ANAT 2626 Meninges and Cerebral Spinal Fluid

ANAT 2626 Meninges and Cerebral Spinal Fluid - Meninges...

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Meninges • Dura Mater • Arachnoid Membrane • Pia Mater • There are differences between the meninges in  the skull and those in the vertebral canal
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Cranial Dura • Periosteal layer – Rich blood supply • Meningeal layer – No vascular supply • Potential space • Innervated by the trgeminal nerve and C1-C3
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Folds of the meningeal layer • Falx cerebri • Tentorium cerebelli • Falx cerebelli
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Cranial Arachnoid • Space between dura and arachnoid = subdural  space • Arachnoid trabeculae suspends the brain in the  CSF • Arachnoid cisterns
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Arachnoid Granulations • CSF passes through to the sinuses
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Cranial Pia • Follows the contours of the brain.
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Spinal Dura • One layer • Epidural fat and a plexus of veins separates it  from the vertebral periosteum • Ends at S2 • Coccygeal ligament anchors it to periosteum  of cx1,cx2
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Spinal Arachnoid • Potential subdural space • Trabeculae suspends the spinal cord • Lumbar cistern L2-S2
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ANAT 2626 Meninges and Cerebral Spinal Fluid - Meninges...

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