~BN02 Organization of NS.ppt
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~BN02 Organization of NS.ppt

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    ~BN02 Organization of NS.ppt ~BN02 Organization of NS.ppt Presentation Transcript

    • Organization of the Nervous System Lecture 2
    • The Central Nervous System
      • CNS
        • Brain
        • Spinal cord ~
    • Peripheral Nervous System
      • Somatic Nervous System - SNS
        • Sensory & Motor
      • Autonomic Nervous System - ANS
        • Sympathetic Division
        • Parasympathetic Division
      • Cranial Nerves - 12 Pair
      • Spinal Nerves - 31 Pair ~
    • Divisions of the Brain
      • Different schemes
        • Forebrain, midbrain, hindbrain
        • 5 major subdivisions
      • Forebrain
        • 1. Telencephalon
        • 2. Diencephalon
      • Midbrain -
        • 3. Mesencephalon
      • Hindbrain
        • 4. Metencephalon
        • 5. Myelencephalon ~
      • Dorsal - toward the back
      • Ventral - toward the stomach
      • Anterior & Posterior
      • Rostral & Caudal ~
      Terminology
    • In reference to the BRAIN Dorsal Ventral Anterior Posterior Rostral Caudal Inferior Superior
    • Brainstem & spinal cord Ventral Dorsal Rostral Caudal Anterior Posterior Superior Inferior
    • Neural Axis
    • Terminology
      • Medial - toward the midline
      • Lateral - away from the midline
      • Ipsilateral - same side
      • Contralateral - opposite side
      • Decussate - crossover ~
    • Terminology
      • Afferent - toward
        • Sensory
      • Efferent - away from
        • Motor ~
      • Coronal or frontal
        • cross-section - salami
      • Sagittal - side view
        • hot-dog bun
      • Horizontal
        • top view ~
      Planes
    • Coronal Section
    • Horizontal Section
    • Mid-sagittal Section
    • Telencephalon
      • Cortical areas
      • Fiber systems
      • Landmarks
        • Fissures /Sulci
        • Lobes
        • Gyri ~
    • Superior surface Longitudinal Fissure (sulcus)
    • Central Lateral
    • Frontal Parietal Occipital Temporal
    • M1 S1 A1 Gyri Superior temporal gyrus Postcentral gyrus Precentral gyrus
    • The Meninges
      • Tough connective tissue
      • Dura mater - tough outer layer
      • Arachnoid membrane - soft middle layer
      • Pia mater - soft inner layer, next to brain ~
    • Subarachnoid space
      • Gap between arachnoid membrane and pia mater
      • Filled with CSF
      • Brain floats in CSF ~
      • Dura mater
      • Arachnoid membrane
      • Subarachnoid space CSF
      • Pia mater
      The Meninges Brain
    • Ventricular System
      • 4 interconnected ventricles
        • chambers
      • Cerebral Spinal Fluid (CSF)
        • manufactured in choroid plexus
        • 125 ml, t 1/2 = 3 hrs
      • Hydrocephalus
        • blockage of CSF flow ~
    • Ventricular System L V L V 3 rd Lateral Ventricles Third Ventricle Fourth Ventricle 4 th Cerebral Aqueduct Central Canal