Deltoid Tendonitis

Overview Deltoid tendonitis is an injury to the deltoid muscle which covers the shoulder joint. The deltoid muscle is a large muscle which lifts the arm up sideways and can be divided into three parts: the front or the anterior …

Lateral Pterygoid

Lateral Pterygoid

Overview Lateral pterygoid (also called external pterygoid) is a deep muscle located in the face and is part of the muscle group that has a primary role in chewing (mastication). It is short, flat, thick and somewhat conical in shape. …