Retinal inputs to the geniculate relay cells in the eastern chipmunk (Tamias sibiricus asiaticus): a comparison between color and non-color sensitive cells.
Single unit recordings were made from the relay cells of the lateral geniculate nucleus in the eastern chipmunk. Of 362 relay cells, 47 cells (13%) were classified as color sensitive and the rest as non-color sensitive cells. Non-color sensitive cells were further classified into 5 subclasses: off-phasic, on-phasic, on-off-phasic, on-tonic and uncommon types. Within the color sensitive cells there were 3 subclasses; blue excited and green inhibited (+B-G), blue inhibited and green excited (-B+G), and blue excited (+B) cells. Retinal afferents to color sensitive relay cells had the following characteristics: ganglion cells of their origin were distributed in the central high density areas of the retina and axonal conduction velocities were in the intermediate range, though they were somewhat slow in +B cells.
D000818:Animals; D003118:Color Perception / Q000502:physiology*; D005260:Female; D005829:Geniculate Bodies / Q000166:cytology / Q000502:physiology*; D008297:Male; D009897:Optic Chiasm / Q000502:physiology; D011930:Reaction Time; D012160:Retina / Q000502:physiology*; D012589:Sciuridae / Q000502:physiology*; D014794:Visual Fields; D014795:Visual Pathways / Q000502:physiology*