Unequal representation of cardinal and oblique contours in ferret visual cortex
AUTOR(ES)
Coppola, David M.
FONTE
The National Academy of Sciences
RESUMO
We have measured the amount of cortical space activated by differently oriented gratings in 25 adult ferrets by optical imaging of intrinsic signal. On average, 7% more area of the exposed visual cortex was preferentially activated by vertical and horizontal contours than by contours at oblique angles. This anisotropy may reflect the real-world prevalence of contours in the cardinal axes and could explain the greater sensitivity of many animals to vertical and horizontal stimuli.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=19437Documentos Relacionados
- Representation of spatial frequency and orientation in the visual cortex
- Representation of the visual field in the occipital striate cortex.
- Updating of the visual representation in monkey striate and extrastriate cortex during saccades
- The representation of the ipsilateral visual field in human cerebral cortex
- Illusory contours activate specific regions in human visual cortex: evidence from functional magnetic resonance imaging.
