PSYCH261 Lecture Notes - Lecture 32: Ganglion Cell Layer, Amacrine Cell, Bipolar Neuron
29 Apr 2019
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Document Summary
Retina consists of three layers: photoreceptive layer, bipolar layer, and the ganglion cell layer (photoreceptors are the deepest; other layers are transparent) Bipolar cell: a bipolar neuron located in the middle layer of the retina, conveying information from the photoreceptors to the ganglion cells; connects the shallowest and deepest layers of the retina. Horizontal cell: a neuron in the retina that interconnects adjacent photoreceptors and the outer processes of the bipolar cells. Primate retina contains about 55 different type of neurons: 1 type of rod, 3 types of cones, 2 types of horizontal cells, 10 types of bipolar cells, 24-29 types of amacrine cells, 10-15 types of ganglion cells. Lamella: a layer of membrane containing photopigments; found in rods and cones of the retina. When light strikes molecules of the photopigment, the hyperpolarization that ensues reduces the amount of neurotransmitter released by the photoreceptor.
