PSYC 1010 Chapter Notes - Chapter 3: Cerebellum, Voltage Spike, Quantitative Trait Locus

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Jennifer Steeves

Document Summary

Cell types in the brain: glia support cells; constantly replacing themselves; ~1 trillion glial cells. Provide insulation increase speed of neurons. Saltatory conduction: myelin sheaths glia wrap around axon, nodes of ranvier gaps between glia, action potential jumps between nodes. Multiple sclerosis: decay of myelin sheaths; axons are exposed and break down. Impaired sensation of movement: may be an autoimmune disorder. Little hill at the junction of the cell body and the beginning of the axon: gathers information from dendrites. Postsynaptic potentials: postsynaptic on the dendrites (or sometimes the cell body) of the receiving neuron, potential voltage difference, excitatory post-synaptic potentials yes votes. Drug actions: drugs can act at any stage of synaptic transmission, agonists drugs that increase the effectiveness of synaptic transmission, antagonists drugs that decrease the effectiveness of synaptic transmission. 6aba inhibitory transmitter that contributes to regulation of anxiety: endorphins opiate-like chemicals involved in modulation of pain, glutamate excitatory transmitter linked to memory process of long-term potentiation.