Spectral Sensitivity of the Planarian Ocellus |
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| Authors: | H. Mack Brown Hiroshi Ito Thomas E. Ogden |
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| Affiliation: | From the Departments of Neurology and Physiology, University of Utah College of Medicine, Salt Lake City, Utah 84112. |
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| Abstract: | The ocellar potential (OP) of planaria was recorded using microelectrode techniques. The action spectrum and spectral sensitivity of the OP are described. Maximum OP sensitivity was found with 508 nm light. A moderate increase in sensitivity to blue light was observed. This is typical of many invertebrate photoreceptors and was shown, by selective chromatic adaptation, not to indicate the presence of a second pigment. |
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