Magnification factor and receptive field size in foveal striate cortex of the monkey

B. M. Dow, A. Z. Snyder, R. G. Vautin, R. Bauer

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362 Scopus citations


Receptive field size and magnification have been studied in striate cortex of awake, behaving rhesus monkeys at visual eccentricities in the range of 5-160 min. The major findings that emerge are (1) magnification in the foveola achieves values in the range of 30 mm/deg, (2) mean field size is not proportional to inverse magnification in contrast with previous reports, and (3) the product, magnification X aggregate field size, is greater in central vision than in peripheral vision. Thus, a point of light projected onto foveal retina is "seen" by larger numbers of striate cortical cells than a point of light projected onto peripheral retina. Implications of these findings for visual localization and two-point discrimination are discussed.

Original languageEnglish
Pages (from-to)213-228
Number of pages16
JournalExperimental Brain Research
Issue number2
StatePublished - Oct 1981


  • Fovea
  • Magnification
  • Monkey
  • Receptive field
  • Striate cortex
  • Visual acuity


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