Mechanisms
of motion perception
R. Sekuler & E. Levinson |
1'Vlotion
sensitive mechanisms in human vision resemble other sensory mechanisms
: they are independent of each other at threshold and inhibit one
another above threshold. Several experiments show that 1) gratings
moving in opposite directions are detected independently and 2) at
suprathreshold levels there is inhibition between mechanisms sensitive
to opposite directions of motion. A model is proposed which accounts
for the co-existence of independence and inhibition. The model explains
many perceptual phenomena including motion aftereffects and direction
reversals in ambiguous moving stimuli.
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