Results 41 to 50 of about 11,542 (237)

A Review of Silent Substitution Devices for Melanopsin Stimulation in Humans

Photonics, 2020
One way to study the specific response of the non-visual melanopsin photoreceptors of the human eye is to silence the response of cones and rods. Melanopsin photoreceptors (ipRGC), highlighted in the early 2000s, are intimately linked to the circadian ...
Vincent Conus, Martial Geiser
doaj   +1 more source

Organization of the dorsal lateral geniculate nucleus in the mouse [PDF]

, 2017
The dorsal lateral geniculate nucleus (dLGN) of the thalamus is the principal conduit for visual information from retina to visual cortex. Viewed initially as a simple relay, recent studies in the mouse reveal far greater complexity in the way input from
Guido, William, Kerschensteiner, Daniel
core   +2 more sources

Dopamine modulates the retinal clock through melanopsin-dependent regulation of cholinergic waves during development

BMC Biology, 2023
Background The mammalian retina contains an autonomous circadian clock that controls various aspects of retinal physiology and function, including dopamine (DA) release by amacrine cells. This neurotransmitter plays a critical role in retina development,
Chaimaa Kinane, Hugo Calligaro, Antonin Jandot, Christine Coutanson, Nasser Haddjeri, Mohamed Bennis, Ouria Dkhissi-Benyahya   +6 more
doaj   +1 more source

Myopes have significantly higher serum melatonin concentrations than non-myopes [PDF]

, 2017
Purpose Experimental animal models of myopia demonstrate that higher melatonin (Mel) and lower dopamine (DA) concentrations actively promote axial elongation.
Ackermann, Atkinson, Ayaki, Baba, Barnard, Beck-Friis, Benavente-Pérez, Benloucif, Berg, Bertolet, Besharse, Breslin, Brown, Cahill, Chang, Chiba, Chua, Delgado, Dong, Eisenberg, Fan, Freedman, Guo, Hammond, He, Hua, Huang, Huang, Hughes, Iuvone, Jee, Kivelä, Lanyon, Logan, Lu, Mallen, Mao, Martin, McCullough, Megaw, Megaw, Nickla, Nickla, Ohngemach, Panda, Pendrak, Rada, Rao, Riefahn, Rohrer, Rose, Rudnicka, Sankaridurg, Skene, Stone, Stone, Stormann, Tosini, Trier, Verkicharla, Wahl, Wallman, Wang, Weiss, Wiechmann, Wiechmann, Wilson, Witkovsky, Wu, Xu, Zhang   +70 more
core   +2 more sources

RdgB2 is required for dim-light input into intrinsically photosensitive retinal ganglion cells. [PDF]

, 2015
A subset of retinal ganglion cells is intrinsically photosensitive (ipRGCs) and contributes directly to the pupillary light reflex and circadian photoentrainment under bright-light conditions.
Berson, David M, Elsaesser, Rebecca, Güler, Ali D, Hattar, Samer, Montell, Craig, Rupp, Alan, Sheng, Wenlong, Walker, Marquis T, Weng, Shijun   +8 more
core   +2 more sources

Melanopsin Shows Its (Contrast-)Sensitive Side [PDF]

Neuron, 2018
Melanopsin is a photopigment expressed by certain types of retinal ganglion cells that mediate non-image-forming visual functions, such as circadian photoentrainment. In this issue of Neuron, Sonoda et al. (2018) reveal how melanopsin also regulates the sensitivity of conventional image-forming vision.
Joseph, Pottackal, Jonathan B, Demb
openaire   +2 more sources

Characterization of the melanopsin gene (Opn4x) of diurnal and nocturnal snakes

BMC Evolutionary Biology, 2019
Background A number of non-visual responses to light in vertebrates, such as circadian rhythm control and pupillary light reflex, are mediated by melanopsins, G-protein coupled membrane receptors, conjugated to a retinal chromophore.
Einat Hauzman, Venkatasushma Kalava, Daniela Maria Oliveira Bonci, Dora Fix Ventura   +3 more
doaj   +1 more source

Form vision from melanopsin in humans [PDF]

Nature Communications, 2019
AbstractDetection and discrimination of spatial patterns is thought to originate with photoreception by rods and cones. Here, we investigated whether the inner-retinal photoreceptor melanopsin could represent a third origin for form vision. We developed a 4-primary visual display capable of presenting patterns differing in contrast for melanopsin vs ...
Annette E. Allen, Franck P. Martial, Robert J. Lucas   +2 more
openaire   +3 more sources

Blue light stimulation of the blind spot in human: from melanopsin to clinically relevant biomarkers of myopia. [PDF]

Bioelectron Med
Amorim-de-Sousa A, Chakraborty R, Collins MJ, Fernandes P, González-Méijome J, Hannibal J, Hoseini-Yazdi H, Read SA, Ellrich J, Schilling T.   +9 more
europepmc   +3 more sources

Melanopsin: Another Way of Signaling Light [PDF]

Neuron, 2006
A subset of melanopsin-expressing retinal ganglion cells has been identified to be directly photosensitive (pRGCs), modulating a range of behavioral and physiological responses to light. Recent expression studies of melanopsin have provided compelling evidence that melanopsin is the photopigment of the pRGCs.
Peirson, Stuart, Foster, Russell G.
openaire   +2 more sources