Prominent effects and neural correlates of visual crowding in a neurodegenerative disease population.

ABSTRACT: Crowding is a breakdown in the ability to identify objects in clutter, and is a major constraint on object recognition. Crowding particularly impairs object perception in peripheral, amblyopic and possibly developing vision. Here we argue that crowding is also a critical factor limiting object perception in central vision of individuals with neurodegeneration of the occipital cortices. In the current study, individuals with posterior cortical atrophy (n=26), typical Alzheimer's disease (n=17) and healthy control subjects (n=14) completed centrally-presented tests of letter identification under six different flanking conditions (unflanked, and with letter, shape, number, same polarity and reverse polarity flankers) with two different target-flanker spacings (condensed, spaced). Patients wit

SUBMITTER: Yong KX 

PROVIDER: S-EPMC4240300 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature