Color Compensation in Anomalous Trichromats Assessed with fMRI.

ABSTRACT: Anomalous trichromacy is a common form of congenital color deficiency resulting from a genetic alteration in the photopigments of the eye's light receptors. The changes reduce sensitivity to reddish and greenish hues, yet previous work suggests that these observers may experience the world to be more colorful than their altered receptor sensitivities would predict, potentially indicating an amplification of post-receptoral signals. However, past evidence suggesting such a gain adjustment rests on subjective measures of color appearance or salience. We directly tested for neural amplification by using fMRI to measure cortical responses in color-anomalous and normal control observers. Color contrast response functions were measured in two experiments with different tasks to control for atten

SUBMITTER: Tregillus KEM 

PROVIDER: S-EPMC7946702 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature