M1 Intrinsically Photosensitive Retinal Ganglion Cells Integrate Rod and Melanopsin Inputs to Signal in Low Light

Dec 12, 2019Cell reports

Light-sensitive retinal cells combine rod and melanopsin signals to detect dim light

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Abstract

M1 ipRGCs exhibit a wide spectrum of responses to dim light driven by both rod signals and melanopsin.

  • M1 ipRGCs integrate rod and melanopsin signals to respond to low light.
  • Responses to dim light vary significantly among M1 ipRGCs.
  • Rod input is associated with larger and more complex dendritic structures in M1 ipRGCs.
  • Melanopsin contributes notably to the light responses of M1 ipRGCs under very low light conditions.

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