Accession Number:

AD0621426

Title:

RECEPTIVE FIELDS OF OPTIC NERVE FIBERS IN THE SPIDER MONKEY,

Descriptive Note:

Corporate Author:

HARVARD MEDICAL SCHOOL BOSTON MASS NEUROPHYSIOLOGY LAB

Personal Author(s):

Report Date:

1960-07-12

Pagination or Media Count:

9.0

Abstract:

Receptive fields of retinal ganglion cells were studied in the light-adapted spider monkey. All fields mapped with white light had a concentric arrangement sililar to that of the cat retinal ganglion cells, with a sharply demarcated on centre surrounded by an antagonistic off periphery, or the reverse. The smallest receptive field centres were found near the fovea, and the size of centres tended to increase with increasing distance from the fovea. The smallest centre had a diameter of 4 minutes of arc corresponding to about 20 microns on the retina and was located 4 degrees from the fovea the largest centre had a diameter of 2 degrees. Three ganglion cells out of about 100 responded in a specific way to coloured stimuli. In these cells light of short wave-length produced an on response and light of long wave-length evoked inhibition followed by an off response. Transition between the two types of response occurred at about 500 millimicrons, light of this wave-length evoked only feebel off responses. Very weak responses were obtained to white light, presumably owing to the antagonism between light of short and long wavelengths. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE