PHS 1200 Lecture Notes - Lecture 1: Dorsal Root Ganglion, Corticospinal Tract, Postcentral Gyrus
9 Feb 2017
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Document Summary
Components include the brain and spinal cord. Primary functions of the cns are: 1. Receive and process sensory information: appropriate responses of muscles and glands 3. Basic pattern of the cns (both the brain and spinal cord) is a central cavity , filled with csf, ependymal lining. They have both gray matter (cell bodies), external white matte (myelinated) tracts surrounds and cerebral hemispheres/cerebellum outer cortex (gray matter) Cheilded from periphery by tight junctions between cells of capillary endothemium (blood brain barrier) and between ependymal cells that line ventricles (csf-brain-barrier) Anterior circulation is supploud by the external carotid and internal carotid arteries, anterior/middle cerebral, posterior communicating branches. Posterior circulation is supplied by the vertebral artery. Circle of willis is connected at the base. Pathway: cerebral veins sinuses jugular vein heart. Cerebral cortex is the outermost , 6 layers of gray matter. Ridges (gyri), grooves (sulci), depper depressions (fissures: divide each hemisphere: frontal, patiertal, temporal, and occipital lobes.
