Fig. 8From: Type I intrinsically photosensitive retinal ganglion cells of early post-natal development correspond to the M4 subtypeM4/alpha-on cells have Type I cell physiology. a M4 light responses fall into the Type I category using the MEA subtyping criteria for on-latency and photosensitivity. b Loose patch traces of M4 cell at IR 12.0 and 13.6. c M4 cells have a range of responses in total spiking and peak firing similar to MEA Type I cells. d The identity of loose patch recorded cells was confirmed by co-staining with lucifer yellow, melanopsin and SMI-32 antibodies. Scale bar = 50 μmBack to article page