Results 31 to 40 of about 11,542 (237)
Light adaptation characteristics of melanopsin
Vision Research, 2021 Following photopigment bleaching, the rhodopsin and cone-opsins show a characteristic exponential regeneration in the dark with a photocycle dependent on the retinal pigment epithelium. Melanopsin pigment regeneration in animal models requires different pathways to rods and cones.
Pant, Mukund +3 more
openaire +3 more sources
Melanopic stimulation does not alter psychophysical threshold sensitivity for luminance flicker
Scientific Reports, 2021 In addition to the rod and cone photoreceptors the retina contains intrinsically photosensitive retinal ganglion cells (ipRGCs). These cells express the photopigment melanopsin and are known to be involved in reflexive visual functions such as pupil ...
Joris Vincent +3 more
doaj +1 more source
A missense variant (P10L) of the melanopsin (OPN4) gene in seasonal affective disorder [PDF]
, 2009 Background: Melanopsin, a non-visual photopigment, may play a role in aberrant responses to low winter light levels in Seasonal Affective Disorder (SAD).
Duncan, WC +6 more
core +1 more source
PLoS ONE, 2020 Melanopsin is a visual pigment expressed in a small subset of ganglion cells in the mammalian retina known as intrinsically photosensitive retinal ganglion cells (ipRGCs) and is implicated in regulating non-image forming functions such as circadian ...
Juan C Valdez-Lopez +4 more
doaj +1 more source
Melanopsin contributions to irradiance coding in the thalamo-cortical visual system. [PDF]
PLoS Biology, 2010 Photoreception in the mammalian retina is not restricted to rods and cones but extends to a subset of retinal ganglion cells expressing the photopigment melanopsin (mRGCs).
Timothy M Brown +9 more
doaj +1 more source
Vision: Melanopsin as a Raumgeber [PDF]
Current Biology, 2017 Two new studies show that neural systems receiving inputs from the melanopsin-containing retinal ganglion cells encode spatial information and therefore see the world in more detail than previously thought.
Spitschan, M, Aguirre, G
openaire +3 more sources
Melanopsin expression in the retinas of owls with different daily activity patterns
Journal of Photochemistry and Photobiology, 2022 Melanopsin is a photopigment found in a subset of retinal ganglion cells that is responsible for generating a series of responses to light in organisms, such as circadian rhythm regulation, pupillary light reflex, and body temperature control.
Maria Júlia Vilani Naman +6 more
doaj +1 more source
Melanopsin: an exciting photopigment
Trends in Neurosciences, 2008 The discovery that mice lacking rods and cones are capable of regulating their circadian rhythms by light provided the conceptual framework for the discovery of an entirely new photoreceptor system within the mammalian eye. We now know that a small subset of retinal ganglion cells are directly photosensitive and utilize an opsin/vitamin A-based ...
Hankins, M, Peirson, S, Foster, R
openaire +2 more sources
Light Activation of the Phosphoinositide Cycle in Intrinsically Photosensitive Chicken Retinal Ganglion Cells [PDF]
, 2010 Purpose: In vertebrates, intrinsically photosensitive retinal ganglion cells (ipRGCs) acting as nonvisual photoreceptors transmit environmental illumination information to the brain, regulating diverse non–image-forming tasks.
Contin, Maria Ana +5 more
core +1 more source
Randomized trial of polychromatic blue-enriched light for circadian phase shifting, melatonin suppression, and alerting responses. [PDF]
, 2019 Wavelength comparisons have indicated that circadian phase-shifting and enhancement of subjective and EEG-correlates of alertness have a higher sensitivity to short wavelength visible light.
Ayers, M. +12 more
core +2 more sources