Zaira Cattaneo's Blind vision : the neuroscience of visual impairment PDF

By Zaira Cattaneo

ISBN-10: 0262295814

ISBN-13: 9780262295819

Can a blind individual see? The very concept turns out paradoxical. right here the authors study the consequences of blindness and different kinds of visible deficit at the improvement and functioning of the human cognitive system.

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Extra info for Blind vision : the neuroscience of visual impairment

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2004) reported enhanced ability in blind subjects to report correct syllables presented via headphones in a dichotic listening procedure. In non-forced attentional conditions, both blind and sighted individuals tended to report more correct syllables when coming from the right ear, reflecting the dominant role of the left temporal cortex in speech perception (Kimura 1967). However, blind individuals were better in modulating this effect through focusing attention in the forced-left-ear conditions.

Critically, mislocations errors mainly occurred at the right (reading) hand, affecting all fingers (reading fingers were less prone to mislocation but tended to attract most of the misperceived stimuli) and suggesting that mislocations were related to Braille reading rather than the loss of vision per se. As suggested by Sterr et al. (Sterr, Green, and Elbert 2003), it is likely that Braille reading leads to enlarged finger representations with greater overlap of the respective neural networks (see Braun, Schweizer et al.

In one of the few studies that have specifically addressed this issue, Dufour, Déspres and Candas (2005) measured the extent to which blind and sighted subjects relied on echo-cues processing in an auditory localization task in which subjects’ attention was either directed on echo-cues or on other features of the stimuli. Specifically, early blind, late blind and sighted participants had to judge the position of a wooden board on the basis of sounds that were reflected by the board; in a further condition, a task was used that was not directly focused on echo-cues, instead requiring that subjects localize a direct sound source.

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Blind vision : the neuroscience of visual impairment by Zaira Cattaneo


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