PSYC 271 Lecture Notes - Lecture 9: Electrical Synapse, Reuptake, Acetylcholine

• School: Queen's University
• Department: Psychology
• Course: PSYC 271
• Professor: Tyson Baker

Document Summary

Oct 9: travel passively from their synapse(s, decremental (graded)- gets smaller as they travel, like hot and cold water from separate faucets in a tub (but super-fast like electricity) Integration of psps and generation of action potentials (aps: o(cid:374)e ep p typi(cid:272)ally (cid:449)ill (cid:374)ot suffi(cid:272)e to (cid:272)ause a (cid:374)euro(cid:374) to (cid:862)fire(cid:863) (rea(cid:272)h threshold a(cid:374)d (cid:272)ause an ap) and release neurotransmitter- summation is needed. In order to generate an ap, the threshold of activation must be reached near the axon. Integration of ipsps and epsps must result in a potential of about -65mv to generate ap. Conduction of aps: all-or-(cid:374)o(cid:374)e: (cid:449)he(cid:374) the threshold is rea(cid:272)hed, the (cid:374)euro(cid:374) (cid:862)fires(cid:863) a(cid:374)d the a(cid:272)tio(cid:374) pote(cid:374)tial either o(cid:272)(cid:272)urs or it does(cid:374)"t, shooting a gun analogy. Firing rate: the activity of an individual neuron is measured in the rate of firing, not the size of action potential, reaches point where cannot fire any faster.