WOBIB: 52 - Zeki, et al. (2003) The processing of kinet ...
 
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Semir Zeki; R. J. Perry; A. Bartels. The processing of kinetic contours in the brain. Cerebral Cortex 13(2):189-202, 2003. PMID: 12507950. WOBIB: 52.

This work investigates whether the brain assigns special cortical areas for the processing of kinetic contours. In human imaging experiments, we compared the brain activity produced in the so-called 'kinetic occipital' area ('KO') when humans perceive shapes generated from kinetic boundaries or from equiluminant colors. 'KO' was activated whenever subjects perceived shapes, no matter how they were derived; it is therefore not specialized for the processing of kinetic contours. The application of independent component analysis (ICA) to imaging data obtained when subjects viewed 22 min of an action movie showed that the time course of activity in 'KO' correlates better with activity in area V3 than with activity in two adjacent areas, V5 and LO. We thus consider 'KO' to be part of the V3 family of areas, and use the terminology of Smith et al. (J Neurosci 18:3816-3830, 1998), to refer to it as area V3B. Recordings from orientation-selective cells in the macaque V3 complex show that the great majority have the same orientational specificity when tested with oriented lines generated from kinetic stimuli or from luminance differences. We conclude that there is no present evidence for a visual area specialized for the processing of kinetic contours in the primate visual brain.

Asymmetry: 0.45117 (left: -1, right: +1)

VRML2 file (73 Kb)

1 Color shape and motion shape (group data). Passive viewing of color shape from static isoluminant red and green oriented bars and stationary shapes by kinetic contours from motion of fields of dots versus no shape color viewing and no shape coherent visual motion. WOEXP: 172.
2 Color shape and motion shape (individual subject). Passive viewing of color shape from static isoluminant red and green oriented bars and stationary shapes by kinetic contours from motion of fields of dots versus no shape color viewing and no shape coherent visual motion. WOEXP: 173.
3 Dynamic complex visual scene. Passive viewing and hearing of a movie (James Bond, Tomorrow never dies) with changes from color to black and white every 30 seconds and interrupted every 2.5 or 3 minutes with a blank period. Areas with high loadings in an independent component analysis.. WOEXP: 174.


corner cube of WOBIB_52

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