KINESIOL 2E03 Lecture Notes - Lecture 6: External Obturator Muscle, Obturator Nerve, Rectus Femoris Muscle

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Cord branches off as it descends down the vertebral column as spinal nerves break off. Each spinal nerve joins together with other spinal nerves through a variety of plexi to form peripheral nerves (femoral, obturator, sciatic) Every muscle belongs to a compartment and generally each compartment has its own nerve. Spinal nerves leave vertebral column via intervertebral foramen: one on each side of the vertebra. L1 nerve root is going to exit between l1 and l2; l2 nerve exits in the space between l2 and l3. Smaller holes in sacrum that allow (sacral foramena) sacral nerves to exit (s1-s3 are significant) As a nerve passes by a structure, it usually innervates it. Femoral nerve tracks down through front of hip innervates hip flexors. L2-s3 most significant for muscles covered so far. Nerve in l2,3,4,5,s1,2,3 high spectrum of nerves, innervates higher structures. Lower spectrum of nerves innervate lower structures of body.

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