PSYC62H3 Chapter Notes - Chapter 3: Dopamine Receptor D1, Basal Forebrain, Essential Amino Acid
31 Jan 2017
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Document Summary
Electrical events within a neuron and the release of nts. Electrical transmission: series of electrical events that begin at an axon hillock and proceed down the length of an axon. Electrical potential: difference between the electrical charge within a neuron vs. electrical charge of the environment immediately outside the neuron. Normally neuron charge is negative compared to outside: leaves membrane polarized: one side charge is negative, other side is positive. Depolarization: reduced difference between the positive and negative charges on each side of a membrane. Hyperpolarization: increased difference between the positive and negative charges on each side of a membrane. Excitatory postsynaptic potential (esp): depolarizes a local potential. Inhibitory postsynaptic potential (isp): hyperpolarizes a local potential. Nerve impulses: comprised of changes from resting potentials to action potentials: can cause neurons to release nts, electrochemical signal. Resting potential: negatively charged local potential that precedes an action potential: depends on nervous system, relative concentration of ions within and outside a neuron.
