Melanopsin - Hutchinson encyclopedia article about Melanopsin Printer Friendly
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melatonin
(redirected from Melanopsin)

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melatonin

Hormone secreted by the pineal body that influences the body's circadian rhythms (metabolic activities centred approximately on a 24-hour cycle). Melatonin secretion is inhibited by bright light and the variations in secretion have been linked to seasonal affective disorder (SAD).
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Focusing their efforts on the melanopsin light sensor, which is responsible for sensing day and night but barely involved - in mammals, at least - in seeing images, Yau's team looked for melanopsin-containing cells in other vertebrates, and found some in the retinal horizontal cells in goldfish and catfish.
Scientists find cell in fish that can sense light and contribute to ... by Asian News International
More specifically, melanopsin is found in a subtype of intrinsically photoreceptive retinal ganglion cells (ipRGCs) (Berson et al.
Meeting report: the role of environmental lighting and circadian ... by Stevens, Richard G.; Blask, David E.; Brainard, George C.; Hansen, Johnni; Lockley, Steven W.; Prove / Environmental Health Perspectives
2006) reported the discovery of a melanopsin in retinal ganglion cells of chickens that functions in the circadian rhythm and pupillary light reflex.
Evolution: do the eyes have it? by Reinbold, Stephen L. / Forum on Public Policy: A Journal of the Oxford Round Table
 
 
 
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