What is lateral pterygoid?

The lateral pterygoid is a muscle located in the jaw that plays a crucial role in the movement of the mandible (lower jaw). It is one of the muscles of mastication, primarily responsible for facilitating the forward and side-to-side movements of the jaw, which are essential for chewing. This muscle has two heads: the superior head, which stabilizes the jaw during clenching, and the inferior head, which helps in opening the mouth. Dysfunction or pain in the lateral pterygoid can lead to temporomandibular joint disorders (TMJ).