ACB 8120 Lecture Notes - Lecture 75: Medulla Oblongata, Optic Vesicle, Hindbrain
12 Apr 2020
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Neuroepithelial cells proliferate a lot ( million per minute) within the skull, Cervical flexure (between myelencephalon and spinal cord) Midbrain flexure (between di and mesencephalon) - push mesencephalon up. Basal regulation of body processes, site of cranial nerve nuclei. Summarize the events involved in formation of a primitive brain and spinal cord (neurulation) Notochord causes ectoderm to thicken (neural plate) and then invaginate (neural groove) and when the 2 ridges (neural folds) come together, a tube (neural tube) is made (neuroectoderm) that will form the brain and spinal cord. 5 kinds trunk , vagal, lumbosacral, cranial crest cells - cns, cardiac - limited. Anterior to aorta = prevertebral, other gangs. Describe the structure of a typical neuron, peripheral nerve and peripheral ganglia. Cell body, dendrites (sum up ipsp + epsp), axon (hillock starts ap) propogates. Multipolar = dendrites + axon = motor. Unipolar = 1 process splits into 2 processes (central and peripheral) = sensory.
