01:377:303 Lecture Notes - Lecture 5: Dorsal Root Of Spinal Nerve, Spinal Stenosis, Neurotmesis

• School: Rutgers University
• Department: Exercise Science and Sport Studies
• Course: 01:377:303
• Professor: Sara Campbell

Document Summary

Lecture 5: biomechanics of peripheral nerves and spinal nerve roots. The spinal column ends at l2 and then turns into the cauda equina. Peripheral nerves have both a motor and sensory component. Anatomy and physiology of peripheral nerves: the peripheral nerve fibers structure and fx. Have both a sensory and motor function. Transmit impulses and are the connection to the cell body and the end organs. Nodes of ranvier, axons, myelin sheaths, schwann cells. Myelin sheath and nodes of ranvier help propagate impulse (compromised in ms) Peripheral nerve is highly vascularized because of the need of high oxygen. Need to be vascular because they need a lot of nutrients to fx properly. With tearing, compression, or swelling of the nerve oxygen supply is compromised which can cause less sensation or motor fx. Figure 5. 4: layers of ct surrounding the nerve. Endoneurium- inner layer; surrounds the nerve axon (sheath)