Accession Number:

ADA250055

Title:

Function of P and M Pathways in Primates.

Descriptive Note:

Annual rept.,

Corporate Author:

ROCHESTER UNIV NY

Personal Author(s):

Report Date:

1992-04-13

Pagination or Media Count:

3.0

Abstract:

Psychophysical threshold measures were used in combination with precisely located lesions of the sub-cortical visual pathway to examine segregation of function between P and M pathways. Scleral search coils monitored fixation locus in the tested monkeys, to insure that test stimuli were presented in visual field regions corresponding to the lesion location. Results of these studies indicated that the P pathway or color-opponent pathway is the major contributor to visual acuity, color vision, and luminance contrast sensitivity. On the other hand, the M pathway or broadband pathway appeared crucial for the visibility of low spatial frequencies broad contours, as well as sensitivity to rapidly drifting visual stimuli.

Subject Categories:

  • Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE