blindsight

n. the capacity of some individuals with damage to the striate cortex (primary visual cortex or area V1) to detect and even localize visual stimuli presented to the blind portion of the visual field. Discrimination of movement, flicker, wavelength, and orientation may also be present. However, these visual capacities are not accompanied by conscious awareness. The causes of blindsight are the subject of some debate: Because the neural pathway from the lateral geniculate nucleus to the striate cortex is nonfunctional in blindsighted people, it is thought that these capacities are either based on the visual collicular pathway (see colliculus; superior colliculus) or represent residual vision using surviving striate cortex. See also deaf hearing; numbsense.

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Psychology term of the day

November 17th 2024

sexual tension

a condition of anxiety and restlessness associated with the sex drive and a normal desire for release of sexual energy. Sexual tension may be complicated by fear of inadequate performance, fear of an unwanted pregnancy, fear of discovery, or other concerns.