PSY 2301 Chapter Notes - Chapter 3: Schwann Cell, Axon Hillock, Pyramidal Cell
6 Dec 2016
School
Department
Course
Professor
Document Summary
3 basic subdivisions of neurons: cell body, dendrites, axons, more than 100 billion neurons. 3)purkinje cell extremely branched dendrites forming fan shape. 3)motor neurons: extensive dendritic networks, large soma, long axons that connect with muscles, in lower brainstem and spinal cord; all efferent info passes through them. Neural networks sensory neurons collect interneurons process info motor neurons move. Large neurons = somatosensory, pyramidal, motor: large cell bodies usually have long extension length; long dendrites carry info to distal parts of the ns whereas short dendrites are responsible for local processing. Glial cells and neuron repair: severed motor-neuron axons = unable to move affected area, severed sensory-neuron axons = unable to have sensation in affected area, cessation of both = paralysis. In pns: human body can repair this nerve damage with microglia and schwann cells, when axon is cut, the axon, the. Schwann cells shrink: the neuron sends out, the little.
