Summary
This doctoral work reviews the biology of intrinsically photosensitive retinal ganglion cells (ipRGCs), their role in photoreception, and their contributions to neural circuit formation and refinement during development. Understanding ipRGC diversity and downstream projections is foundational for designing lighting systems that effectively engage non-visual pathways, including those governing circadian entrainment and pupillary responses.
Key Findings
- More than 40 retinal ganglion cell (RGC) types have been identified in mice via functional, morphological, and transcriptomic surveys.
- RGCs innervate more than 50 distinct brain areas as indicated by anterograde tracing, highlighting the broad influence of retinal light signals on brain function.
- ipRGCs play developmental roles in neural circuit formation and refinement beyond simply mediating circadian photoentrainment.
Categories
The Science of Light: Reviews ipRGC photoreception biology, photoreceptor diversity, and the neural circuitry underlying non-image-forming light responses relevant to circadian and other light-mediated functions.
Eye Health & Vision: Examines retinal ganglion cell types, their feature selectivities, and downstream projections, providing foundational knowledge for understanding retinal function and visual processing.
Author(s)
KS Chew
Publication Year
2014
Related Publications
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice
Eye Health & Vision
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Genetic reactivation of cone photoreceptors restores visual responses in retinitis pigmentosa
- Melanopsin and rod–cone photoreceptors play different roles in mediating pupillary light responses during exposure to continuous light in humans
- Characteristic patterns of dendritic remodeling in early-stage glaucoma: evidence from genetically identified retinal ganglion cell types
- Intrinsically photosensitive melanopsin retinal ganglion cell contributions to the pupillary light reflex and circadian rhythm