Visual cortex activation in blind humans during sound discrimination.


We used a whole-scalp magnetometer with 122 planar gradiometers to study the activity of the visual cortex of five blind humans deprived of visual input since early infancy. Magnetic responses were recorded to pitch changes in a sound sequence when the subjects were either counting these changes or ignoring the stimuli. In two of the blind subjects, magnetic resonance images were also obtained, showing normal visual cortex macroanatomy. In these subjects, the magnetic responses to counted pitch changes were located at visual and temporal cortices whereas ignored pitch changes activated the temporal cortices almost exclusively. Also in two of the other three blind, the visual-cortex activation was detectable in the auditory counting task. Our results suggest that the visual cortex of blind humans can participate in auditory discrimination.

Extracted Key Phrases

2 Figures and Tables

Citations per Year

436 Citations

Semantic Scholar estimates that this publication has 436 citations based on the available data.

See our FAQ for additional information.

Cite this paper

@article{Kujala1995VisualCA, title={Visual cortex activation in blind humans during sound discrimination.}, author={Teija Kujala and Minna Huotilainen and Janne Sinkkonen and Antti Ahonen and K. Alho and Matti S. H{\"a}m{\"a}l{\"a}inen and Risto J. Ilmoniemi and M J Kajola and Jarno Knuutila and Juha Lavikainen}, journal={Neuroscience letters}, year={1995}, volume={183 1-2}, pages={143-6} }