BIOL 030 Lecture Notes - Lecture 15: Foramen Magnum, Spinal Canal, Schwann Cell

• School: College of The Sequoias
• Department: Biology (BIOL)
• Course: BIOL 030
• Professor: puhl

Document Summary

Many cns and pns fibres are unmyelinated. In pns, schwann cells hold small nerve fibres in surface grooves. Found in gray matter on the exterior of the brain. Slower signal, however, usually small cells so it is not essential to be fast. Neurons that convey information to the cns are called sensory, afferent or neurons. To perform their role, neurons must have the properties of excitability, secretion, and conductivity. Neurons receive incoming signals by way of specialized extensions of the cell called dendrites. In the cns, myelin is produced by glial cells called oligodendrocytes. Information highway that connects the brain with the lower body. Nerve fibers conduct sensory and motor information up and down the spinal cord. Spinal neurons receive input from multiple sources, integrate it, and execute appropriate output (e. g. , bladder control) Spinal cord contains central pattern generators: groups of neurons that coordinate repetitive sequences of contractions for walking.