Question

1) If the musculocutaneous nerve is severed, is elbow flexion still possible? Why?

2) What motions of the elbow would be hindered if the ulnar nerve were severed?

3) Tennis elbow is caused from inflammation of the tendons on the lateral epicondyle. Describe what repetitive movements cause this condition and explain why tennis elbow is not actually an elbow injury.

4) If the median nerve is impinged at the elbow, what will be the resulting motor deficits? Is finger flexion still possible?

5) What motions in the wrist and hand would be hindered if the radial nerve was compressed above the elbow? How does this compare to a radial nerve compression within the forearm and why?

Answer 1

1. weak elbow flexion is possible, the muscle responsible for this action is brachioradialis, however biceps and brachialis would be paralysed.

2. none because ulnar does not innervate any important movers of the elbow.

3.Repetitive motion of the forearm muscle, which is attached to the outside of elbow cause tennis elbow. Tennis elbow is swelling of tendons that bend your wrist backwards away from your palm.

4. If median nerve is impinged there is loss of pronation, weakness in wrist flexion and loss of thumb moblity

median nerve is called eye of the hand, if it is impinged there is sensory loss in the thumbs, index fingeres, long fingers and radial aspect of ring finger. weakness in finger flexion

5.It can cause sharp or burning pain in your thumb and fingers, cause numbness you may find difficulty to extend or straighten your wrist and fingers, this is known as wrist drop.