PSY100H1 Lecture Notes - Lecture 5: Myelin, Axon Terminal, Reuptake

• School: UTSG
• Department: Psychology
• Course: PSY100H1
• Professor: Dan Dolderman

Document Summary

Interneurons: vastly outnumber motor and sensory neurons, facilitate within cns transmission of information. Structure of a neuron: dendrites, receive information from other neurons and transmit towards the cell, the start , one neuron is attached to axon terminal of hundreds of other cells at any body given time, cell body: keeps the cell alive. To make a decision (whether or not it is going to fire) Electrically regulated (has a net negative charge) All or nothing principle: drugs can change the rate of reuptake (inhibit so more of it is floating in the synaptic cleft) exp. : serotonin: key neurotransmitters and their primary function, glutamate, acetylcholine (ach): (excites) and gaba (inhibits) are opposite has different function whether you are talking about. Unconscious habit mood, emotion, motivation reward, higher cognition, universal pleasure mechanism: epinephrine/nor-e, serotonin, dopamine: fundamental arousal/alertness, hedonism guides everything we do, dopamine is the main neurotransmitter (pleasure-pain) for hedonism, drugs of abuse commandeer the brains natural reward circuitry.