PSYC 2390 Lecture Notes - Lecture 4: Amacrine Cell, Retinal Pigment Epithelium, Lateral Inhibition

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2390
• Professor: Lana Trick

Document Summary

Photochemicals: retinal + opsin (when separated brought back together by pigment epithelium enzymes regenerate) After effect: experience of seeing one thing causes you to see another. Cells looking at black are well relaxed can produce more aps, and on white are now tired/fatigued (cid:374)euro(cid:374)s a(cid:374)d do(cid:374)"t produce as (cid:373)a(cid:374)y aps whe(cid:374) (cid:374)o lo(cid:374)ger looki(cid:374)g at i(cid:373)age. What we perceive is related to number of ap/sec. Convergence and spatial (lateral) summation: 126 million rods and cones per eye 1 million ganglia. Lateral inhibition: cells side by side sometimes cell inhibitory lateral receptors to each other (neurons. This situatio(cid:374) highlights it the difference between a and b. (a in light, has aps, inhibits b. B in dark and being inhibited, not sending ap: amacrine cells create inhibitory neurotransmitters for neighbours, eye ommatidium (photoreceptor with a lens over it. Connected via lateral plexus: mock bands: looks brighter than really is, looks darker than it really is.