[Role of the lateral pterygoid muscle in mandibular movements].
The two bundles, superior and inferior, of the lateral pterygoid muscle were studied by EMG and integrated EMG during various movements of the mandible in 36 children and 2 adults. At the same time, the EMG of other masticatory muscles was also recorded. The functional specialization of the two bundles is expressed by different levels of recruitment: In the inferior bundle (pterygo-condylian,) electrical activity is stronger in the movements of opening, antepulsion and controlaterality. In the superior bundle (spheno-meniscal), activity is stronger in the movements of occlusion and retraction. Thus the inferior bundle principally has a function of stabilization of the temporomandibular joint.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004576:Electromyography; D006801:Humans; D008334:Mandible / Q000502:physiology*; D008410:Masticatory Muscles / Q000502:physiology*; D009068:Movement; D011626:Pterygoid Muscles / Q000502:physiology*; D011999:Recruitment, Neurophysiological; D013704:Temporomandibular Joint / Q000502:physiology
La place du ptérygoïdien latéral dans les mouvements de la mandibule.