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 ?
For superior and inferior lateral pterygoid muscles, majority of the dentists preferred using functional manipulation method while for medial pterygoid, most preferred a combination technique.
Interestingly it was observed that the muscle fibers belonging to the dorsal part of the lateral pterygoid muscle from the caudomedial part of joint and the muscle fibers belonging to masseter and temporal muscles from the cranial part of joint were all distributed inside the articular disc (Fig.
Real function of superior head of lateral pterygoid muscle by magnetic resonance imaging.
The anatomic relationship of the insertion of the superior lateral pterygoid muscle in the human temporomandibular joint of the human cadavers.
A possible etiology of the internal derangement of the temporomandibular joint based on the MRI observations of the lateral pterygoid muscle.
5) On drilling into the middle fossa, they noted profuse bleeding around the third vertebra, which was caused by the numerous veins in the pterygoid plexus around the superior head of the lateral pterygoid muscle.
There was tenderness of the lateral pterygoid muscles bilaterally but mandibular gait5 was normal.
Mv= Maxillary vein, Sta= Superior temporal artery, Lptm= Lateral pterygoid muscle,
By doing this, the blocks with the mandibular fossa, the articular disc, the mandible condyle, the articular capsule and posterior third of the lateral pterygoid muscle were obtained, with both the heads.
1992) The malleolar anterior ligament is an embryological remainder of the Meckel's cartilage and the disc-malleolar ligament is a remainder of the lateral pterygoid muscle.
Computed tomography (CT) was done which demonstrated calcified plaques in the left medial and lateral pterygoid muscles extending from the lateral pterygoid plate to their insertions into the ramus neck of the mandible respectively (Figure 3).