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Mapping striate and extrastriate visual areas in human cerebral cortex

E A DeYoe1, G J Carman, P Bandettini

  • 1Department of Cellular Biology and Anatomy, and Biophysics Research Institute, Medical College of Wisconsin, Milwaukee 53226, USA.

Proceedings of the National Academy of Sciences of the United States of America
|March 19, 1996
PubMed
Summary

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Functional magnetic resonance imaging (fMRI) mapped human visual cortex areas, revealing organization similar to macaque monkeys. Differences may emerge in extrastriate cortex beyond visual areas V3A and V4.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Visual Neuroscience

Background:

  • The human visual cortex contains multiple areas with specific functions.
  • Understanding the topographical organization of these areas is crucial for cognitive neuroscience.
  • Comparing human and non-human primate visual cortex organization provides insights into evolutionary relationships.

Purpose of the Study:

  • To identify and map the visual field representation in human cerebral cortex using fMRI.
  • To identify additional visually responsive regions in the human brain.
  • To compare the topographical organization of human visual areas with those of macaque monkeys.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed to study visual cortex activity.

Related Experiment Videos

  • Cortical locations of neuronal responses to visual field stimulation were charted.
  • Three-dimensional cortical models and unfolded cortical surface maps were utilized.

    • Main Results:

    • Seven areas representing the visual field were identified in the human cerebral cortex.
    • Two additional visually responsive regions were discovered.
    • The identified visual areas showed topographical organization homologous to macaque monkey areas (V1-V4).
    • Similarities in visual cortex organization were observed between humans and macaque monkeys.

    Conclusions:

    • The topographical organization of human visual areas is largely consistent with that of macaque monkeys.
    • Potential divergence in cortical organization between humans and simians may occur in extrastriate cortex beyond areas V3A and V4.