Spinal_Cord - SPINAL CORD SPINAL CORD ANATOMY A cylinder of...

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SPINAL CORD
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SPINAL CORD ANATOMY A cylinder of nerve tissue within the vertebral canal 31 pairs of spinal nerves arise from the cord Ventral rami of the spinal nerves branch & anastomose (merge) repeatedly to form 5 nerve plexuses
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Cross-Sectional Anatomy of the Spinal Cord Central area consists of gray matter shaped like a butterfly and surrounded by white matter in 3 columns Gray matter = neuron cell bodies with little myelin White matter = myelinated axons
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Spinal Tracts Decussation means that the fibers cross sides Contralateral - origin and destination are on opposite sides Ipsilateral means origin and destination are on same side
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SPINAL CORD FUNCTIONS Process reflex actions Nerve impluse integration Communication with brain via sensory & motor tracts
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MENINGES (sing. meninx) 3 fibrous meninges enclose brain & spinal cord Dura mater - tough -outermost Arachnoid - avascular - has collagen fibers Pia mater - thin - innermost
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Meninges of Spinal Cord
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Spinal_Cord - SPINAL CORD SPINAL CORD ANATOMY A cylinder of...

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