Merging of Modalities in the Optic Tectum: Infrared and Visual Integration in Rattlesnakes

DOI Web Site 被引用文献3件
  • Peter H. Hartline
    Department of Physiology and Biophysics, and Neural and Behavioral Biology Program, University of Illinois, Urbana 61801
  • Leonard Kass
    Department of Physiology and Biophysics, and Neural and Behavioral Biology Program, University of Illinois, Urbana 61801
  • Michael S. Loop
    Department of Physiology and Biophysics, and Neural and Behavioral Biology Program, University of Illinois, Urbana 61801

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<jats:p>The optic tectum of pit vipers (Crotalinae) contains a layer of infrared-sensitive neurons subjacent to the visual layer; these indirectly receive input from the facial pit organs. They respond transiently to the appearance or motion of warm objects within their 25° to 70° excitatory receptive fields (some have inhibitory regions) and presumably allow the snake to orient or strike toward prey. The infrared and visual spatiotopic tectal maps have similar but not identical axes; the infrared magnification is greater than that for vision. Bimodal neurons have receptive fields for each modality that reflect the disparity of the two maps. This finding suggests that (i) during development the infrared and visual fibers spread out independently to fill available tectal sites and (ii) bimodal neurons form local connections without regard to establishing spatial correspondence between the two modalities.</jats:p>

収録刊行物

  • Science

    Science 199 (4334), 1225-1229, 1978-03-17

    American Association for the Advancement of Science (AAAS)

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