A Hypothesis on the Efferent System from the Visual Cortex

  • Giorgio M. Innocenti
Part of the NATO Advanced Study Institutes Series book series (NSSA, volume 27)


There is evidence suggesting that the radial and tangential distributions of neurons within the sensory cortices may be main factors determining their functional properties. Cortical neurons projecting to different structures have, in general, different radial location and can have different tangential location; thus probably the cortex sends to different structures messages of different format. In the case of neurons efferent to the contralateral cortex, via the corpus callosum, the restricted radial and tangential distributions typical of the adult are acquired postnatally in somatosensory and visual areas of the cat, through a process of tangential and radial reductions from a widespread neonatal distribution. In the visual cortex, this maturational process can be affected by strabismus or by monocular deprivation. These manipulations of the visual experience result in adults having a more widespread distribution of callosal neurons in area 17 than normally observed.


Corpus Callosum Visual Cortex Receptive Field Auditory Cortex Tangential Location 


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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • Giorgio M. Innocenti
    • 1
  1. 1.Institute of AnatomyUniversity of LausanneLausanneSwitzerland

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