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KMID : 0960920030020010084
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Dementia and Neurocognitive Disorders
2003 Volume.2 No. 1 p.84 ~ p.87
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A Case of Spasmodic Dysphonia After a Right Hemispheric Lesion
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Kwon Mi-Seon
Sim Hyun-Sub
Chung Sun-Ju
Lee Jae-Hong
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Abstract
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Spasmodic dysphonia (SD) is a kind of focal dystonia of larynx and it is classified into three subtypes: adductor type, abductor type, and mixed type. The etiology of SD is not clearly known yet. Cortical dysfunction is regarded as one of the causes of SD based on the clinical data in which patients who showed SD due to the lesion of the central nervous system. The lesions documented so far involve the basal ganglia, supplementary motor area, and thalamus in the dominant hemisphere. We report an unusual case with SD after an ischemic lesion of the precentral gyrus in the right hemisphere, which is rarely mentioned in relation to SD. The characteristics of the symptoms and cortical functions in phonation are discussed.
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KEYWORD
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Spasmodic dysphonia, Focal dystonia, Cortical lesion
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