Perceptual Disorders of Adults with Hemiparesis

Description of a left/right coding deficit in a case of constructional apraxia

“…It is also typically assumed that left-sided lesions disrupt the programming or ordering of movements necessary for constructional activity (HCcaen & Assal, 1970), whereas visuospatial defects tend to underlie right-hemisphere constructional apraxias (Blakemore, Iverson, & Zangwill, 1972). Left-right disorientation has been found to be closely associated with left brain damage and in particular with receptive disorders of language (Benton, 1959;Lucas, 1969;Poeck & Orgass, 1967;Sanguet, Benton, & HCcaen, 1971). However, the association of left-right disorientation and aphasia may solely be the result of anatomical contiguity of the relevant processing areas, as patients may be demonstrated whose aphasic symptoms have recovered to a great extent but who still show severe impairment of left-right discriminations (Rosati, De Bastiani, & Pinna, 1979).…”