The sphenomandibular ligament is an extracapsular ligament of the temporomandibular joint. It is attached superiorly to the spine of the sphenoid bone and expands inferiorly to attach to the lingula of the mandible and the posterior margin of the mandibular foramen (Fig. 8.146).
The medial pterygoid muscle is quadrangular in shape and has deep and superficial heads (Fig. 8.146):