selective sparing of colour vision

selective sparing of colour vision
   The expression selective sparing of colour vision refers to a rare syndrome in which the affected individual is blind, except for the conscious perception of colour. The condition was first described in 1933 by the American neurologist Israel Spanier Wechsler (1886-1962) in relation to an individual who had suffered from carbon monoxide poisoning. After having been unconscious for 2 h due to a house fire, the man turned out to be virtually blind. However, his colour vision was so well preserved that he was able to distinguish colours and even shades of colours. As Wechsler concludes, "The case herein presented warrants the statement that color vision and visual acuity can be dissociated in such a way that the former is preserved while the latter is impaired." Conceptually as well as phenomeno-logically, selective sparing of colour vision constitutes the counterpart of * achromatopsia.
   Wechsler, I.S. (1933). Partial cortical blindness with preservation of color vision. Report of a case following asphyxia (carbon monoxide poisoning?). Archives of Ophthalmology,9, 957-965.
   Zeki, S., Aglioti, S., McKeefry, D., Berlucchi, G. (1999). The neurological basis of conscious color perception in a blind patient. Proceedings ofthe National Academy ofSciences ofthe United States of America, 96, 14124-14129.

Dictionary of Hallucinations. . 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • achromatopsia —    Also referred to as monochromatism, monochromatopsia, and total colour blindness. The term achromatopsia comes from the Greek words achromatos (colourless) and opsis (seeing). It refers to the inability or strongly diminished ability to… …   Dictionary of Hallucinations

  • drug — drug1 /drug/, n., v., drugged, drugging. n. 1. Pharm. a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well being. 2. (in federal law) a. any substance… …   Universalium

  • Drug — /droog/, n. Zoroastrianism. the cosmic principle of disorder and falsehood. Cf. Asha. [ < Avestan drauga] * * * I Any chemical agent that affects the function of living things. Some, including antibiotics, stimulants, tranquilizers,… …   Universalium

  • international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …   Universalium

  • death — /deth/, n. 1. the act of dying; the end of life; the total and permanent cessation of all the vital functions of an organism. Cf. brain death. 2. an instance of this: a death in the family; letters published after his death. 3. the state of being …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”