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Unformatted text preview: 2-4-08 anatomy notes1.Organ Systems2.Nervous Systema.Central Nervous Systemi.Spinal Cord1.Gross Structurea.Location and Lengthi.From foramen magnumL1 and L2 vertebraii.Ends before it reaches the sacrumiii.In vertebral canal (spinal canal)b.Meningesi.Meningeal Dura Mater-outer layer1.Layer of white fibrous connective tissuea.Toughii.Arachnoid-middle layer1.More delicateiii.Pia Mater-innermost layerc.Terminal Structuresi.Conus Medullaris-cone shape1.Absolute end to spinal cordii.Cauda Equina-last 9 pairs of spinal nerves1.Emerge from conus medullaris and some extend down into:a.Vertebral Canalb.Others continue beyond vertebral canal and go into sacral canaliii.Filum Terminale-solid cord of connective tissue made up of pia mater1.Function: connects conus to coccyx which stabilized lower end of spinal cord to keep it in place2.Cross-Sectional Structurea.Gray-Matter: un-myelinated (axons and dendrites) nerve fibers and cell bodiesi.Gray matter in center of spinal cordii.Has an h-shape to it...
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