Results 51 to 60 of about 4,663 (179)
Melanopsin Cell Dysfunction is Involved in Sleep Disruption in Parkinson’s Disease
Journal of Parkinson’s Disease, 2020 Background: Melanopsin-expressing intrinsically photosensitive retinal ganglion cells (ipRGCs) signal the environmental light to mediate circadian photoentrainment and sleep-wake cycles.
Beatrix Feigl +3 more
doaj +1 more source
Frontiers in Neuroscience, 2020 Intrinsically photosensitive retinal ganglion cells (ipRGCs) express the photopigment melanopsin and project to central targets, allowing them to contribute to both image-forming and non-image forming vision.
Cyril G. Eleftheriou +5 more
doaj +1 more source
Photochemistry and Photobiology, EarlyView.The left panel reports the measured time course data of melatonin concentration in the blood plasma of 17 BL‐Rs and 15 BL‐NRs at baseline, during a two‐hour stay in the dark, during a one‐hour light exposure to blue light, and again in the dark. The right panel shows the magnitude of melatonin concentration after 60 min of exposure to warm white, cool ...
Helmut Piazena +4 more
wiley +1 more source
Widespread Variation in Retinochrome Spectral Absorbance Across Scallop Phylogeny
Molecular Ecology, Volume 35, Issue 11, June 2026.ABSTRACT Vision is a two‐step process, including phototransduction initiated by a retinal‐bound opsin photopigment, and subsequent photopigment regeneration wherein the inactive state is restored. Because retinal isomerization, or changing of the molecular structural conformation, drives the activation of opsin photopigments, the reverse process is a ...
Kyle E. McElroy +3 more
wiley +1 more source
Advanced Functional Materials, Volume 36, Issue 42, 26 May 2026.We present ultrathin flexible transparent electrodes through iCVD‐enabled molecular control of 10 nm gold films on poly(dimethylaminomethylstyrene). In vivo validation demonstrated photoelectric artifact reduction vs. opaque electrodes and preservation of natural neural dynamics.
Tae Jin Mun +11 more
wiley +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 +2 more
openaire +3 more sources
Advanced Science, Volume 13, Issue 28, 18 May 2026.Ectodermal tissue excised from Xenopus embryos self‐organizes into a three‐dimensional mucociliary organoid. Here, we generate a neural variant, termed neurobot, by implanting neural precursor cells. Neurobots develop mature neurons, adopt distinct morphologies, exhibit more complex motility, and respond differentially to neuroactive compounds. Imaging
Haleh Fotowat +6 more
wiley +1 more source
Neural Regeneration Research, 2016 Light is an electromagnetic stimulus that in mammals is sensed by specialized neurons in the retina. The physiological response to light encompasses two fundamental and different functional outputs: image-forming and non-image forming. The image-forming response is classically known as vision, while the non-image forming responses include the circadian
Agudo-Barriuso, Marta +5 more
openaire +4 more sources
Acta Neuropathologica Communications, 2018 Parkinson’s disease (PD) patients often suffer from non-motor symptoms like sleep dysregulation, mood disturbances or circadian rhythms dysfunction. The melanopsin-containing retinal ganglion cells are involved in the control and regulation of these ...
Isabel Ortuño-Lizarán +6 more
doaj +1 more source
Midbrain PAG Astrocytes Modulate Mouse Defensive and Panic‐Like Behaviors
Advanced Science, Volume 13, Issue 19, 2 April 2026.Astrocytes in the midbrain periaqueductal gray (PAG) dynamically encode threat intensity and shape defensive action selection in mice. Real‐time Ca2+ imaging reveals robust astrocytic activation during predator odor and CO2 exposure. Aberrant astrocytic Ca2+ overactivation disrupts goal‐directed escape, biases behavior toward freezing, and induces ...
Ellane Barcelon +10 more
wiley +1 more source