BIO 208 Lecture Notes - Lecture 11: Whiskers, Pathfinding, Midbrain
19 Sep 2016
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4/3 (d/2)3: in fact most of the volume is in the axon and dendrites so that the average soma volume is considerably smaller: <10 m3. High degree of specificity: precise wiring for visual system to achieve binocular vision: Input from each point in visual space must project to same place in the brain through both eyes. Therefore, each point in the binocular region of the visual cortex looks at the same point in space through both eyes. Requires high degree of precision for binocular disparity to occur: frog and eye: A was on the top, now it"s on the bottom. A will still be activated, but diff location, mislocate targets! Embryo: notochord produces chemical signals leading to formation of neuroectoderm . Cells are born near the central canal (undergo their last division) Migrate out to final positions along glia arranged radially. Glial scaffold (scaffold composed of glial cells) Tube thickens on the outside, cells build on the outside.
