title: Circuit Mechanisms of a Retinal Ganglion Cell with Stimulus-Dependent Response Latency and Activation Beyond Its Dendrites.
abstract: Center-surround antagonism has been used as the canonical model to describe receptive fields of retinal ganglion cells (RGCs) for decades. We describe a newly identified RGC type in the mouse, called the ON delayed (OND) RGC, with receptive field properties that deviate from center-surround organization. Responding with an unusually long latency to light stimulation, OND RGCs respond earlier as the visual stimulus increases in size. Furthermore, OND RGCs are excited by light falling far beyond their dendrites. We unravel details of the circuit mechanisms behind these phenomena, revealing new roles for inhibition in controlling both temporal and spatial receptive field properties. The non-canonical receptive field properties of the OND RGC-integration of long temporal and large spatial scales-suggest that unlike typical RGCs, it may encode a slowly varying, global property of the visual scene.
authors.affiliation: Department of Ophthalmology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
authors.forename: Adam
authors.initials: A
authors.lastname: Mani
authors.affiliation: Department of Ophthalmology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Neurobiology, Weinberg College of Arts and Sciences, Northwestern University, Evanston, IL 60208, USA. Electronic address: greg.schwartz@northwestern.edu.
authors.forename: Gregory W
authors.initials: GW
authors.lastname: Schwartz
mesh_terms: D000818:Animals; D003712:Dendrites / Q000502:physiology*; D005260:Female; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009433:Neural Inhibition / Q000502:physiology*; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology*; D012165:Retinal Ganglion Cells / Q000502:physiology*
keywords: center-surround; circuit; extra-dendritic; ganglion cells; image focus; latency; mouse; receptive field; retina; serial inhibition