On crossed apraxia. Description of a right-handed apraxic patient with right supplementary motor area damage

Clelia Marchetti, Sergio Della Sala

Research output: Contribution to journalArticlepeer-review

Abstract

GP, a right-handed woman, without evidence of familial left-handedness, showed clear cut bilateral ideo-motor apraxia and oro-facial apraxia after a vascular lesion of the right hemisphere, encroaching upon the fronto-mesial region. She scored normally in most other cognitive tests, including language, but showed signs of callosal disconnection, left anarchic hand and mild unilateral spatial neglect. This cognitive profile points to the possibility of praxis being localized to the right hemisphere in this right-handed patient. We argue in favour of individual variability of praxis dominance, and maintain that this dominance might be completely right-sided in some subjects. Moreover the anatomical locus of GP's lesion points to the possible role that the frontal lobes (and more specifically the Supplementary Motor Area) play in the genesis of apraxia.

Original languageEnglish
Pages (from-to)341-354
Number of pages14
JournalCortex
Volume33
Issue number2
Publication statusPublished - 1997

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Neuropsychology and Physiological Psychology
  • Cognitive Neuroscience
  • Neuroscience(all)

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