Styloid process(radius) Posterior Dorsum of hand Deltoid region, deltoid egion of arm canon Thumb Brachioradialis Index finger Posterior axillary fold - Middle finger Ring finger Medial Little finger dyle Latissimus dorsi Styloid process Triceps brachii Posterior region (ulna) of forearm Fig. 288 Arm; surface anatomy; right posterior aspect (15%) 表面解剖• 表面解剖