Kechen Zhang: Research Highlights
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Rotation of a 3-D object around different axes
Axis of rotation determines how the view of an object changes
instantaneously, along with various visual cues, such as shading,
shadow, mirror reflection, glare, and occlusion. Rigid geometry
predicts that the response of a motion-sensitive neuron, to a
first approximation, should have a preferred rotation axis in
three-dimensional space with cosine tuning function and linear
angular speed modulation, regardless of the exact cues used and
the exact computational mechanisms involved.
How does the brain represent arbitrary motion of a 3-D object?
Existing data are inadequate for us to draw a conclusion. In a
recent paper (J. Neuroscience, in press, PostScript manuscript
available from my
publication page), we have made a number of specific
predictions. Please contact us if you are interested in doing
experiments to resolve this issue.
Kechen Zhang, 1999