While out jogging on the roadside a passing car tire kicks up a sharp piece of m

Question

While out jogging on the roadside a passing car tire kicks up a sharp piece of metal that strikes the front of your elbow region. The metal slices deep into the cubital fossa just medial to the main ropelike tendon of the biceps. Blood begins spurting from your arm with every beat of the heart. Thinking quickly, you remove the metal, apply pressure to the area, and tourniquet the brachium above the elbow. You flag down a passing car and get a ride to the emergency room. On your ride to the hospital you notice a loss of sensation in your forearm and hand and definite muscle weakness. Emergency vascular surgery reconnects the severed artery, but there is also a severed nerve that does not respond well to its corrective surgery.

What nerve is cut? Clearly describe the muscular and cutaneous consequences of this injury. Describe the position of the hand as a result of this injury.

Explain how the answer is known, in anatomical terms.

Explanation / Answer

Median nerve lies close to the biceps brachii tendon.

So the injury lead to median nerve injury.i t causes

- inability to abduct and oppose this due to paralysis of thenar muscle leading to ape thumb deformity.

-sensory loss in thumb,index finger,long finger and radial aspect of ring finger

- weakness in forearm pronation and wrist and finger flexion

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