The deltoids wrap around the top of the shoulder from front to back & span the clavicle, the acromion, & lateral half of the scapula. This muscle group is divided into the anterior, middle, & posterior deltoids. Similarly to the gluteal muscles in the hip, the point of their attachment largely determines their function. The anterior deltoids assist with flexion & external rotation of the shoulder. The middle portion abducts, & the posterior deltoids assist with extension & external rotation.

Sustainable Mind and Positive Body Image
Sustainable Mind and Positive Body Image Feeling Safe in Our Bodies It is an extraordinarily complicated mission to feel safe in our bodies. Read that