Visual recovery in cortical blindness is limited by high internal noise.

ABSTRACT: Damage to the primary visual cortex typically causes cortical blindness (CB) in the hemifield contralateral to the damaged hemisphere. Recent evidence indicates that visual training can partially reverse CB at trained locations. Whereas training induces near-complete recovery of coarse direction and orientation discriminations, deficits in fine motion processing remain. Here, we systematically disentangle components of the perceptual inefficiencies present in CB fields before and after coarse direction discrimination training. In seven human CB subjects, we measured threshold versus noise functions before and after coarse direction discrimination training in the blind field and at corresponding intact field locations. Threshold versus noise functions were analyzed within the framework of t

SUBMITTER: Cavanaugh MR 

PROVIDER: S-EPMC4585331 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature