Anatomical Evidence of Multimodal Integration in Primate Striate Cortex

We show using retrograde tracers that peripheral area 17 subserving the visual field at an eccentricity of 10–20° receives projections from the core and parabelt areas of the auditory cortex as well as from the polysensory area of the temporal lobe

Arnaud Falchier

2018

Scholarcy highlights

  • The primary visual cortex is not thought to receive input from nonvisual extrastriate cortical areas
  • The known anatomy of the visual cortex predicts that integration of visual and nonvisual stimuli will occur at late stages of cortical processing
  • Three groups of injections of fast blue and diamidino yellow were made in area 17 subserving the central, paracentral, and the peripheral visual field
  • There have been only a limited number of studies investigating how the connectivity of a cortical area is influenced by representation of the visual field, and these have mostly concentrated on the interconnections between extrastriate visual areas
  • Few studies have addressed the differences in the connectivity of area 17 subserving the central and peripheral visual field
  • One striking difference between central and peripheral area 17 is evidence of a direct connection of peripheral 17 with the prostriata. These findings are complementary to ours, suggesting that peripheral area 17 is directly influenced by nonvisual inputs
  • The auditory system is organized in parallel streams and the caudal auditory parabelt area, which contains approximately twothirds of the labeled neurons in the auditory cortices in the present study, is part of the dorsal auditory pathway specialized in spatial information processing, including sound source localization

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