Selective,Non-lateralized Impairment of Motor Imagery Following Right Parietal Damage |
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| Authors: | Herbert Pickell Edward Klima Tracy Love Mark Kritchevsky Ursula Bellugi Gregory Hickok |
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| Affiliation: | 1. Laboratory for Cognitive Neuroscience, The Salk Institute , La Jolla, CA, USA pickell@Icn.salk.edu;3. Laboratory for Cognitive Neuroscience, The Salk Institute , La Jolla, CA, USA;4. Laboratory for Research on Aphasia and Stroke, Department of Psychology , University of California , San Diego, La Jolla, California, USA;5. Department of Neurosciences , University of California , San Diego, La Jolla, CA, USA;6. VA San Diego Healthcare System , San Diego, CA, USA;7. Department of Cognitive Science , University of California , Irvine |
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| Abstract: | Recent lesion studies have shown that left hemisphere lesions often give rise to frank sign language aphasias in deaf signers, whereas right hemisphere lesions do not, suggesting similar patterns of hemispheric asymmetry for signed and spoken language. We present here a case of a left-handed, deaf, life-long signer who became aphasic after a right-hemisphere lesion. The subject exhibits deficits in sign language comprehension and production typically associated with left hemisphere damaged signers. He also exhibits evidence of local versus global deficits similar to left-hemisphere lesioned hearing patients. This case represents reversed lateralization for sign language and also may represent reversed lateralization for visuo-spatial abilities in a deaf signer. |
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