A 29-year-old man comes to the office due to left-hand weakness. The patient has started his job as an electrician. He uses the screwdriver at work. Physical examination does not show any sensory deficits, but there is a loss of extension of fingers and thumb extension of the left hand. Triceps is found bilaterally to be normal. The nerve injury in this patient is most likely at which of the following levels?

Question

Quizplus · Accepted Answer

Eductional Objective: Subluxation of the radius, trauma and repetitive pronation or supination of the forearm may lead to radial nerve injury at the level of the supinator muscle. Injury at this level leads to weakness of finger or thumb extension, but it does not lead to wrist drop or sensory manifestations.

A 29-Year-Old Man Comes to the Office Due to Left-Hand