The relationship between parkinsonian rigidity and hypokinesia in the orofacial system: A quantitative analysis

Chauncey J. Hunker; James H. Abbs; Steven M. Barlow

doi:10.1212/wnl.32.7.749

The relationship between parkinsonian rigidity and hypokinesia in the orofacial system: A quantitative analysis

Chauncey J. Hunker, James H. Abbs, Steven M. Barlow

Research output: Contribution to journal › Article › peer-review

93 Scopus citations

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.

Original language	English (US)
Pages (from-to)	755-761
Number of pages	7
Journal	Neurology
Volume	32
Issue number	7
DOIs	https://doi.org/10.1212/wnl.32.7.749
State	Published - Jul 1982
Externally published	Yes

ASJC Scopus subject areas

Clinical Neurology

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The relationship between parkinsonian rigidity and hypokinesia in the orofacial system: A quantitative analysis

Abstract

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