Anatomy and Cell Biology 3319 Lecture Notes - Lecture 3: Neural Plate, Sulcus Limitans, Midbrain Tectum
23 Oct 2017
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Document Summary
Be able to describe the stages of development of the nervous system. Determine the embryonic origins of adult brain structures. The idea that the brain is in some ways a rounded structure. It didn"t start this way - started as the neural plate with the ectoderm. What happens: in order to create the neural tube that eventually develops, the plate has to begin to fold. The neural groove forms the basis of the cns. Neural crest cells eventually become another set of neutrons important - separating off from tube developing. Rostral and caudal (head and tail) ends. Over time, fold becomes even more pronounced. Layer of cells, inside (instead of air) we have uid. Fluid eventually turns into cerebral spinal uid. Neural crest cells break off and become separate clumps. Closure of the neural tube is somewhere in the middle of the tube. Eventually, the closure spreads in a rostral and caudal direction until the entire tube is closed in.
