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SPINAL CORD

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  • SPINAL CORD

  • Spinal Nerves Dermatomes

  • GrossGross Spinal Cord

  • Gross Structure

    FGFC Dorsal Columns

    Dorsal horn

    FGFC

    Dorsal hornLateral Columns

    Intermediate hornhorn

    Ventral horn Ventral Columns

  • Where are the sensory and motor nuclei?nuclei?

    Alar plate – sensory

    •Basal plate – motor

  • Gross Structure

    Dorsal hornDorsal horn

    Intermediate hornhorn

    Ventral horn

  • Gray Matter & Nuclear Structure

  • Dorsal/Sensory Organization

  • Ventral/Motor Organization

    Input

    Motor neuronInterneuron

    Output

  • Spinal Cord Levels

  • Ventral Horn / Motor Organization

  • Ventral Horn / Motor OrganizationOrganization

  • Stretch Reflex

    Ia fromspindle

    ExtrafusalFiber,E t

    T E t

    Extensor Muscle

    To Flexor

    To Extensormuscle

    Intrafusal muscle To Flexor,

    antagonist musclemuscle

  • Cutaneous Reflex

  • Cutaneous Reflex

    PAIN RECEPTORS

    EXTENSOREXTENSOR

    FLEXOR FLEXOR

  • Renshaw Cell

    Ia fromspindlep

    Renshaw Cell

    Alpha-MotorAlpha MotorNeuron


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