PSYCH 2NF3 Lecture 24: Spinal Cord Continued + Neurons and Glia
22 Jan 2019
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Document Summary
Spinal cord: spine is made up of stacked bones (vertebrae) in between each of the vertebrae is a small disc (made up of fober and other substances) that allow for shock absorption herniated disc: a slipped / ruptured disc. Most common in the lumbar (lower back) or cranial (nerve) regions of the spine. Risk factors include results in a lot of pain: weight (pressure, occupation, genetics. A common occurrence in all ages: happens in men women and children. Medications: over the counter pain meds, narcotics, ex: oxytocin, anticonvulsants. Surgeons can remove just the protruding portion of the disk. Rarely, however, the entire disk must be removed: in these cases, the vertebrae may need to be fused together with metal hardware to provide spinal stability, rarely, surgeon may suggest the implantation of an artificial disk. For half a century, the human brain was believed to contain: about 100 billion neurons, one trillion glial cells, glia:neuron ratio of 10:1.
