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Are ipRGCs Involved in Human Color Vision? Hints From Physiology, Psychophysics, and Natural Image Statistics [PDF]
Vision ResearchHuman photoreceptors consist of cones, rods, and melanopsin-expressing intrinsically photosensitive retinal ganglion cells (ipRGCs). First studied in circadian regulation and pupillary control, ipRGCs project to a variety of brain centers suggesting a ...
Barrionuevo, Pablo A. +2 more
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Spatial distribution and functional integration of displaced ipRGCs
2023Abstract The mammalian retina contains many distinct types of ganglion cells, which form mosaics to evenly tile the retina with cells of each type at each position of the visual field. It is well known that displaced retinal ganglion cells (dRGCs) exist with cell bodies in the inner nuclear layer, along with regularly placed RGCs with ...
Sabrina Duda +5 more
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M1 ipRGCs Influence Visual Function Through Retrograde Signaling in the Retina [PDF]
Journal of Neuroscience, 2016 Melanopsin-expressing intrinsically photosensitive retinal ganglion cells (ipRGCs, with five subtypes named M1-M5) are a unique subclass of RGCs with axons that project directly to many brain nuclei involved in non-image-forming functions such as circadian photoentrainment and the pupillary light reflex.
Chi-Chan Lee, Shih-Feng You, Po-Ting Yeh
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Melanopsin activates divergent phototransduction pathways in ipRGC subtypes
2022Abstract Melanopsin signaling within ipRGC subtypes impacts a broad range of behaviors from circadian photoentrainment to conscious visual perception. Yet, how melanopsin phototransduction within M1-M6 ipRGC subtypes impacts cellular signaling to drive diverse behaviors is still largely unresolved.
Ely Contreras +3 more
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Influence of ipRGC activation on retinal physiology
2023The intrinsically photosensitive retinal ganglion cells (ipRGCs) are photoreceptors in the mammalian retina expressing the photopigment melanopsin. Upon light activation ipRGCs signal light information to the brain either via an intrinsic light response or acting as conduits for rod and cone light responses.
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Neuron, 2012 SummaryIntrinsically photosensitive retinal ganglion cells (ipRGCs) and their nuclear targets in the subcortical visual shell (SVS) are components of the non-image-forming visual system, which regulates important physiological processes, including ...
Alessio Delogu +2 more
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The cognitive impact of light: illuminating ipRGC circuit mechanisms
Nature Reviews NeuroscienceEver-present in our environments, light entrains circadian rhythms over long timescales, influencing daily activity patterns, health and performance. Increasing evidence indicates that light also acts independently of the circadian system to directly impact physiology and behaviour, including cognition. Exposure to light stimulates brain areas involved
Heather L. Mahoney, Tiffany M. Schmidt
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Pupillary responses driven by ipRGCs and classical photoreceptors are impaired in glaucoma
Graefe's Archive for Clinical and Experimental Ophthalmology, 2016The aim was to investigate the involvement of intrinsically photosensitive retinal ganglion cells (ipRGCs) in patients with manifest glaucoma and ocular hypertension (OH) using specific parameters of the pupil light reflex to chromatic stimuli.Twenty-five patients with manifest glaucoma, 16 patients with OH and 16 healthy control subjects were ...
Carina, Kelbsch +6 more
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EFFECT OF IPRGC STIMULATION ON CONTRAST SENSITIVITY IN CENTRAL VISION
CIE x051:2025 Proceedings of the CIE 2025 Midterm Meeting Vienna, Austria, July 4-11, 2025: Scientific Conference (July 7-9, 2025)Since the discovery of the intrinsically photosensitive retinal ganglion cells (ipRGCs), their roles have been investigated by vision researchers around the world, and their effects on non-image-forming functions, such as circadian rhythm and pupillary light reflex, are now being evaluated.
Hiroshi Takahashi +4 more
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