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ApraxiaThe Cognitive side of motor control$
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Georg Goldenberg

Print publication date: 2013

Print ISBN-13: 9780199591510

Published to Oxford Scholarship Online: September 2013

DOI: 10.1093/acprof:oso/9780199591510.001.0001

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Callosal apraxia and intermanual conflict

Callosal apraxia and intermanual conflict

(p.202) Chapter 14 Callosal apraxia and intermanual conflict
Oxford University Press

The renaissance of the localizing approach to brain function was accompanied by a rediscovery of the reality of unilateral apraxia after destruction of the corpus callosum. Whereas apraxia for communicative gestures on command is permanent, defective imitation recovers on clinical examination but can be demonstrated by unilateral presentation of stimuli. Intermanual conflicts due to unintended actions of the apraxic hand have been interpreted as manifestation of conflicting intentions of disconnected hemispheres. On scrutiny, however, the majority of them seem to be due to the propensity of the disobedient hand to perform actions that are intended to be performed by the other hand. If ascribing a mental state to the disobedient hand is desired, it might be overzealousness rather than mischief

Keywords:   callosal disconnection, intermanual conflict, apraxia, imitation, pantomime of tool use, hemisphere rivalry

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