NEUROSCI 101 Study Guide - Midterm Guide: Sonic Hedgehog, Radial Glial Cell, Neurogenesis
17 Feb 2016
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Top of brain: cranial, superior, dorsal . Near brain stem/ spinal cord: caudal . Dorsal = toward the back of brain but top of spinal chord. Ventral = underneath, part of spinal chord toward the chest. Coronal loaf of bread, vertical slices from ear to ear. Sagittal hot dog, vertical slices down the midline through nose. Brain development: neurogenesis, migration, differentiation, synaptogenesis, cell death, Synapse rearrangement: neurogenesis birth of cells. Born from precursors that form along the inside of the neural tube (ectoderm, lining of. Most neurogenesis happens before birth, but hippocampus creates new cells throughout ventricles) life: cell migration massive movement to right location. Follow paths laid by radial glia, organize into groups (nuclei/layers) that remain throughout life. Cerebral cortex: inner layer (near lateral ventricles) has oldest cells, outer layer has newer cells (migrate further away towards surface of the cortex: differentiation developing specific capabilities. New cells have capability to become different types of neurons.
