PMID: 6536330Jul 1, 1984Paper

Visual-spatial processing in deaf brain-damaged signers

Brain and Cognition
H PoiznerC A Padden

Abstract

Sign language displays all the complex linguistic structure found in spoken languages, but conveys its syntax in large part by manipulating spatial relations. This study investigated whether deaf signers who rely on a visual-spatial language nonetheless show a principled cortical separation for language and nonlanguage visual-spatial functioning. Four unilaterally brain-damaged deaf signers, fluent in American Sign Language (ASL) before their strokes, served as subjects. Three had damage to the left hemisphere and one had damage to the right hemisphere. They were administered selected tests of nonlanguage visual-spatial processing. The pattern of performance of the four patients across this series of tests suggests that deaf signers show hemispheric specialization for nonlanguage visual-spatial processing that is similar to hearing speaking individuals. The patients with damage to the left hemisphere, in general, appropriately processed visual-spatial relationships, whereas, in contrast, the patient with damage to the right hemisphere showed consistent and severe visual-spatial impairment. The language behavior of these patients was much the opposite, however. Indeed, the most striking separation between linguistic and nonlangu...Continue Reading

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Citations

Jan 28, 2004·Neuropsychology·Zohar EviatarDeia Ganayim
Jul 25, 2012·Neurocase·Adam D FalchookKenneth M Heilman
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Feb 25, 2017·The Journal of Physiology·Mikko Juusola, Zhuoyi Song

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