Date of Award

1999

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Psychology

First Advisor

William Drew Gouvier

Abstract

Ideomotor apraxia is a disorder of learned skilled movement which typically has been attributed to damage confined predominantly to the frontal and parietal cortical areas within the hemisphere dominant for speech. However, most studies of the anatomical basis of apraxia have relied on case studies or have only approximate lesion localization, and few studies have examined motor performance in relation to lesion location. This study examined the relationship of apraxia severity to lesion location (in both cortical/subcortical dimensions and anterior/posterior dimensions), aphasia, motor performance, and task demands, and identified the existence of subtypes of apraxia with characteristic performance profiles (error types) with respect to lesion location. The findings indicate that severe impairment in praxis is more likely after cortical lesions, although the results indicate that milder forms of apraxia which differ in a qualitative fashion may also occur after subcortical lesions.

ISBN

9780599548640

Pages

179

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