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- Title
The effect of moving textures on the responses of cells in the cat's dorsal lateral geniculate nucleus.
- Authors
Girardin, Cyrille C.; Kiper, Daniel C.; Martin, Kevan A. C.
- Abstract
Abstract Neurons in the dorsal lateral geniculate nucleus (dLGN) of the anaesthetized cat were activated with test stimuli (flashing spots, counterphased gratings and moving bars) in the presence of a moving background texture. Moving texture alone produced mild excitation, as a result of stimulation of the receptive field centre. Fast moving coarse textures were more effective than fine slow moving textures. The predominant effect of texture motion, however, was to reduce the response to all test stimuli displayed in the receptive field centre. The effects were similar for X- and Y-like cells. In the case of flashed spots, the sustained response was more strongly suppressed than the transient response. The direction of motion of the texture and differences in the relative motion of bar and texture had no influence on the degree of suppression. These observations are similar to effects seen on cat retinal ganglion cells, and are probably a form of gain control. Such suppressive effects are transmitted to the cortex and are likely to be evoked by large gratings, textures and by natural stimuli, all of which activate extensive regions of the receptive field surround.
- Subjects
SENSORY perception; SENSORY ganglia; PHYSIOLOGY
- Publication
European Journal of Neuroscience, 2002, Vol 16, Issue 11, p2149
- ISSN
0953-816X
- Publication type
Article
- DOI
10.1046/j.1460-9568.2002.02278.x