منابع مشابه
Photoreception in sparrows: response to photoperiodic stimuli.
a typically normal learning curve, represents the function of both cerebral hemispheres during learning. The learning curve in Fig. 3 must then represent the function of only one hemisphere during learning. They are respective "bilateral hemispheric" and "unilateral hemispheric" products. Participation of only one hemisphere during learning would necessarily limit by one-half the available amou...
متن کاملNonvisual photoreception in the chick iris.
The embryonic chicken iris constricts to light ex vivo, but with characteristics atypical of visual phototransduction. The chick iris was most sensitive to short-wavelength light, demonstrating an action spectrum consistent with cryptochrome rather than with opsin pigments. Pupillary responses did not attenuate after saturating light exposure, but showed paradoxical potentiation. Iris photosens...
متن کاملMammalian Inner Retinal Photoreception
It is now a decade since the first published reports that a small proportion of mammalian retinal ganglion cells are directly photoresponsive. These cells have been termed intrinsically photosensitive retinal ganglion cells (ipRGCs) and comprise a small proportion of the total population of retinal ganglion cells. The demonstration that these ganglion cells respond to light even when isolated f...
متن کاملNeural Photoreception in a Lamellibranch Mollusc
The pallial nerves of Spisula solidissima each contain a single afferent nerve fiber which responds directly to illumination of the nerve, and apparently mediates the "shadow" response of siphon retraction. These units show constant-frequency spontaneous activity in the dark; illumination abruptly inhibits this discharge, and cessation of the light stimulus then evokes a prolonged burst of impu...
متن کاملNon-image-forming ocular photoreception in vertebrates.
It has been accepted for a hundred years or more that rods and cones are the only photoreceptive cells in the retina. The light signals generated in rods and cones, after processing by downstream retinal neurons (bipolar, horizontal, amacrine and ganglion cells), are transmitted to the brain via the axons of the ganglion cells for further analysis. In the past few years, however, convincing evi...
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ژورنال
عنوان ژورنال: Science
سال: 1971
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.172.3980.293