The swallowing and voicing characteristics of pharyngeal dystonia: a single case report.

The swallowing and voicing characteristics of pharyngeal dystonia: a single case report. Research Abstract Details 

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The swallowing and voicing characteristics of pharyngeal dystonia: a single case report. Abstract Text:

L Kahn,H Jordaan,

This paper describes the swallowing difficulty and abnormal voicing characteristics of a subject with pharyngeal dystonia. This rare form of dystonia, considered to be a neurological condition resulting in involuntary spasm of the muscles of the pharynx, has not been documented in terms of its effects on the acoustic properties of the voice. This study revealed that during pharyngeal spasm, there are significant delays in voice onset time, a reduction in fundamental frequency, an increased percentage of sub-harmonics and variability in the amplitude perturbation quotient as well as shimmer. There was also evidence of these characteristics during periods of 'spasm-free' voice production, suggesting that the condition might be more consistent than what the subject described. Resonance disturbances were observed in spasm, which might explain the 'hollow' and affected voice quality. The subject also reported severe swallowing difficulties during the periods of spasm, characterised by a tight constriction at the level of the subject's throat. It is clear that an abnormality at the level of the cricopharyngeal muscle has a dual effect on the acoustic properties of the voice and on swallowing.

The swallowing and voicing characteristics of pharyngeal dystonia: a single case report. Publishing Authors By Initials

L Kahn,H Jordaan,

For similar respiratory tract diseases: laryngeal diseases: voice disorders research abstracts see: respiratory tract diseases: laryngeal diseases: voice disorders research

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The swallowing and voicing characteristics of pharyngeal dystonia: a single case report. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The South African journal of communication disorde

VOLUME: 48

Page Numbers: 21-31

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ISSN: 0379-8046

DAY: 12

MONTH: 02

YEAR: 2001

The swallowing and voicing characteristics of pharyngeal dystonia: a single case report. Information

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LANGUAGE: eng

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The swallowing and voicing characteristics of pharyngeal dystonia: a single case report. Keywords Mesh Terms:

KEYWORDS: Voice Disorders

MESH TERMS: physiopathology

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Grant and Affiliation Information for The swallowing and voicing characteristics of pharyngeal dystonia: a single case report.

AFFILIATION: Department of Speech Pathology and Audiology, University of the Witwatersrand, Johannesburg, South Africa.

Country: South Africa

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MEDLINETA: S Afr J Commun Disord

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