01:830:310 Lecture 2: Development of Neurons
23 Feb 2016
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Document Summary
Around 100 billion or (10 to the 11th), although some say double the amount. Each neuron on avg. has connections to other cells and neurons. Information transmission (sending info from one cell to another) Receive info through dendrites(from greek word dendron, meaning tree) 10 to 50 times more of these then neurons. Blood brain barrier or some just for support. Have myelin around axons to help them move faster. Tract/fiber tract/pathway: large collections of axons (traveling together in groups) Autoimmune disease: being attacked by one"s own immune system. Most likely due to genetic and or environmental triggers. Was once thought that people whom were further aware from the equator, the more likely you were to have it (vitamin d deficiency?) Discovered it was an ethnicity issue and latitude issue. Lap people: live off the reindeer in the extreme north (rarely get ms) Symptoms (can"t send info efficiently, info transmission is broken) Motor (can"t move properly, coordination, bowel, speech problems)
