Nerve to the lateral pterygoid muscle

Nerve to the Lateral Pterygoid Muscle

The nerve to the lateral pterygoid muscle is a branch of the mandibular nerve, which is the third branch of the trigeminal nerve. It is responsible for innervating the lateral pterygoid muscle, one of the muscles involved in the movement of the jaw.

Anatomy

The nerve to the lateral pterygoid muscle arises from the main trunk of the mandibular nerve within the infratemporal fossa. It usually originates from the anterior division of the mandibular nerve, although variations in its origin have been reported. After its origin, the nerve descends inferiorly and laterally, passing between the medial and lateral heads of the lateral pterygoid muscle.

Function

The lateral pterygoid muscle is primarily responsible for the protrusion and lateral movements of the mandible. It plays a crucial role in activities such as chewing, speaking, and swallowing. The nerve to the lateral pterygoid muscle provides the necessary innervation for the muscle to carry out these functions effectively.

Clinical Significance

Injury or dysfunction of the nerve to the lateral pterygoid muscle can lead to various clinical manifestations. One common condition associated with this nerve is temporomandibular joint disorder (TMJ disorder). TMJ disorder can cause pain, clicking or popping sounds, and limited movement of the jaw. Dysfunction of the lateral pterygoid muscle can contribute to the development of this disorder.

Additional Resources

For more information on the nerve to the lateral pterygoid muscle, refer to the following resources:

• Nerve to the Lateral Pterygoid Muscle - StatPearls
• Nerve Supply to the Lateral Pterygoid Muscle - Journal of Clinical and Diagnostic Research