BIO 11 Lecture Notes - Lecture 23: Parietal Lobe, Neural Tube, Skeletal Muscle
3 Sep 2020
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Document Summary
Central nervous system begins as as a hollow neural tube with a fluid filled internal cavity called the neurocoel. As development proceeds the passageway expands to form enlarged chambers called ventricles. Three areas in the cephalic portion of the neural tube expand rapidly primary brain ventricles. Prosencephalon forms the telencephalon and the diencephalon. The prosencephalon and rhombencephalon subdivide forming secondary brain vesicles. Most developed in humans, olfactory nerve, optic nerves, corpus callosum. Diencephalon forms the epithalamus, the thalamus, and the hypothalamus. The mesencephalon does not divide but does become thicker and the neurocoel. Rhombencephalon forms the metencephalon and myelencephalon becomes a narrow passageway similar to that of the spinal cord. The anterior part of metencephalon becomes the pons. The posterior part of metencephalon becomes the cerebellum. Brainstem continuation of spinal cord consists of medulla oblongata, pons, and. Cerebellum second largest part of the brain. Diencephalon gives rise to the thalamus and the hypothalamus.
