11. The optic nerve was injected with a fluorophore, causing retinal ganglion cells to fluoresce. 12. The recordings showed cell activity was catalyzed from ganglion cells . 13. The axons of ganglion cells form the two optic nerves. 14. The low frequency drop-off is due to lateral inhibition within the retinal ganglion cells . 15. These visual sensory fibers arrive from the retinal ganglion cells . 16. The ganglion cells lie outermost in the retina while the photoreceptive cells lie innermost. 17. In humans, melanopsin is found in intrinsically photosensitive retinal ganglion cells ( ipRGCs ). 18. It consists of over one million retinal ganglion cell axons. 19. Retinal ganglion cells spontaneously fire action potentials at a base rate while at rest. 20. This inhibits the release of neurotransmitters from the bipolar cells to the ganglion cell .