The relationship between parkinsonian rigidity and hypokinesia in the orofacial system
A quantitative analysis
Abstract
Muscle rigidity was quantified in the labial muscles of parkinsonian and normal subjects by applying known forces and observing the resultant displacements to determine labial stiffness coefficients. In parallel, labial speech movements were observed from these same subjects to evaluate hypokinesia. Labial rigidity was consistently correlated with decrements in the range of lip movement. EMG from orbicularis oris and mentalis muscles indicated a causal relationship between rigidity and hypokinesia.
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© 1982 by the American Academy of Neurology.
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Published online: July 1, 1982
Published in print: July 1982
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- Mechanisms of Swallowing, Speech and Voice Disorders in Parkinson’s Disease: Literature Review with Our First Evidence for the Periperal Nervous System Involvement, Dysphagia, (2024).https://doi.org/10.1007/s00455-024-10693-3
- Automated video-based assessment of facial bradykinesia in de-novo Parkinson’s disease, npj Digital Medicine, 5, 1, (2022).https://doi.org/10.1038/s41746-022-00642-5
- A Study on the Possible Diagnosis of Parkinson’s Disease on the Basis of Facial Image Analysis, Electronics, 10, 22, (2832), (2021).https://doi.org/10.3390/electronics10222832
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- Sources of Intraspeaker Variation in Parkinsonian Speech Related to Speaking Style, Automatic Assessment of Parkinsonian Speech, (24-41), (2021).https://doi.org/10.1007/978-3-030-65654-6_2
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