked fields to air-puff stimulation. Neuroimage 2013; 88:162-9. [PMID: 24246493 DOI: 10.1016/j.neuroimage.2013.11.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 10/16/2013] [Accepted: 11/04/2013] [Indexed: 10/26/2022] Open
Abstract
The sensory projections from the oral cavity, pharynx, and larynx are crucial in assuring safe deglutition, coughing, breathing, and voice production/speaking. Although several studies using neuroimaging techniques have demonstrated cortical activation related to pharyngeal and laryngeal functions, little is known regarding sensory projections from the laryngeal area to the somatosensory cortex. The purpose of this study was to establish the cortical activity evoked by somatic air-puff stimulation at the laryngeal mucosa using magnetoencephalography. Twelve healthy volunteers were trained to inhibit swallowing in response to air stimuli delivered to the larynx. Minimum norm estimates was performed on the laryngeal somatosensory evoked fields (LSEFs) to best differentiate the target activations from non-task-related activations. Evoked magnetic fields were recorded with acceptable reproducibility in the left hemisphere, with a peak latency of approximately 100ms in 10 subjects. Peak activation was estimated at the caudolateral region of the primary somatosensory area (S1). These results establish the ability to detect LSEFs with an acceptable reproducibility within a single subject and among subjects. These results also suggest the existence of laryngeal somatic afferent input to the caudolateral region of S1 in human. Our findings indicate that further investigation in this area is needed, and should focus on laryngeal lateralization, swallowing, and speech processing.
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Affiliation(s)
- Hideaki Miyaji
- Department of Otorhinolaryngology, Faculty of Medicine, Graduate School of Medical Sciences, Kyushu University, Japan; Department of Otorhinolaryngology, Yuaikai Oda Regional Medical Center, Japan.
| | - Naruhito Hironaga
- Department of Clinical Neurophysiology, Neurological Institute, Faculty of Medicine, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Toshiro Umezaki
- Department of Otorhinolaryngology, Faculty of Medicine, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Koichi Hagiwara
- Department of Clinical Neurophysiology, Neurological Institute, Faculty of Medicine, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hiroshi Shigeto
- Division of Epilepsy and Sleep Center, Fukuoka Sanno Hospital, Japan
| | - Motohiro Sawatsubashi
- Department of Otorhinolaryngology, Faculty of Medicine, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Shozo Tobimatsu
- Department of Clinical Neurophysiology, Neurological Institute, Faculty of Medicine, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Shizuo Komune
- Department of Otorhinolaryngology, Faculty of Medicine, Graduate School of Medical Sciences, Kyushu University, Japan
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Rossiter HE, Worthen SF, Witton C, Hall SD, Furlong PL. Gamma oscillatory amplitude encodes stimulus intensity in primary somatosensory cortex. Front Hum Neurosci 2013; 7:362. [PMID: 23874282 PMCID: PMC3711008 DOI: 10.3389/fnhum.2013.00362] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 06/24/2013] [Indexed: 01/26/2023] Open
Abstract
Gamma oscillations have previously been linked to pain perception and it has been hypothesized that they may have a potential role in encoding pain intensity. Stimulus response experiments have reported an increase in activity in the primary somatosensory cortex (SI) with increasing stimulus intensity, but the specific role of oscillatory dynamics in this change in activation remains unclear. In this study, Magnetoencephalography (MEG) was used to investigate the changes in cortical oscillations during four different intensities of a train of electrical stimuli to the right index finger, ranging from low sensation to strong pain. In those participants showing changes in evoked oscillatory gamma in SI during stimulation, the strength of the gamma power was found to increase with increasing stimulus intensity at both pain and sub-pain thresholds. These results suggest that evoked gamma oscillations in SI are not specific to pain but may have a role in encoding somatosensory stimulus intensity.
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Affiliation(s)
- H E Rossiter
- Aston Brain Centre, School of Life and Health Sciences, Aston University Birmingham, UK ; Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology London, UK
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Suntrup S, Teismann I, Wollbrink A, Winkels M, Warnecke T, Flöel A, Pantev C, Dziewas R. Magnetoencephalographic evidence for the modulation of cortical swallowing processing by transcranial direct current stimulation. Neuroimage 2013; 83:346-54. [PMID: 23800793 DOI: 10.1016/j.neuroimage.2013.06.055] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/25/2013] [Accepted: 06/17/2013] [Indexed: 12/12/2022] Open
Abstract
Swallowing is a complex neuromuscular task that is processed within multiple regions of the human brain. Rehabilitative treatment options for dysphagia due to neurological diseases are limited. Because the potential for adaptive cortical changes in compensation of disturbed swallowing is recognized, neuromodulation techniques like transcranial direct current stimulation (tDCS) are currently considered as a treatment option. Here we evaluate the effect of tDCS on cortical swallowing network activity and behavior. In a double-blind crossover study, anodal tDCS (20 min, 1 mA) or sham stimulation was administered over the left or right swallowing motor cortex in 21 healthy subjects in separate sessions. Cortical activation was measured using magnetoencephalography (MEG) before and after tDCS during cued "simple", "fast" and "challenged" swallow tasks with increasing levels of difficulty. Swallowing response times and accuracy were measured. Significant bilateral enhancement of cortical swallowing network activation was found in the theta frequency range after left tDCS in the fast swallow task (p=0.006) and following right tDCS in the challenged swallow task (p=0.007), but not after sham stimulation. No relevant behavioral effects were observed on swallow response time, but swallow precision improved after left tDCS (p<0.05). Anodal tDCS applied over the swallowing motor cortex of either hemisphere was able to increase bilateral swallow-related cortical network activation in a frequency specific manner. These neuroplastic effects were associated with subtle behavioral gains during complex swallow tasks in healthy individuals suggesting that tDCS deserves further evaluation as a treatment tool for dysphagia.
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Affiliation(s)
- Sonja Suntrup
- Institute for Biomagnetism and Biosignal Analysis, University of Muenster, Malmedyweg 15, 48149 Muenster, Germany; Department of Neurology, University of Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149 Münster, Germany.
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Suntrup S, Teismann I, Bejer J, Suttrup I, Winkels M, Mehler D, Pantev C, Dziewas R, Warnecke T. Evidence for adaptive cortical changes in swallowing in Parkinson's disease. Brain 2013; 136:726-38. [PMID: 23412935 DOI: 10.1093/brain/awt004] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Dysphagia is a relevant symptom in Parkinson's disease, whose pathophysiology is poorly understood. It is mainly attributed to degeneration of brainstem nuclei. However, alterations in the cortical contribution to deglutition control in the course of Parkinson's disease have not been investigated. Here, we sought to determine the patterns of cortical swallowing processing in patients with Parkinson's disease with and without dysphagia. Swallowing function in patients was objectively assessed with fiberoptic endoscopic evaluation. Swallow-related cortical activation was measured using whole-head magnetoencephalography in 10 dysphagic and 10 non-dysphagic patients with Parkinson's disease and a healthy control group during self-paced swallowing. Data were analysed applying synthetic aperture magnetometry, and group analyses were done using a permutation test. Compared with healthy subjects, a strong decrease of cortical swallowing activation was found in all patients. It was most prominent in participants with manifest dysphagia. Non-dysphagic patients with Parkinson's disease showed a pronounced shift of peak activation towards lateral parts of the premotor, motor and inferolateral parietal cortex with reduced activation of the supplementary motor area. This pattern was not found in dysphagic patients with Parkinson's disease. We conclude that in Parkinson's disease, not only brainstem and basal ganglia circuits, but also cortical areas modulate swallowing function in a clinically relevant way. Our results point towards adaptive cerebral changes in swallowing to compensate for deficient motor pathways. Recruitment of better preserved parallel motor loops driven by sensory afferent input seems to maintain swallowing function until progressing neurodegeneration exceeds beyond the means of this adaptive strategy, resulting in manifestation of dysphagia.
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Affiliation(s)
- Sonja Suntrup
- Institute for Biomagnetism and Biosignalanalysis, University of Muenster, Malmedyweg 15, 48149 Muenster, Germany.
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Feasibility of clinical magnetoencephalography (MEG) functional mapping in the presence of dental artefacts. Clin Neurophysiol 2012; 124:107-13. [PMID: 22832101 DOI: 10.1016/j.clinph.2012.06.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 06/14/2012] [Accepted: 06/18/2012] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the viability of MEG source reconstruction in the presence of large interference due to orthodontic material. METHODS We recorded the magnetic fields following a simple hand movement and following electrical stimulation of the median nerve (somatosensory evoked field -SEF). These two tasks were performed twice, once with and once without artificial dental artefacts. Temporal Signal Space Separation (tSSS) was applied to spatially filter the data and source reconstruction was performed according to standard procedures for pre-surgical mapping of eloquent cortex, applying dipole fitting to the SEF data and beamforming to the hand movement data. RESULTS Comparing the data with braces to the data without braces, the observed distances between the activations following hand movement in the two conditions were on average 6.4 and 4.5 mm for the left and right hand, respectively, whereas the dipole localisation errors for the SEF were 4.1 and 5.4 mm, respectively. Without tSSS it was generally not possible to obtain reliable dipole fit or beamforming results when wearing braces. CONCLUSION We confirm that tSSS is a required and effective pre-processing step for data recorded with the Elekta-MEG system. Moreover, we have shown that even the presence of large interference from orthodontic material does not significantly alter the results from dipole localisation or beamformer analysis, provided the data are spatially filtered by tSSS. SIGNIFICANCE State-of-the-art signal processing techniques enable the use of MEG for pre-surgical evaluation in a much larger clinical population than previously thought possible.
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Kervancioglu BB, Teismann IK, Rain M, Hugger S, Boeckmann JA, Young P, Schwindt W, Pantev C, Doering S. Sensorimotor cortical activation in patients with sleep bruxism. J Sleep Res 2012; 21:507-14. [PMID: 22404768 DOI: 10.1111/j.1365-2869.2012.01005.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Sleep bruxism is assumed to be triggered by a dysfunctional subcortical and cortical network. This study investigates sensorimotor cortical activation in patients with sleep bruxism during clenching and chewing. Nine polysomnographically diagnosed patients and nine healthy control subjects underwent magnetoencephalography (MEG). During clenching and chewing, patients with bruxism revealed significantly larger event-related desynchronization in the somatomotor area (Brodmann area 4) than healthy subjects. Group differences in the muscle activity were ruled out by electromyography (EMG) assessments during MEG. This result might be regarded as a consequence of increased sensorimotor cortical representation of the tongue and chewing musculature due to an enhanced parafunctional muscle activity in bruxers potentially triggered by occlusal factors. Alternatively, a secondary activation of cortical structures during sleep bruxism in the context of an activated network of subcortical and cortical structures might lead to increased cortical representation of the chewing musculature via use dependent plasticity.
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Affiliation(s)
- Bedia B Kervancioglu
- Department of Prosthodontics and Material Sciences, University of Münster, Münster, Germany
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Humbert IA, McLaren DG, Malandraki G, Johnson SC, Robbins J. Swallowing intentional off-state in aging and Alzheimer's disease: preliminary study. J Alzheimers Dis 2012; 26:347-54. [PMID: 21654061 DOI: 10.3233/jad-2011-110380] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Frontal cortical activation is elicited when subjects have been instructed not to initiate a sensorimotor task. The goal of this preliminary fMRI study was to examine BOLD response to a "Do Not Swallow" instruction (an intentional "off-state") in the context of other swallowing tasks in 3 groups of participants (healthy young, healthy old, and early Alzheimer's disease (AD)). Overall, the older group had larger, bilaterally active clusters in the cortex, including the dorsomedial prefrontal cortex during the intentional swallowing off-state; this region is commonly active in response inhibition studies. Disease-related differences were evident where the AD group had significantly greater BOLD response in the insula/operculum than the old. These findings have significant clinical implications for control of swallowing across the age span and in neurodegenerative disease. Greater activation in the insula/operculum for the AD group supports previous studies where this region is associated with initiating swallowing. The AD group may have required more effort to "turn off" swallowing centers to reach the intentional swallowing off-state.
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Affiliation(s)
- Ianessa A Humbert
- Department of Physical Medicine and Rehabilitation, Johns Hopkins University, Baltimore, MD, USA.
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Avivi-Arber L, Martin R, Lee JC, Sessle BJ. Face sensorimotor cortex and its neuroplasticity related to orofacial sensorimotor functions. Arch Oral Biol 2011; 56:1440-65. [DOI: 10.1016/j.archoralbio.2011.04.005] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 04/05/2011] [Accepted: 04/06/2011] [Indexed: 12/20/2022]
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Leopold NA, Daniels SK. Supranuclear control of swallowing. Dysphagia 2011; 25:250-7. [PMID: 19730940 DOI: 10.1007/s00455-009-9249-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Accepted: 08/13/2009] [Indexed: 12/20/2022]
Abstract
Swallowing is an act requiring complex sensorimotor integration. Using a variety of methods first used to study limb physiology, initial efforts to study swallowing have yielded information that multiple cortical and subcortical regions are active participants. Not surprisingly, the regions activated appear to overlap those involved in both oral and nonoral motor behaviors. This review offers a perspective that considers the supranuclear control of swallowing in light of these physiological similarities.
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Affiliation(s)
- Norman A Leopold
- Department of Medicine, Division of Neurology, Crozer-Chester Medical Center, Upland, PA 19013, USA.
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Teismann IK, Warnecke T, Suntrup S, Steinsträter O, Kronenberg L, Ringelstein EB, Dengler R, Petri S, Pantev C, Dziewas R. Cortical processing of swallowing in ALS patients with progressive dysphagia--a magnetoencephalographic study. PLoS One 2011; 6:e19987. [PMID: 21625445 PMCID: PMC3098861 DOI: 10.1371/journal.pone.0019987] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 04/20/2011] [Indexed: 11/29/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a rare disease causing degeneration of the upper and lower motor neuron. Involvement of the bulbar motor neurons often results in fast progressive dysphagia. While cortical compensation of dysphagia has been previously shown in stroke patients, this topic has not been addressed in patients suffering from ALS. In the present study, we investigated cortical activation during deglutition in two groups of ALS patients with either moderate or severe dysphagia. Whole-head MEG was employed on fourteen patients with sporadic ALS using a self-paced swallowing paradigm. Data were analyzed by means of time-frequency analysis and synthetic aperture magnetometry (SAM). Group analysis of individual SAM data was performed using a permutation test. We found a reduction of cortical swallowing related activation in ALS patients compared to healthy controls. Additionally a disease-related shift of hemispheric lateralization was observed. While healthy subjects showed bilateral cortical activation, the right sensorimotor cortex was predominantly involved in ALS patients. Both effects were even stronger in the group of patients with severe dysphagia. Our results suggest that bilateral degeneration of the upper motor neuron in the primary motor areas also impairs further adjusted motor areas, which leads to a strong reduction of ‘swallowing related’ cortical activation. While both hemispheres are affected by the degeneration a relatively stronger activation is seen in the right hemisphere. This right hemispheric lateralization of volitional swallowing observed in this study may be the only sign of cortical plasticity in dysphagic ALS patients. It may demonstrate compensational mechanisms in the right hemisphere which is known to predominantly coordinate the pharyngeal phase of deglutition. These results add new aspects to our understanding of the pathophysiology of dysphagia in ALS patients and beyond. The compensational mechanisms observed could be relevant for future research in swallowing therapies.
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Affiliation(s)
- Inga K Teismann
- Department of Neurology, University of Muenster, Muenster, Germany.
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Teismann IK, Suntrup S, Warnecke T, Steinsträter O, Fischer M, Flöel A, Ringelstein EB, Pantev C, Dziewas R. Cortical swallowing processing in early subacute stroke. BMC Neurol 2011; 11:34. [PMID: 21392404 PMCID: PMC3061896 DOI: 10.1186/1471-2377-11-34] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Accepted: 03/11/2011] [Indexed: 08/26/2023] Open
Abstract
Background Dysphagia is a major complication in hemispheric as well as brainstem stroke patients causing aspiration pneumonia and increased mortality. Little is known about the recovery from dysphagia after stroke. The aim of the present study was to determine the different patterns of cortical swallowing processing in patients with hemispheric and brainstem stroke with and without dysphagia in the early subacute phase. Methods We measured brain activity by mean of whole-head MEG in 37 patients with different stroke localisation 8.2 +/- 4.8 days after stroke to study changes in cortical activation during self-paced swallowing. An age matched group of healthy subjects served as controls. Data were analyzed by means of synthetic aperture magnetometry and group analyses were performed using a permutation test. Results Our results demonstrate strong bilateral reduction of cortical swallowing activation in dysphagic patients with hemispheric stroke. In hemispheric stroke without dysphagia, bilateral activation was found. In the small group of patients with brainstem stroke we observed a reduction of cortical activation and a right hemispheric lateralization. Conclusion Bulbar central pattern generators coordinate the pharyngeal swallowing phase. The observed right hemispheric lateralization in brainstem stroke can therefore be interpreted as acute cortical compensation of subcortically caused dysphagia. The reduction of activation in brainstem stroke patients and dysphagic patients with cortical stroke could be explained in terms of diaschisis.
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Affiliation(s)
- Inga K Teismann
- Department of Neurology, University of Muenster, Albert-Schweitzer-Str,33, 48149 Muenster, Germany.
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Worthen SF, Hobson AR, Hall SD, Aziz Q, Furlong PL. Primary and secondary somatosensory cortex responses to anticipation and pain: a magnetoencephalography study. Eur J Neurosci 2011; 33:946-59. [DOI: 10.1111/j.1460-9568.2010.07575.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Teismann IK, Steinstraeter O, Schwindt W, Ringelstein EB, Pantev C, Dziewas R. Age-related changes in cortical swallowing processing. Neurobiol Aging 2010; 31:1044-50. [DOI: 10.1016/j.neurobiolaging.2008.07.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2007] [Revised: 06/30/2008] [Accepted: 07/02/2008] [Indexed: 11/24/2022]
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