{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T21:08:27Z","timestamp":1768511307503,"version":"3.49.0"},"reference-count":100,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T00:00:00Z","timestamp":1768435200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Aging Neurosci."],"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>\n                      Oropharyngeal dysphagia (OD) is a common and significant complication of Parkinson\u2019s disease (PD), contributing to malnutrition, respiratory complications and impaired medication intake. The pathophysiology of OD in PD is heterogeneous, involving basal ganglia dysfunction with associated motor impairments in the oropharynx, cortical pathophysiology, and\n                      <jats:italic>\u03b1<\/jats:italic>\n                      -synuclein pathology in peripheral nerves. While deep brain stimulation (DBS) is an established intervention for motor symptom management in PD, its effects on swallowing function remain poorly understood and controversial. This narrative review aims to critically evaluate the current evidence on the effects of DBS on OD in PD and to outline potential future research directions, grounded in current understanding of OD pathophysiology and DBS mechanisms.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A narrative review of clinical studies examining the effects of DBS on swallowing function in people with PD was conducted. Studies were identified through database searching of MEDLINE, Embase and Cochrane Library, from inception of the databases until May 2025. Inclusion criteria encompassed clinical studies and case reports investigating DBS effects on swallowing outcomes in people with PD, with no language restrictions applied. Data regarding study design, DBS intervention and stimulation parameters, swallow-related outcomes and assessment methods were extracted and compiled systematically.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>A total of 24 clinical studies, including prospective and retrospective observational studies and case reports, were included in this review. Evidence regarding DBS effects remains inconsistent. Subthalamic DBS shows the greatest variability: some studies report improvements in aspiration frequency or pharyngeal timing, while others describe no change or even long-term deterioration in swallowing safety. Pallidal DBS appears to neither improve nor deteriorate swallowing function, however, evidence is limited to four mainly retrospective studies with small sample sizes. Evidence on combined or alternative targets remains sparse and heterogeneous. Patient-reported swallowing outcomes are often more favorable than instrumental measures.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>DBS may influence swallowing in PD, but outcomes likely depend on OD phenotypes, stimulation targets and parameters. Future research should recruit adequately powered cohorts, apply standardized instrumental assessments including detailed OD phenotyping, systematically explore stimulation parameters, distinguish short- from long-term effects, and integrate OD outcomes into DBS programming.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fnagi.2025.1734432","type":"journal-article","created":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T06:24:30Z","timestamp":1768458270000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Effect of deep brain stimulation on dysphagia in Parkinson\u2019s disease: mechanisms, evidence, and outlook"],"prefix":"10.3389","volume":"17","author":[{"given":"Jule","family":"Hofacker","sequence":"first","affiliation":[{"name":"Department of Neurology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bahne H.","family":"Bahners","sequence":"additional","affiliation":[{"name":"Department of Neurology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]},{"name":"Medical Faculty and University Hospital Duesseldorf, Institute of Clinical Neuroscience and Medical Psychology, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cinja","family":"Huber","sequence":"additional","affiliation":[{"name":"Department of Neurology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christian J.","family":"Hartmann","sequence":"additional","affiliation":[{"name":"Department of Neurology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]},{"name":"Medical Faculty and University Hospital Duesseldorf, Institute of Clinical Neuroscience and Medical Psychology, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Inga","family":"Claus","sequence":"additional","affiliation":[{"name":"Department of Neurology, University Hospital Muenster","place":["Muenster, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sonja","family":"Suntrup-Krueger","sequence":"additional","affiliation":[{"name":"Department of Neurology, University Hospital Muenster","place":["Muenster, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alfons","family":"Schnitzler","sequence":"additional","affiliation":[{"name":"Medical Faculty and University Hospital Duesseldorf, Institute of Clinical Neuroscience and Medical Psychology, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tobias","family":"Warnecke","sequence":"additional","affiliation":[{"name":"Department of Neurology and Neurorehabilitation, Klinikum Osnabrueck \u2013 Academic Teaching Hospital of the WWU","place":["Muenster, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bendix","family":"Labeit","sequence":"additional","affiliation":[{"name":"Department of Neurology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]},{"name":"Medical Faculty and University Hospital Duesseldorf, Institute of Clinical Neuroscience and Medical Psychology, Heinrich-Heine University Duesseldorf","place":["Duesseldorf, Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2026,1,15]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"444","DOI":"10.1007\/s00335-025-10128-w","article-title":"Alpha-synuclein pathology and Parkinson\u2019s disease-related olfactory dysfunctions: an update on preclinical models and therapeutic approaches","volume":"36","author":"Abraham","year":"2025","journal-title":"Mamm. 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