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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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Apraxia in left-handers

Apraxia in left-handers

(p.184) Chapter 12 Apraxia in left-handers
Oxford University Press

In typical right-handers apraxia is predominantly bound to left-hemisphere lesions. This lateralization corresponds with that of language and that of motor control of the dominant hand. In left-handers the right hand is by definition in control of the dominant hand but lateralization of language can vary and is indeed more frequently in the left than in the right hemisphere. This situation raises the opportunity to probe which of the two associations in the typical brain is more important for the lateralization of apraxia. A study of consecutive left-handed patients with unilateral lesions revealed that the probability of defective pantomime is higher in patients with aphasia, and that of defective imitation higher in patients with right-hemisphere lesions and hemineglect, but that neither of these associations is mandatory. The laterality of lesions causing apraxia can dissociate both from aphasia and from handedness.

Keywords:   left-hander, handedness, aphasia, apraxia, pantomime, imitation, hemineglect

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