Musculocutaneous nerve is injured at the lateral cord of brachial plexus, positive clinical findings would be :

Musculocutaneous nerve supplies biceps and brachialis. It also gives sensory supply along the radial side of forearm. When it is damaged, it might show the following : Flexion at elbow weakened (Biceps & Brachialis). Supination of semiflexed elbow is affected (Biceps). Sensory loss on radial side of forearm.