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Smith-Hublou M, Herndon N, Wong JK, Ramirez-Zamora A, Wheeler-Hegland K. Impacts of Deep Brain Stimulation of the Globus Pallidus Internus on Swallowing: A Retrospective, Cross-Sectional Study. Dysphagia 2024:10.1007/s00455-023-10660-4. [PMID: 38236261 DOI: 10.1007/s00455-023-10660-4] [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: 09/17/2022] [Accepted: 12/16/2023] [Indexed: 01/19/2024]
Abstract
Deep brain stimulation (DBS) is a common treatment for motor symptoms of Parkinson disease (PD), a condition associated with increased risk of dysphagia. The effect of DBS on swallowing function has not been comprehensively evaluated using gold-standard imaging techniques, particularly for globus pallidus internus (GPi) DBS. The objective of this retrospective, cross-sectional study was to identify differences in swallowing safety and timing kinematics among PD subjects with and without GPi DBS. We investigated the effects of unilateral and bilateral GPi DBS as well as the relationship between swallowing safety and DBS stimulation parameters, using retrospective analysis of videofluoroscopy recordings (71 recordings from 36 subjects) from electronic medical records. Outcomes were analyzed by surgical status (pre-surgical, unilateral DBS, bilateral DBS). The primary outcome was percent of thin-liquid bolus trials rated as unsafe, with Penetration-Aspiration Scale scores of 3 or higher. Secondary analyses included swallowing timing measures, relationships between swallowing safety and DBS stimulation parameters, and Dynamic Imaging Grade of Swallowing Toxicity ratings. Most subjects swallowed all boluses safely (19/29 in the pre-surgical, 16/26 in the unilateral DBS, and 10/16 in the bilateral DBS conditions). Swallowing safety impairment did not differ among stimulation groups. There was no main effect of stimulation condition on timing metrics, though main effects were found for sex and bolus type. Stimulation parameters were not correlated with swallowing safety. Swallowing efficiency and overall impairment did not differ among conditions. These results provide evidence that GPi DBS does not affect pharyngeal swallowing function. Further, prospective, investigations are needed.
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Affiliation(s)
- May Smith-Hublou
- Laboratory for the Study of Upper Airway Dysfunction, University of Florida, 1225 Center Drive, PO Box 100174, Gainesville, FL, 32603, USA.
- Department of Speech, Language, and Hearing Sciences, University of Florida, 1225 Center Drive, PO Box 100174, Gainesville, FL, 32603, USA.
- UF Health Rehab Center at the Norman Fixel Institute for Neurological Diseases, 3009 Williston Road, Gainesville, FL, 32608, USA.
| | - Nicole Herndon
- Department of Speech, Language, and Hearing Sciences, University of Florida, 1225 Center Drive, PO Box 100174, Gainesville, FL, 32603, USA
- UF Health Rehab Center at the Norman Fixel Institute for Neurological Diseases, 3009 Williston Road, Gainesville, FL, 32608, USA
| | - Joshua K Wong
- Department of Neurology, Norman Fixel Institute for Neurological Diseases, University of Florida, Gainesville, FL, USA
| | - Adolfo Ramirez-Zamora
- Department of Neurology, Norman Fixel Institute for Neurological Diseases, University of Florida, Gainesville, FL, USA
| | - Karen Wheeler-Hegland
- Laboratory for the Study of Upper Airway Dysfunction, University of Florida, 1225 Center Drive, PO Box 100174, Gainesville, FL, 32603, USA
- Department of Speech, Language, and Hearing Sciences, University of Florida, 1225 Center Drive, PO Box 100174, Gainesville, FL, 32603, USA
- Department of Neurology, Norman Fixel Institute for Neurological Diseases, University of Florida, Gainesville, FL, USA
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