PSYCH 230 Study Guide - Midterm Guide: Receptive Field, Retina, Retina Horizontal Cell
Document Summary
Unintuitive bc extraction of information is based off of contrasts: but reveals the nature of perception: compartmentalized bits of information come together somehow to create a whole perception. Sensory adaptation = refers to the rapid return of stimulus-evoked increases in sensory neruon firing to baseline, if the stimulus does not change. For access to blood/ capillaries; but is blocked by ganglion cells, bipolar and other cells that are in front photoreceptor cells are graded, vs, retinal ganglion cells which are normal ap-based. Retina- the info is mediated by the bipolar cells (horizontal cells and amacrine cells) Contrast enhancement already takes place here before reaching the brain for processing. 100 million rods and 4 million cones, per 1 million ganglion cells. Cones are primarily in the fovea; individual cones are connected to bipolar ganglion cells. More of the brain is devoted to photopic vision. Rods: transduction in rods: light leads to hyperpolarization.
