Perception of polarization plane, colour and movement in two dimensions by the crab, Carcinus

Abstract

The spectral sensitivity of movement perception in Carcinus has a peak near 508 mμ, irrespective of the direction of the movement or of the plane of polarization of the stimulating light, although the primary sensory cells are 10 times as sensitive to light in one plane of polarization as in the plane at right angles. This balance in the input to the movement perception system breaks down with a stimulating light at <439 and at >650 mμ. Only one set of connexions between the primary receptors in the movement perception system agrees with all the results of manipulating the various attributes of the visual input, and this model has unique properties which allow the subsequent discrimination of each attribute of the stimulus independent of the other attributes. Show more