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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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The decline of diagrams

The decline of diagrams

(p.41) Chapter 3 The decline of diagrams
Oxford University Press

In the middle of the twentieth century Liepmann’s theories of apraxia lost their dominance. Alternative theories of apraxia were influenced by the ‘holistic’ doctrine which denied the validity of anatomical localization for explaining mental symptoms of brain damage. Apraxia was identified with a weakness of voluntary action control which abolishes the autonomy of action and renders the patient victim of primitive action routines and environmental influences. ‘Constructional apraxia’ was recognized as a further variant of apraxia, but was soon integrated into the growing field of disorders of spatial thinking. Unilaterally left-sided apraxia following destruction of the corpus callosum had been a central piece of evidence for Liepmann’s model of apraxia and for the localization of brain function in general. Its credibility was called into doubts when the examination of patients with surgical section of the corpus callosum failed to detect lasting apraxia of the left limbs.

Keywords:   holism, constructional apraxia, dressing apraxia, consciousness, automatic versus voluntary control, visuo-spatial, corpus callosum, callosal disconnection

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