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

Latissimus dorsi muscle, innervated by the thoracodorsal nerve
Teres major muscle, innervated by the lower subscapular nerve
Long head of triceps muscle, innervated by the radial nerve
Teres minor muscle, innervated by the axillary nerve
Deltoid muscle, innervated by the axillary nerve
Infraspinatus muscle, innervated by the suprascapular nerve
Circumflex scapular artery in triangular space
Axillary nerve in the quadragular space
Posterior humeral circumflex artery in quadragular space
Radial nerve in triangular interval
Profunda brachii artery