Abstract
Abstract This article reviews disorders of tactile recognition that include (I) low-level-discrlmination impairments in touch such as basic somatosensory deficits and difficulties in the discrimination of tactile features of objects, and (ii) higher-level tactile recognition deficits such as tactile agnosia and tactile aphasia. It is suggested that iow-level discrimination impairments result from damage to the contralateral postcentral gyrus, and from damage to structures such as the posterior insuia and the parietal operculum. Furthermore, the processing of specific tactile features (e.g. shape, size, versus texture) appears to occur in functionally and neuroanatomlcally separate regions. High-level impairments such as tactile agnosia and aphasia, on the other hand, appear to result from damage to structures in the inferior parietal lobe. The deficit in these disorders appears to reflect loss of access to integrated object descriptions, or loss of access to meaning representations.
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