A mechanism for passive mandibular depression.
Retention of a retromandibular space has necessitated developing a system of mandibular protrusion in hominid species. It is possible that mandibular protrusion can be effected by a single muscle-the lateral pterygoid-and the motion controlled by the excentrically placed mandibular suspensory ligaments. The elasticity of the ligaments produces an integrity maintenance force between the articular condyle and eminence which is normally of minimal size. Excessive craniofacial flexion, or the retention of a juvenile configuration of the mandible, could result in increasing this integrity maintenance force and cause crepitation and clicking. Ajustment of the ligaments could reduce these pathological manifestations.
D006801:Humans; D008023:Ligaments, Articular / Q000033:anatomy & histology / Q000503:physiopathology; D008334:Mandible / Q000033:anatomy & histology / Q000503:physiopathology*; D008954:Models, Biological; D009068:Movement; D013314:Stress, Mechanical; D013704:Temporomandibular Joint / Q000033:anatomy & histology / Q000503:physiopathology*; D013706:Temporomandibular Joint Dysfunction Syndrome / Q000503:physiopathology*