Kinesiology 3222A/B Lecture Notes - Lecture 1: Foramen Magnum, Axon Terminal, Synapse
14 Jan 2015
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Document Summary
The spinal cord connects to the brain at the foramen magnum. A plexus is a network of neurons and axons, enteric plexus is the nervous system of the gut. Don"t participate directly in synaptic interactions or information processing. Primary target for synaptic input from other neurons. Initial segment: where the first action potential begins. Target of anterograde transport (cell body terminal) Originator of retrograde transport (terminal cell body) Used for pain relief often in pregnancies (analgesia) Gray matter receives and integrates incoming/outgoing information (neuron body themselves, no myelin) Shwann cells make myelin in the pns and oligodendrocytes in the. Diseases that destroy these cells are auto immune diseases. Requires fewer neurons because there are no limbs in this region that has to be controlled. Axons degenerate distal to lesion toward the axon. Degeneration: axotomy damage to the axon, wallerian degeneration distal degeneration, myelin and axon breakdown, monocyte infiltration iii. However preserved endometrium of crush supports a better recovery.
