PubMed · 585542
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D L Doyle. 1977. A case study in hypnotherapy.. https://pubmed.ncbi.nlm.nih.gov/585542/
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The perception of visual motion can be selectively and reversibly compromised by transcranial magnetic stimulation (TMS) of a small region of cortex, roughly 1 cm in diameter and corresponding in position to human area V5. The reversible inactivation of a small and specialized visual area which receives its predominant input from area V1 and sends a powerful return (re-entrant) input back to it allowed us to study for the first time the backward influence of area V5 on area V1. In contrast to the complete and temporary visual motion blindness which occurs during stimulation of V5, a less-prominent interference with the perception of visual motion occurs at 70-80 ms after the onset of the visual stimulus when TMS is applied to V1. Because V5 is critical for the perception of coherent motion, and because an intact re-entry of signals from V5 to V1 is essential for the conscious perception of visual motion, the results obtained with stimulation of V1 must be caused by a disruption of the re-entrant signals from V5 to V1.
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