The current experiments measured orientation discrimination thresholds in younger (mean
age≈ 23 years) and older (mean age≈ 66 years) subjects. In Experiment 1, the contrast …

Accurately processing orientation information is a fundamental component of visual
performance. Single-unit recordings have shown that the orientation tuning of individual …

Leventhal et al.(Science, 2003, 300 (5620), 812–815) reported that orientation selectivity of
V1 neurons was significantly reduced in older macaque monkeys, which suggests that …

Visual function declines with age. Using extracellular single-unit in vivo recordings, we
compared the function of primary visual cortical (area 17) cells in young and old paralyzed …

Human visual function declines with age. Much of this decline is probably mediated by
changes in the central visual pathways. We compared the stimulus selectivity of cells in …

Random dot cinematograms were used to probe motion perception in human observers
ranging from 23 to 81years of age. Stimuli were either broadband directional Noise, which …

Visual impairments that are not related to optical changes are not uncommon during aging,
and a number of psychophysical investigations have documented deficits in motion …

Visual function declines with age. Much of the decline may result from functional
degradation in central visual areas. To investigate the physiological mechanisms underlying …

Human visual function declines with age. Much of this decline is mediated by changes in the
central visual pathways. In this study we compared the spatial and temporal sensitivities of …

Electrophysiological studies indicate that a decline of GABAergic inhibition in the visual
cortex may underlie age-related degradation of visual function [AG Leventhal, Y. Wang, M …