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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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Approaching apraxia from the motor side

Approaching apraxia from the motor side

Chapter:
(p.191) Chapter 13 Approaching apraxia from the motor side
Source:
Apraxia
Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199591510.003.0013

Essentially, two approaches have been undertaken for documenting and analyzing motor mechanisms at the micro level that possibly underlie the visible errors justifying a diagnosis of apraxia: kinematic measurement of the gestures and actions produced in the examination of apraxia, and experimental investigation of more simple and “elemental” motor actions like pointing and grasping by patients with brain damage and apraxia. Both reveal abnormalities in motor control of the left hand in patients with left brain lesions, but they do not correlate with the severity of apraxia. Presumably they reflect a role of the left hemisphere for bilateral motor control in right-handed subjects, but this dominance has a different substrate within the hemisphere than the functions whose disturbance causes clinical manifestations of apraxia.

Keywords:   motor control, kinematics, grip selection, grasping, pointing, apraxia

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