This excites me for the Retinal Neurophysiology seminar that I'll be taking next term:
Andy Fischer (2008).
This photomicrograph of a chick's retina was also produced using an antibody staining. It reveals the three basic stages of visual processing by the circuit in the eye that detects light and transforms it into signals the brain can understand. At the top of the image are the retina's photoreceptor cells (in gray)--the familiar rods and cones--that capture photons of light and translates them into electrical currents.
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