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The Roots of Cognitive NeuroscienceBehavioral Neurology and Neuropsychology$
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Anjan Chatterjee and H. Branch Coslett

Print publication date: 2013

Print ISBN-13: 9780195395549

Published to Oxford Scholarship Online: January 2014

DOI: 10.1093/acprof:oso/9780195395549.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 03 December 2021

Limb Apraxia

Limb Apraxia

A Disorder of Goal-Directed Actions

(p.187) Chapter 9 Limb Apraxia
The Roots of Cognitive Neuroscience

Anne L. Foundas

Oxford University Press

Apraxia comprises a wide-spectrum of higher order motor disorders that affect the performance of learned skilled movements. This chapter focuses on limb apraxia and the nature of the spatiotemporal errors that disrupt movement sequences. Cognitive process models are discussed including the Heilman-Rothi dual-component model. This model attempts to reconcile conceptual and preparatory aspects of the motor program with perceptual and kinematic features. Critical to this model is the concept that discrete storage modules contain information pertaining to the visual analysis and recognition of movements and objects, and for the execution of the motor patterns associated with specific movements. Sophisticated neuroimaging methods have been used to visualize the anatomic basis of these intact and disordered praxis functions and will be reviewed to present an updated anatomical model emphasizing the praxis production system.

Keywords:   apraxia, limb apraxia, ideomotor apraxia, kinematics, laterality, hemispheric specialization

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