Monkey and humans exhibit similar motion-processing mechanisms |
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Authors: | William Curran Catherine Lynn |
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Institution: | School of Psychology, Queen''s University Belfast, Belfast BT7 1NN, UK |
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Abstract: | Single cell recording studies have resulted in a detailed understanding of motion-sensitive neurons in non-human primate visual cortex. However, it is not known to what extent response properties of motion-sensitive neurons in the non-human primate brain mirror response characteristics of motion-sensitive neurons in the human brain. Using a motion adaptation paradigm, the direction aftereffect, we show that changes in the activity of human motion-sensitive neurons to moving dot patterns that differ in dot density bear a strong resemblance to data from macaque monkey. We also show a division-like inhibition between neural populations tuned to opposite directions, which also mirrors neural-inhibitory behaviour in macaque. These findings strongly suggest that motion-sensitive neurons in human and non-human primates share common response and inhibitory characteristics. |
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Keywords: | motion processing motion adaptation direction aftereffect motion-sensitive neurons |
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