September 2005
Volume 5, Issue 8
Free
Vision Sciences Society Annual Meeting Abstract  |   September 2005
Blind patients “see” their moving hand in darkness (synesthesia)
Author Affiliations
  • Shai Azoulai
    Center for Brain and Cognition, University of California San Diego
  • V.S. Ramachandran
    Center for Brain and Cognition, University of California San Diego
Journal of Vision September 2005, Vol.5, 756. doi:10.1167/5.8.756
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      Shai Azoulai, V.S. Ramachandran; Blind patients “see” their moving hand in darkness (synesthesia). Journal of Vision 2005;5(8):756. doi: 10.1167/5.8.756.

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      © 2016 Association for Research in Vision and Ophthalmology.

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Abstract

A patient who is blind because of damage to the visual pathways was asked to move his hand in front of his eyes in complete darkness. Amazingly he not only felt, but literally saw his hand moving; the converse of experienced movement of phantom limbs induced by visual feedback in mirrors. Normals don't see this because the top-down signals to the visual centers from polymodal cells in parietal and frontal lobes is vetoed by bottom-up nulling signals from the intact visual pathway.

Azoulai, S. Ramachandran, V. (2005). Blind patients “see” their moving hand in darkness (synesthesia) [Abstract]. Journal of Vision, 5(8):756, 756a, http://journalofvision.org/5/8/756/, doi:10.1167/5.8.756. [CrossRef]
Footnotes
 Geoffry Boynton & Vivian Ciaramitaro
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