PSYCH 100 Lecture Notes - Lecture 3: Myelin, Schwann Cell, Cracking Joints

• School: UMASS-Amherst
• Department: Psychology & Brain Sciences
• Course: PSYCH 100
• Professor: tamararahhal

Document Summary

Outline chapter 3 (mod 7, 8, 9) Neuroscience & behavior: neurons and neural communication, neurons/neural impulses, neural communication, neurotransmitters, nervous system, the brain, structure and function, reflexes vs. neural networks, studying the brain, brain regions/function, plasticity, hemispheric differences. You panic~ muscles tense up, heart rate increases, adrenaline rush, become hyper-aware, stomach hurts, mouth dries up. Axon - the outbox" (axon-away); it sends signals to. Myelin sheath - a fatty substance that encases the axons of some cells. Terminal vesicles - are released into the intercellular space (synapse: increases the speed of transmission, created by schwann cells, stores and eventually releases enzymes called neurotransmitters (nt). Neurons: communication - within action potential: all neurons have a resting state (-70 mv, dendrite is stimulated. Positive ions flow into the cell until the charge is raised: threshold is reached (-55 mv) Action potential is triggered (all-or-nothing: wave moves down the axon, wave reaches the terminal vesicles.