Visual acuity correlates with cortical magnification factors in human V1
Year: 2002
Type: article
Abstract: We show that visual acuity in humans is limited by the amount of primary visual cortex (V1) devoted to a region of the visual field, called the linear cortical magnification factor (M). We used fMRI to measure M in V1, and two psychophysical tasks to measure acuity (Vernier and grating) in the same ten observers. Across observers, the decrease in M with increasing eccentricity predicts the corresponding decrease in acuity for both tasks. Furthermore, observers with lower grating acuity thresholds, measured with laser interferometry, had a significantly greater overall M. These results establish faithful estimates of cortical limits to visual acuity.
Source: Journal of Vision
DOI: 10.1167/2.10.11
Authors: G. M. Boynton, R. O. Duncan
Institution: Salk Institute for Biological Studies
Language: English
Subfield: Cognitive Neuroscience
Field: Neuroscience
Domain: Life Sciences
Open Access status: gold
Estimated APC paid: $1,850
OpenAlex ID: W1969071703