Perceptual Correlates of Changes in Cortical Representation of Fingers in Blind Multifinger Braille Readers
Sterr, A, Müller, MM, Elbert, T, Rockstroh, B, Pantev, C and Taub, E (1998) Perceptual Correlates of Changes in Cortical Representation of Fingers in Blind Multifinger Braille Readers The Journal of Neuroscience, 18. pp. 4417-4423.
The mature mammalian nervous system alters its functional organization in a use-dependent manner. Enhanced stimulation of a body part enlarges its cortical representational zones and may change its topographic order. Little is known about the perceptual and behavioral relevance of these plastic alterations in cortical organization. We used blind Braille readers who use several fingers on each hand and who do so for many hours each day as a model to investigate this issue. Magnetic source imaging indicated that the cortical somatosensory representation of the fingers was frequently topographically disordered in these subjects; in addition, they frequently misperceived which of these fingers was being touched by a light tactile stimulus. In contrast, neither the disordered representation nor mislocalizations were observed in sighted controls. Blind non-teacher Braille readers who used only one finger for reading were not significantly different from the sighted controls. Thus, use-dependent cortical reorganization can be associated with functionally relevant changes in the perceptual and behavioral capacities of the individual.
|Divisions :||Faculty of Arts and Human Sciences > Psychology|
|Date :||1 June 1998|
|Uncontrolled Keywords :||blindness, Braille reading, cortical reorganization, somatosensory, sensory deafferentation, tactile perception, cortex, organization, Semmes-Weinstein monofilaments|
|Additional Information :||Published in The Journal of Neuroscience, 18, 4417-4423. © 1998 Society for Neuroscience.|
|Depositing User :||Mr Adam Field|
|Date Deposited :||27 May 2010 14:43|
|Last Modified :||23 Sep 2013 18:34|
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