Origin
Clavicle, scapula.
Insertion
Humerus – into the deltoid tuberosity.
Blood supply
Posterior circumflex humeral artery.
Nerve supply
Axillary nerve.
Action
The deltoid muscles are responsible for flexion, medial rotation, and abduction of the arm at the shoulder level.
Disease/Injury
The deltoid can undergo frequent strain as a result of over-lifting or over-exertion.
Muscle Exercise
Push-ups and dumbbell press exercises help to strengthen the deltoid.
Interesting Facts
NA
