lateral pterygoid muscle


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Related to lateral pterygoid muscle: medial pterygoid muscle

lat·er·al pter·y·goid mus·cle

(lat'ĕr-ăl ter'i-goyd mŭs'ĕl) [TA]
Masticatory muscle of infratemporal fossa; origin, inferior head from lateral lamina of pterygoid process; superior head from infratemporal crest and adjacent greater wing of the sphenoid; insertion, into pterygoid fovea of mandible and articular disc and capsule of temporomandibular joint; action, protrudes lower jaw to enable opening of mouth; unilateral contraction deviates chin laterally, enabling grinding motion for chewing; nerve supply, nerve to lateral pterygoid from mandibular division of trigeminal.
Synonym(s): external pterygoid muscle, musculus pterygoideus externus, musculus pterygoideus lateralis.

lateral pterygoid muscle

One of the mastication muscles. Origin: greater wing of sphenoid bone, lateral pterygoid plate. Insertion: pterygoid fovea of condyle of mandible. Nerve: trigeminal (CN V). Action: opens mouth, protrudes mandible.
Synonym: external pterygoid muscle See: arm for illus.
See also: muscle

lat·er·al pter·y·goid mus·cle

(lat'ĕr-ăl ter'i-goyd mŭs'ĕl) [TA]
Masticatory muscle of infratemporal fossa; origin, inferior head from lateral lamina of pterygoid process; superior head from infratemporal crest and adjacent greater wing of the sphenoid; insertion, into pterygoid fovea of mandible and articular disc and capsule of temporomandibular joint; action, protrudes lower jaw to enable opening of mouth; unilateral contraction deviates chin laterally, enabling grinding motion for chewing; nerve supply, nerve to lateral pterygoid from mandibular division of trigeminal.
Synonym(s): external pterygoid muscle, musculus pterygoideus externus, musculus pterygoideus lateralis.
References in periodicals archive ?
Moreover, the superficial variant of maxillary artery presents a lateral pathway respect to lateral pterygoid muscle, getting closer to infratemporal crest and sphenoidal tubercle.
The present findings suggest that the lateral pterygoid muscle, bilaterally, has the lowest pain threshold upon palpation among the masticatory muscles, followed by masseter and temporal muscles in women with TMD, according to the RDC/TMD evaluation.
Ozcakar, "Recognition of the lateral pterygoid muscle and plate during ultrasound-guided trigeminal nerve block," Journal of Clinical and Diagnostic Research, vol.
It was observed that the lateral pterygoid muscle had a dorsal (Fig.
Real function of superior head of lateral pterygoid muscle by magnetic resonance imaging.
The human lateral pterygoid muscle: A review of some experimental aspects ans possible clinical relevance.
Lateral pterygoid muscle (LPM) abnormalities--Recent work has noted the importance of the lateral pterygoid muscle.
During one-month follow-up, the tenderness on the left lateral pterygoid muscle was eliminated with no TMJ discomfort.
(4) During removal of the lesion at the site of the temporal muscle and lateral pterygoid muscle, a large amount of dark-red blood from various sites flowed profusely into the surgical cavity.
There was tenderness of the lateral pterygoid muscles bilaterally but mandibular gait5 was normal.
After removing the pterygoid venous plexus and lower fibers of the lateral pterygoid muscle, inferior alveolar neurovas-cular bundle was cleaned.
It is possible that this close relationship between de infratemporal spine and the pterygoid process may be caused by medial fibers of the superior fascicle from lateral pterygoid muscle.