PSY 3061 Lecture Notes - Lecture 3: Neuroglia, Striatum, Peripheral Nervous System
Document Summary
[divisions of the nervous system: nervous system, central division (cns) Brain & spine: peripheral division (pns) Sensory & motor nerves: nervous system, central nervous system. Somatic nervous system: afferent nerves, efferent nerves. Autonomic nervous system: afferent nerves, efferent nerves, sympathetic nervous system, parasympathetic nervous system. [two classes of nervous tissue: nerve cells (or neurons, excitable tissue. Approximately 86 billion in the brain: glial cells (or glia in greek = glue) Support neuronal structure and function: neurons vs. other cells, ability to send/receive charge-impulses, high metabolism, most neurons form during fetal development and play a functional role into elderly stages, unable to divide (non-mitotic), neuronal structure, soma. Branching of axon: axon terminals/boutons, myelin & nodes of ranvier. [many neural structure types: unipolar neuron, bipolar neuron, multipolar neurons. [dendrites & axons differ: dendrites receive and carry electrical impulse towards the soma, axons carry electrical impulse away from the soma.
