PSY 105 Lecture Notes - Lecture 3: Hindbrain, Reticular Formation, Motion Detection
10 Apr 2017
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Document Summary
They are brain cells with 86 billion neutrons with 160 billion connections. Cell body (soma): centre of neuron builds new cell components. Dendrites: branchlike extension that receive information from other neurons. Axons: tails of the neuron that spread out from the cell body and transit information. Axon terminal: end of the axon contacting synaptic vesicles lled with neurotransmitters. Glial cells: cell in the nervous system that plays a role in the formation of myelin and the blood brain barrier responds to injury, removes debris, and enhances learning and memory (glial means glue) Type 1 astrocytes: most abundant, found in blood brain barrier, increase reliability of neuronal transmissions, control blood ow in brain. Type 2 oligodendrocytes: promotes new connections, produce the myelin sheath around axons. Myelin sheath: glial cells wrapped around axons that act as insulators of the neuron"s signal. Neurons respond to nts by generating electrical activity. Resting potential: when the neuron is not being stimulated or inhibited.
