Conditions of the Elbow Quiz

See Medial elbow tendinopathy. Option A is correct. The cubital tunnel is a narrow space on the inner side of the elbow, between the medial epicondyle (the bony bump on the inner side of the lower humerus) and the olecranon (the point of the elbow). The ulnar nerve runs through it, which is why a knock to this spot gives the familiar tingling of the 'funny bone'. Cubital tunnel syndrome is the condition caused by sustained pressure or stretch of the nerve here, for example from leaning on the elbow or from repeated elbow bending. Because the ulnar nerve supplies the skin of the little finger and the ulnar half of the ring finger, patients typically report tingling or numbness in those two fingers. The ulnar nerve also supplies most of the small muscles of the hand, so longer-standing compression can weaken finger spreading and grip. Tapping lightly over the nerve at the medial elbow (Tinel's sign) may reproduce the tingling. Cubital tunnel syndrome is the second most common compressive nerve problem of the upper limb, after carpal tunnel syndrome.

• Site: the cubital tunnel lies between the medial epicondyle and the olecranon.
• Nerve: the ulnar nerve runs through it.
• Symptoms: tingling or numbness in the little finger and the ulnar half of the ring finger.

Name the tunnel, then name the nerve that runs through it: carpal tunnel and median nerve, cubital tunnel and ulnar nerve.