PS101 Lecture Notes - Lecture 6: Cerebellum, Spinal Cord, Peripheral Nervous System
Document Summary
Like the glue that holds neurons together: waste system; removes waste such as dead neurons, can in some cases act like a neuron . Firing of neuron: resting potential, battery -70 millivolts, negative charge, action potential, stimulated, channels in membrane open, positively charged sodium ions enter, shift in electrical charge. All-or-none law: neuron either fires or it doesn"t. Intensity is conveyed by the rapidity of firing. Synapse where neurons meet: structures at synapse, axon terminal, synaptic vesicles. Transmit info between neurons: synaptic cleft. Neurotransmitters: acetylcholine between motor neurons and voluntary muscles, throughout nervous system, agonists excite increase likelihood of firing. Black widow: antagonists opposes decreases likelihood of firing. Predominant in anger: gaba (gamma- aminobutyric acid) Relieve pain and produce feelings of pleasure and well-being: runner"s high. Monoamines 3 neurotransmitters: dopamine, excites and inhibits learning, attention, movement, and reinforcement, norepinephrine, affects eating habits, alertness, and wakefulness, predominant in fear, serotonin, plays role in regulating mood, sleep, impulsivity, aggression and appetite.
