PSYC62H3 Lecture Notes - Lecture 1: Raphe Nuclei, Catechol-O-Methyl Transferase, Cerebral Cortex
29 Jan 2018
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Must take place before neurotransmitters can be released. Series of electrical events called action potentials. Action potentials begin at an axon hillock and proceed down the length of an axon. Difference between the electrical charge within a neuron and of the environment. Polarized - one side is positively charged, while the other side is negatively charged. Depolarization - a reduced difference between the (+) and (-) charges on each side. Hyperpolarization - an increased difference between the (+) and (-) charges on each (-70 mv) of a membrane (-40 mv) side of a membrane (-90 mv) Local potential - electrical potential on a specific part of a neuron. Ion channels - pores in a neuronal membrane that allow the passage of ions (charged particles) Excitatory postsynaptic potential (epsp) - stimulus that depolarizes a local potential. Inhibitory postsynaptic potential (ipsp) - hyperpolarizes a local potential. Neurons release neurotransmitters from the axon terminal is through electrochemical signals called nerve impulses.
