The different types of limb apraxia errors made by patients with left vs. right hemisphere damage |
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Authors: | K. York Haaland David Flaherty |
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Affiliation: | 1. Department of Psychology, Veterans Administration Medical Center, Albuquerque, U.S.A.;2. University of New Mexico U.S.A. |
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Abstract: | Limb apraxia errors were compared among normal controls and right- or left-hemisphere-damaged patients as they imitated gestures with the ipsilateral hand. Both brain-damaged groups made similar errors on nonrepresentative and representative/intransitive movements. In contrast for pretended object use movements (transitive), the left-hemisphere-damaged group made more arm position and classical body-part-as-object errors while the right hemisphere group made as many partial errors and more less-primitive, body-part-as-object errors than the left-hemisphere-damaged group. These results help explain why a certain percentage of right-hemisphere-damaged patients are labeled apraxic, but also suggest that the left hemisphere is more important for integrating intrapersonal space and the “representation” of extrapersonal space. |
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Keywords: | Address all requests for reprints and correspondence to K. Y. Haaland Ph.D. Psychology Service (116B) Veterans Administration Medical Center 2100 Ridgecrest Drive SE Albuquerque NM 87108. |
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