A CRITICAL-REVIEW OF MENTAL-IMAGERY DEFECTS

A critical, clinical review of single-case reports and group studies o n visual mental imagery deficits is offered. Neuropsychological findin gs demonstrate that mental imagery relies upon dissociable processes w hich are localized in left-hemisphere posterior areas. Imagery defects thus may often be associated with visual recognition and naming impai rments. On the other hand, the right hemisphere seems to play an analo gous role in imagery and perception. Current theoretical models of ima gery do not appear fully capable of accounting for available clinical data. (C) 1994 Academic Press, Inc.