DELTOIDEUS
\dɛltˈɔ͡ɪdɪəs], \dɛltˈɔɪdɪəs], \d_ɛ_l_t_ˈɔɪ_d_ɪ__ə_s]\
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Origin: (1) Outer third of clavicle; (2) Acromion process; (3) Spine of scapula. Insertion: Prominence on middle of outer side of shaft of humerus. Nerve: Circumflex. Action: Part 1 draws arm forward and raises it; Part 2 adducts and lifts arm; Part 3 draws arm backward and raises it.
By Alexander Duane
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