PSYC 211 Lecture Notes - Lecture 3: Insomnia, Botulinum Toxin, Diazepam

• School: McGill University
• Department: Psychology
• Course: PSYC 211
• Professor: Yogita Chaudasama

Document Summary

Lecture 3: how do neurons communicate with each other. Synaptic transmission messages from 1 to another neurons through synapse. Synaptic vesicles nt presynnaptic membrane attach release into synaptic cleft. Junction btw terminal button (sending neuron) and portion of the dentritic membrane (receiving) Presynaptic membrane synapse postsynaptic membrane (on either soma or dendrite/axon) Na-k channels na outside, when channels open influx of na depolarization epsp (excitatory postsynaptic potential) K channels open k leave efflux hyperpolarization ipsp (inhibitory postsynaptic potential) Influx of cl- hyperpolarization (ipsp) only when membrane depolarised neutralising epsp. Neural integration interaction of excitatory and inhibitory synapses on particular neuron. Several excitatory synapses same time epsp down the axon fire. Several inhibitory synapses can inhibit/diminish epsp prevent the firing. Inhibition of inhibitory neurons behaviour more likely to occur. Excitation of neurons that inhibit a behaviour suppresses that behaviour. Psychopharmacology (study of effects of drugs on ns and behaviour) drugs and their effectiveness.