Learning to see: experience and attention in primary visual cortex

Citation
Re. Crist et al., Learning to see: experience and attention in primary visual cortex, NAT NEUROSC, 4(5), 2001, pp. 519-525
Citations number
36
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Neurosciences & Behavoir
Journal title
NATURE NEUROSCIENCE
ISSN journal
1097-6256 → ACNP
Volume
4
Issue
5
Year of publication
2001
Pages
519 - 525
Database
ISI
SICI code
1097-6256(200105)4:5<519:LTSEAA>2.0.ZU;2-Z
Abstract
The response properties of neurons in primary sensory cortices remain malle able throughout life. The existence of such plasticity, and the characteris tics of a form of implicit learning known as perceptual learning, suggest t hat changes in primary sensory cortex may mediate learning. We explored whe ther modification of the functional properties of primary visual cortex (V1 ) accompanies perceptual learning. Basic receptive field properties, such a s location, size and orientation selectivity, were unaffected by perceptual training, and visual topography (as measured by magnification factor) was indistinguishable between trained and untrained animals. On the other hand, the influence of contextual stimuli placed outside the receptive field sho wed a change consistent with the trained discrimination. Furthermore, this property showed task dependence, only being manifest when the animal was pe rforming the trained discrimination.