PSY 1101 Lecture Notes - Hindbrain, Neocortex, Myelin

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Kenneth Campbell

Document Summary

Mcgills: 20% given a placebo, 35% psychiatrists prescribed meds below minimal recommended dose. Action potentials: if the level excitation is not enough (the critical threshold is not reached) the depolarization will reverse (the neuron will return to the resting potential). The depolarization will not travel down the axon. The action potential will travel down the length of the axons; long axons are mylineated (they have a myelin sheath). At places the axon (called the nodes ) is exposed. (message is like telephone) this allows the action potential to jump from node to node. Thus, transmission is much faster in mulineated axons. Thus, transmission is slower in short neurons. (ex stepping on someone foot, fast reaction but pain stays. Or hand on burner pain will continue) Synaptic transmission: under the influence of the action potential, neurotransmitters are released in the synaptic gap. Neurotransmitter long-term effect until its action are terminated.