MUSCLES-DELTOID & TERES MAJOR

SUMMARY

1. DELTOID - arises from the lateral 1/3 of the clavicle, acromion & inferior lip of the crest of the scapular spine. Inserted into the deltoid tuberosity of the humerus. Supplied by the axillary nerve. Main abductor of the arm but does everything except adduction. 

2. TERES MAJOR - arises from the inferior angle of the dorsum of the scapula. Inserted into the medial lip of the intertubercular groove. Supplied by the lower subscapular nerve (C5 + C6). Adducts & medially rotates the humerus. 

Image: Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918; Bartleby.com, 2000. www.bartleby.com/107/ [Accessed 18 Apr. 2020].

Reference(s)

R.M.H McMinn (1998). Last’s anatomy: regional and applied. Edinburgh: Churchill Livingstone.
Gray, H., Carter, H.V. and Davidson, G. (2017). Gray’s anatomy. London: Arcturus.