Do Y geniculate neurons have greater contrast sensitivity than X geniculate neurons at all visual field locations?
Contrast sensitivities for gratings of different spatial frequencies drifting at 5.2 Hz were measured for X- and Y-type neurons of the cat's dorsal lateral geniculate nucleus. It was found that, for cells with neighboring receptive fields, the peak contrast sensitivities of Y-type cells were always greater than those of X-type cells. This greater contrast sensitivity of Y geniculate cells was found not to depend on the area of visual field in which the cells' receptive fields were located.
Troy
J B
JB
Department of Neurobiology, Northwestern University, Evanston, IL 60201.
D000818:Animals; D001931:Brain Mapping; D002415:Cats; D005556:Form Perception / Q000502:physiology*; D005829:Geniculate Bodies / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D014794:Visual Fields