Anatomy and Cell Biology 4451F/G Lecture Notes - Lecture 2: Hindbrain, Neural Tube, Human Brain
12 Sep 2018
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Lecture 2: brain evolution: 302 neurons, 5000 chemical synapses, 200 gap junctions, worm is transparent we can see neurons in the live animal, genome is completely sequenced, you can order mutations to express in your c. elegans, ex. Express all of one certain type of neurons express green fluorescent protein so that you can see it in the living animal. Brain evolution: condensation: the very low evolved animals have very diffused/primitive neuronal networks, moving to the leach, you observe that leach is bilateral so nervous system s bilateral. It also starts to condensate (we see things like nerve, axons and processes of neurons that start to clump together: snail has formation of ganglions (cell bodies of neurons start to clump together). Condensation is seen as well: vertebrates have vertebrae and within that is the spinal cord (cns) and at the head end is the brain.
