Ophthalmology

Blind vision : the neuroscience of visual impairment by Zaira Cattaneo

By Zaira Cattaneo

Can a blind individual see? The very inspiration turns out paradoxical. the following the authors research the results of blindness and different kinds of visible deficit at the improvement and functioning of the human cognitive system.

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Extra resources for Blind vision : the neuroscience of visual impairment

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2007) found that blind participants recalled more words than the sighted (indicating better item-memory), and were most notably superior in recalling longer word sequences according to their original order. The superior serial memory of the blind and their higher serial-learning abilities likely depend on blind individuals’ experience: in fact, the blind typically adopt serial strategies in order to compensate for the lack of immediate visual information. The results by Raz et al. (Raz, Striem et al.

At the cortical level, densely innervated body parts are represented by a larger numbers of neurons occupying a disproportionately large part of the somatosensory system’s body representation: in fact, the finger tips and lips provide the cortex with the most detailed information about a tactile stimulus. Proprioceptive afferents are fast-conducting afferents that provide information about static limb and joint position or about the dynamic movement of the limb (kinhestesia) and thus are critical for balance, posture and limb movements.

Legge, Madison et al. 2008) demonstrated that enhanced tactile acuity in blind individuals is retained into old age (but only when measured with active touch: see Stevens, Foulke, and Patterson 1996; Goldreich and Kanics 2003; Goldreich and Kanics 2006), whereas tactile acuity has been found to decline with age in sighted individuals. ” There are six possible dot positions in each Braille cell; the larger black circles represent the dots in the character, and the smaller black circles represent the unused dot positions.

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