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Finney, E. M., Clementz, B. A., Hickok, G., & Dobkins, K. R. (2003). Visual stimuli activate auditory cortex in deaf subjects: Evidence from MEG. NeuroReport, 14(2), 1425–1427.
Added by: sirfragalot (06/15/2014 09:47:02 AM)
|Resource type: Journal Article
BibTeX citation key: Finney2003
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Keywords: Cross-modality, Neuralplasticity, Neuroscience, perception
Creators: Clementz, Dobkins, Finney, Hickok
Publisher: Lippincott Williams & Wilkins
Studies using fMRI have demonstrated that visual stimuli activate auditory cortex in deaf subjects.Given the low temporal resolution of fMRI, it is uncertain whether this activation is associated with initial stimulus processing.Here, we used MEGin deaf and hearing subjects to evaluatewhether auditory cortex, devoid of its normal input, comes to serve the visualmodality early in the course of stimulus processing. In line with previous ¢ndings, visual activity was observed in the auditory cortex of deaf, but not hearing, subjects. This activity occurred within 100-400ms of stimulus presentation and was primarily over the right hemisphere. These results add to the mounting evidence that removal of one sensory modality in humans leads to neural reorganization of the remaining modalities.
It appears that the auditory cortex in these cases is used for the perception of visual movement as is the visual cortex in blind people. Neuro-plasticity was most noticeable in the right hemisphere which, in hearing persons, is predominantly associated with the processing of auditory motion.
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