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The Journal of Neuroscience, December 1994, 14(12): 7367-7360 Transparent Motion Perception as Detection of Unbalanced Motion
 

Summary: The Journal of Neuroscience, December 1994, 14(12): 7367-7360
Transparent Motion Perception as Detection of Unbalanced Motion
Signals. II. Physiology
Ning Qian" and Richard A. Andersen
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
We investigated how the primate visual system solves the
difficult problem of representing multiple motion vectors in
the same part of the visual space-the problem of motion
transparency. In the preceding companion article we re-
ported that displays with locally well-balanced motion sig-
nals in opposite directions are perceptually nontransparent
(i.e., one does not see two coherent moving surfaces) and
that transparent displays always contain locally unbalanced
motion signals. This is exemplified by our paired and un-
paired dot patterns. Although both types of stimuli contain
two sets of dots moving in opposite directions, the former
is locally well balanced and appears like flicker while the
latter gives a perception of two transparent surfaces. In this
article we report our physiological recordings from areas Vl
and MT of behaving monkeys, comparing single-cell re-

  

Source: Andersen, Richard - Division of Biology, California Institute of Technology

 

Collections: Biology and Medicine