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The activity has an image with defined hotspot areas. The hotspot areas in the image are labeled as:

LATERAL PECTORAL NERVE (C5, C6, C7), pierces clavipectoral fascia, (TLC)(thoracoacromial trunk, lateral pectoral nerve, and cephalic vein) -- innervates the pectoralis major along with the medial pectoral nerve
MUSCULOCUTANEOUS NERVE (C5, C6, C7)--a large terminal branch of the lateral cord, pierces the coracobrachialis muscle, innervates it along with the biceps and brachialis muscles, ends as lateral antebrachial cutaneous nerve of forearm.