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

M1 intrinsically photosensitive retinal ganglion cells (ipRGCs) control an array of non-image-forming functions. Lee et al. report diverse light responses of M1 ipRGCs in scotopic light that are determined by the degree of rod and melanopsin inputs and find that degree of rod input correlates with dendritic complexity.