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Differential imaging of ocular dominance and orientation selectivity in monkey striate cortex

By Gary G. Blasdel


Differential images of ocular dominance, acquired by com-paring responses to the two eyes, reveal dark and light bands where cortical ceils are dominated by the right and left eyes. These include most (but not all) histochemically stained cy-tochrome oxidase blobs in their centers. Differential images of orientation, acquired by comparing responses to orthog-onal orientations, reveal dark and light bands that are rem-iniscent of the “orientation columns ” reported earlier, on the basis of P-deoxyglucose (2DG) autoradiograms (Hubel et al., 1978). However, they are shorter and more fragmented be-cause they do not include regions lacking selectivity for orientation. Even though these “bands ” derive from orien-tation-selective areas, comparisons with differential images of other orientations reveal that regions along their centers prefer different orientations. Hence, the orientation prefer

Year: 1992
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