9. General Organisation of the Nervous System The Nervous System Central Nervous System Peripheral Nervous System Brain Spinal Cord Somatic Autonomic Sensory Motor Parasympathetic Sympathetic
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14. Major Divisions of the Nervous System { sensory motor autonomic nervous system { somatic nervous system { somatic nervous system { brain spinal cord { afferent nerves efferent nerves { parasympathetic nervous system sympathetic nervous system peripheral nervous system (PNS) nervous system central nervous system (CNS)
32. GLIAL CELLS OF THE CNS Ependymal Cells: Epithelial Cells Create Selectively Permeable Barrier Between Compartments Of the Brain
33. GLIAL CELLS OF THE CNS Oligodendrocytes: Support and Insulate axons By creating myelin In CNS, one Oligodentrocyte Forms myelin Around portions of Several Axons
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49. Ionic Concentration Gradients Cell Membrane in resting state K+ Na+ Cl- K+ A- Outside of Cell Inside of Cell Na + Cl- 0 mV
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51. The Resting Potential: Ionic Gradients & a Semi-Permeable Membrane Cell Membrane at rest Na+ Cl- K+ Na+ Cl- K+ A- Outside of Cell Inside of Cell Potassium (K+) can pass through open channels to equilibrate its concentration Sodium and Chlorine cannot pass through Result - inside is negative relative to outside - 70 mV
152. 2 lateral ventricles, one in each cerebral Hemisphere; no direct connection between The 2, but both open into the third ventricle of The diencephalon Midbrain has a slender canal known as the cerebral Aqueduct which connects the third ventricle with the Fourth ventricle of the pons and superior portion Of the medulla oblongata
153. Within the medulla oblongata the fourth ventricle Narrows and joins the central canal of the spinal cord
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156. CNS - Flow of CSF in CNS 1) Choroid Plexus makes CSF in Lateral Ventricle 2) CSF moves around fornix 3) Joins fluids from choroid plexus in 3rd Ventricle 4) Down cerebral aqueduct 5) Joins 4th Ventricle fluids from choroid plexus 6) Leaves aperatures or goes down central canal in spine 7) Circulates in arachnoid 8) Reabsorbed into blood of dural sinus by arachnoid villi