Sphenomandibularis

Sphenomandibularis is a muscle that is considered by some anatomists to be a part of the temporalis. It is a thin, ribbon-like muscle that originates from the sphenoid and inserts into the mandible.

Etymology

The term "sphenomandibularis" is derived from the Greek word "sphen", meaning wedge, and the Latin word "mandibula", meaning jawbone. This name is indicative of the muscle's origin and insertion points.

Anatomy

The sphenomandibularis originates from the sphenoid near the foramen spinosum. It then descends downwards and laterally to insert into the medial surface of the mandible, near the mandibular foramen.

Function

The sphenomandibularis assists in the elevation and retraction of the mandible, aiding in actions such as chewing and speaking. It works in conjunction with other muscles of mastication, including the masseter, the temporalis, and the medial pterygoid.

Clinical Significance

Due to its location and function, the sphenomandibularis may be involved in conditions affecting the temporomandibular joint (TMJ), such as TMJ dysfunction or trismus.

See Also

• Temporalis muscle
• Mandible
• Sphenoid bone
• Foramen spinosum
• Mandibular foramen
• Masseter muscle
• Temporal muscle
• Medial pterygoid muscle
• Temporomandibular joint dysfunction
• Trismus