Mnemonic for Proximal attachment (origin) of deltoid muscle is : CLASP
CLASP stands for:
CL – Clavicle (anterior fibers of deltoid arise from the anterior border and superior surface of lateral third of clavicle)
A – Acromion (middle fibers of deltoid arise from the lateral border of acromion process of scapula)
SP – Spine of the scapula (posterior fibers of deltoid arise from the posterior border of spine of scapula)
Note : The fibers of the deltoid converge and is inserted into the deltoid tuberosity of humerus.