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Dziewas R, Warnecke T, Labeit B, Claus I, Muhle P, Oelenberg S, Ahring S, Wüller C, Jung A, von Itter J, Suntrup-Krueger S. Systematic approach to contextualize findings of flexible endoscopic evaluation of swallowing in neurogenic dysphagia- towards an integrated FEES report. Neurol Res Pract 2024; 6:26. [PMID: 38720388 PMCID: PMC11080162 DOI: 10.1186/s42466-024-00321-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 04/01/2024] [Indexed: 05/12/2024] Open
Abstract
Flexible endoscopic evaluation of swallowing (FEES) is one of the most important methods for instrumental swallowing evaluation. The most challenging part of the examination consists in the interpretation of the various observations encountered during endoscopy and in the deduction of clinical consequences. This review proposes the framework for an integrated FEES-report that systematically moves from salient findings of FEES to more advanced domains such as dysphagia severity, phenotypes of swallowing impairment and pathomechanisms. Validated scales and scores are used to enhance the diagnostic yield. In the concluding part of the report, FEES-findings are put into the perspective of the clinical context. The potential etiology of dysphagia and conceivable differential diagnoses are considered, further diagnostic steps are proposed, treatment options are evaluated, and a timeframe for re-assessment is suggested. This framework is designed to be adaptable and open to continuous evolution. Additional items, such as novel FEES protocols, pathophysiological observations, advancements in disease-related knowledge, and new treatment options, can be easily incorporated. Moreover, there is potential for customizing this approach to report on FEES in structural dysphagia.
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Affiliation(s)
- Rainer Dziewas
- Department of Neurology and Neurorehabilitation, Klinikum Osnabrück- Academic Teaching Hospital of the University of Münster, Am Finkenhügel 1, 49076, Osnabrück, Germany.
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany.
| | - Tobias Warnecke
- Department of Neurology and Neurorehabilitation, Klinikum Osnabrück- Academic Teaching Hospital of the University of Münster, Am Finkenhügel 1, 49076, Osnabrück, Germany
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
| | - Bendix Labeit
- Department of Neurology, Medical Faculty, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Inga Claus
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
| | - Paul Muhle
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
| | - Stephan Oelenberg
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
| | - Sigrid Ahring
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
| | - Christina Wüller
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
| | - Anne Jung
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
| | - Jonas von Itter
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
| | - Sonja Suntrup-Krueger
- Department of Neurology with Institute for Translational Neurology, University Hospital Münster, Münster, Germany
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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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Martinez-Nunez AE, Sarmento FP, Chandra V, Hess CW, Hilliard JD, Okun MS, Wong JK. Management of essential tremor deep brain stimulation-induced side effects. Front Hum Neurosci 2024; 18:1353150. [PMID: 38454907 PMCID: PMC10918853 DOI: 10.3389/fnhum.2024.1353150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 02/01/2024] [Indexed: 03/09/2024] Open
Abstract
Deep brain stimulation (DBS) is an effective surgical therapy for carefully selected patients with medication refractory essential tremor (ET). The most popular anatomical targets for ET DBS are the ventral intermedius nucleus (VIM) of the thalamus, the caudal zona incerta (cZI) and the posterior subthalamic area (PSA). Despite extensive knowledge in DBS programming for tremor suppression, it is not uncommon to experience stimulation induced side effects related to DBS therapy. Dysarthria, dysphagia, ataxia, and gait impairment are common stimulation induced side effects from modulation of brain tissue that surround the target of interest. In this review, we explore current evidence about the etiology of stimulation induced side effects in ET DBS and provide several evidence-based strategies to troubleshoot, reprogram and retain tremor suppression.
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Affiliation(s)
- Alfonso Enrique Martinez-Nunez
- Norman Fixel Institute for Neurological Diseases, Gainesville, FL, United States
- Department of Neurology, University of Florida, Gainesville, FL, United States
| | - Filipe P. Sarmento
- Norman Fixel Institute for Neurological Diseases, Gainesville, FL, United States
| | - Vyshak Chandra
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
| | - Christopher William Hess
- Norman Fixel Institute for Neurological Diseases, Gainesville, FL, United States
- Department of Neurology, University of Florida, Gainesville, FL, United States
| | - Justin David Hilliard
- Norman Fixel Institute for Neurological Diseases, Gainesville, FL, United States
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
| | - Michael S. Okun
- Norman Fixel Institute for Neurological Diseases, Gainesville, FL, United States
- Department of Neurology, University of Florida, Gainesville, FL, United States
| | - Joshua K. Wong
- Norman Fixel Institute for Neurological Diseases, Gainesville, FL, United States
- Department of Neurology, University of Florida, Gainesville, FL, United States
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Reitz SC, Luger S, Lapa S, Eibach M, Filmann N, Seifert V, Weise L, Klein JC, Kang JS, Baudrexel S, Quick-Weller J. Comparing Programming Sessions of Vim-DBS. Front Neurol 2020; 11:987. [PMID: 33013651 PMCID: PMC7494809 DOI: 10.3389/fneur.2020.00987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/28/2020] [Indexed: 11/13/2022] Open
Abstract
Background: Essential Tremor (ET) is a progressive neurological disorder characterized by postural and kinetic tremor most commonly affecting the hands and arms. Medically intractable ET can be treated by deep brain stimulation (DBS) of the ventral intermediate nucleus of thalamus (VIM). We investigated whether the location of the effective contact (most tremor suppression with at least side effects) in VIM-DBS for ET changes over time, indicating a distinct mechanism of loss of efficacy that goes beyond progression of tremor severity, or a mere reduction of DBS efficacy. Methods: We performed programming sessions in 10 patients who underwent bilateral vim-DBS surgery between 2009 and 2017 at our department. In addition to the intraoperative (T1) and first clinical programming session (T2) a third programming session (T3) was performed to assess the effect- and side effect threshold (minimum voltage at which a tremor suppression or side effects occurred). Additionally, we compared the choice of the effective contact between T1 and T2 which might be affected by a surgical induced “brain shift.” Discussion: Over a time span of about 4 years VIM-DBS in ET showed continuous efficacy in tremor suppression during stim-ON compared to stim-OFF. Compared to immediate postoperative programming sessions in ET-patients with DBS, long-term evaluation showed no relevant change in the choice of contact with respect to side effects and efficacy. In the majority of the cases the active contact at T2 did not correspond to the most effective intraoperative stimulation site T1, which might be explained by a brain-shift due to cerebral spinal fluid loss after neurosurgical procedure.
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Affiliation(s)
- Sarah C Reitz
- Department of Neurology, University Hospital, Frankfurt, Germany
| | - Sebastian Luger
- Department of Neurology, University Hospital, Frankfurt, Germany
| | - Sriramya Lapa
- Department of Neurology, University Hospital, Frankfurt, Germany
| | - Michael Eibach
- Department of Neurosurgery, University Hospital, Frankfurt, Germany
| | - Natalie Filmann
- Division of Neurosurgery, Dalhouse University Halifax, Halifax, NS, Canada.,Institute of Biostatistics and Mathematical Modeling, University Hospital, Goethe University, Frankfurt, Germany
| | - Volker Seifert
- Department of Neurosurgery, University Hospital, Frankfurt, Germany
| | - Lutz Weise
- Division of Neurosurgery, Dalhouse University Halifax, Halifax, NS, Canada
| | - Johannes C Klein
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
| | - Jun-Suk Kang
- Department of Neurology, University Hospital, Frankfurt, Germany
| | - Simon Baudrexel
- Department of Neurology, University Hospital, Frankfurt, Germany
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