PSYC 212 Lecture Notes - Lecture 20: Cortical Blindness, Auditory Cortex, Visual Cortex

• School: McGill University
• Department: Psychology
• Course: PSYC 212
• Professor: Mathieu Roy

Document Summary

Psyc 212 lecture 20 april 3rd. Cross-modal plasticity sensory compensation and sensory substitution (dr. slimani) When you deprive a cat form its vision early on, most of the cells that are supposed to respond to the right eye, end up responding only to the left. If you create amblyopia, then the overlap between the two images will disappear from the brain. Cortical maturation: there are critical periods for plasticity, so basically there are periods in which these major changes can happen. If you pass the (cid:272)(cid:396)iti(cid:272)al pe(cid:396)iod, it"s too late; (cid:455)ou (cid:272)a(cid:374) ha(cid:448)e (cid:373)i(cid:374)o(cid:396) (cid:272)ha(cid:374)ges, (cid:271)ut that"s it. There are ways to change the time of occurrence of these critical periods by changing some chemicals in the brain, mainly gaba neurotransmitters. Graph: critical periods happen ea(cid:396)l(cid:455) i(cid:374) de(cid:448)elop(cid:373)e(cid:374)t, a(cid:374)d if (cid:455)ou (cid:449)ait too lo(cid:374)g the(cid:374) it"s too late for the brain to adapt efficiently.