Striate cortex extracts higher-order spatial correlations from visual textures Academic Article uri icon


MeSH Major

  • Pattern Recognition, Visual
  • Visual Cortex
  • Visual Perception


  • Spatial correlations define the statistical structure of any visual image. Two-point correlations inform the visual system about the spatial frequency content of an image. Higher-order correlations can capture salient features such as object contours. We studied "isodipole" texture discrimination in V1 to determine if higher-order spatial correlations can be extracted by early stages of cortical processing. We made epicortical, local field potential, and single-cell recordings of responses elicited by isodipole texture interchange in anesthetized monkeys. Our studies demonstrate that single neurons in V1 can signal the presence of higher-order spatial correlations in visual textures. This places a computational mechanism, which may be essential for form vision at the earliest stage of cortical processing.

publication date

  • August 30, 1994



  • Academic Article



  • eng

PubMed Central ID

  • PMC44630

PubMed ID

  • 8078907

Additional Document Info

start page

  • 8482

end page

  • 6


  • 91


  • 18