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Lecture 30 - Spinal cord Spinal cord gross anatomy...

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Spinal cord
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Spinal cord gross anatomy Enlargements: 1) Cervical C4-T1 Nerves that exit here supply the shoulder girdle and upper limbs 2) Lumbar T9-T12 Nerves that exit here supply the pelvis and lower limbs
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Spinal cord gross anatomy Conus medullaris: Around L2 Filum Terminale: Extension of pia mater that anchors the spinal cord to the coccyx Cauda Equina: Extension of nerves exiting from end of spinal cord
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Because the spinal cord proper ends at the level of L2, and the dura and arachnoid layers extend to S2, a cavity forms that can be used to withdraw CSF Spinal tap
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Spinal cord gross anatomy Distribution of spinal nerves
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Dura mater Arachnoid layer Pia mater Dura mater is not attached to the bony vertebral column – creates epidural space (anesthesia) Spinal meninges Posterior median sulcus Anterior median fissure CSF flows in subarachnoid space – same as cranial meninges
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Internal anatomy of spinal cord (Gray matter) Central Canal Posterior Horns Anterior Horn
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