Receptive fields in human visual cortex mapped with surface electrodes

Cereb Cortex. 2007 Oct;17(10):2293-302. doi: 10.1093/cercor/bhl138. Epub 2006 Dec 16.


Most of our understanding of the functional organization of human visual cortex comes from lesion and functional imaging studies and by extrapolation from results obtained by neuroanatomical and neurophysiological studies in nonhuman primates. Although some single-unit and field potential recordings have been made in human visual cortex, none has provided quantitative characterization of spatial receptive fields (RFs) of individual sites. Here we use subdural electrodes implanted for clinical purposes to quantitatively measure response properties in different regions of human visual cortex. We find significant differences in RF size, response latency, and response magnitude for sites in early visual areas, versus sites in later stages of both the dorsal and ventral streams. In addition, we use this technique to estimate the cortical magnification factor in early human visual cortex. The spatial and temporal resolution of cortical surface recordings suggest that this technique is well suited to examine further issues in visual processing in humans.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Brain Mapping*
  • Electric Stimulation
  • Epilepsy / pathology
  • Epilepsy / physiopathology
  • Humans
  • Reaction Time
  • Reproducibility of Results
  • Video Recording
  • Visual Cortex / anatomy & histology*
  • Visual Cortex / physiology*
  • Visual Cortex / physiopathology
  • Visual Perception / physiology*