The human lateral pterygoid muscle: A review of some experimental aspects and possible clinical relevance

Murray, G. M.; Phanachet, Intira; Uchida, Shunya; Whittle, Terry

doi:10.1111/j.1834-7819.2004.tb00042.x

Cited by 71 publications

(60 citation statements)

References 28 publications

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“…Se considera que el músculo pterigoideo externo no es un músculo único, se trata de dos músculos distintos con función íntimamente relacionada 1 La anatomía de la ATM ha sido objeto de debate no solo por su papel en la etiología de la disfunción de la ATM, sino también por el hecho de que el haz superior del pterigoideo externo (Pterigoideo Lateral) se encuentra insertado al disco o al cóndilo de la mandíbula y contribuye al desplazamiento del disco y al dolor articular. 3,4,5,6 Material y método Esta investigación es de tipo descriptivo, transversal y exploratorio. El estudio se realizó en preparados anatómicos de 8 cadáveres con edad promedio de 25 a 60 años.…”

Section: Discussionunclassified

Análisis histológico de la inserción del fascículo superior del músculo pterigoideo externo al disco articular

Menacho

Rodríguez

Gastelú

et al. 2014

Odontol. sanmarquina

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15(1): 24-Análisis histológico de la inserción del fascículo superior del músculo pterigoideo externo al disco articularHistological analysis of the insertion of the superior lateral pterigoid muscle fascicle at articular disk ResumenLa inserción del fascículo superior del músculo pterigoideo externo (Pterigoideo Lateral) en el disco articular se presenta a partir del tercio medio de la región central de este y contribuye al desplazamiento del disco y su alteración contribuiría al desplazamiento discal. Sobre la inserción existen diferencias de opinión; unos consideran que solo una pequeña porción de fibras se inserta en la parte anterior de la cápsula y por ende directa e indirectamente al disco; otros investigadores señalan que se encuentra directamente insertado al disco y al cóndilo o solo en el borde anterior de la cápsula y el disco. El objetivo del estudio fue realizar un análisis histológico de la inserción de este músculo para diferenciar el tipo de fibras que llegan al disco articular (proporción de fibras colágenas y fibras musculares) y determinar el tipo de unión entre el músculo y el disco articular. La muestra de este estudio de tipo transversal y exploratorio estuvo constituido por diesiséis preparados anatómicos de articulaciones temporomandibulares, procesándose para su lectura histológica, con colorantes hematoxilina y eosina, Van Guiesson y Mallory, habiéndose encontrado que la mayor proporción de fibras que llegan a insertarse en el disco articular son colágenas y el tipo de unión entre el musculo y el disco articular es en forma intercalada en forma longitudinal. Palabras clave: anatomía, histología, músculos pterigoideos, articulación temporomandibular, hematoxilina, eosina AbstractThe inclusion of the fascicle higher external pterygoid muscle (Lateral Pterigoid) disk articulate occurs from the middle third of the central region and contributes to the displacement of the disc and its alteration help discal displacement. On the insertion, there are differences of opinion; some consider that only a small portion of fiber is inserted into the anterior capsule and thus directly and indirectly to the disk; other researchers point out that it is directly inserted the disk and the condyle or only on the anterior edge of the capsule and the disc. The objective of the study was a histological analysis of the insertion of this muscle to differentiate the type of fibres that reach the disk articulate (proportion of collagen fibers and muscle fibers) and determine the type of union between the muscle and the disc articulate. The sample of this study of transverse and exploratory type, was constituted by prepared diesiseis anatomical joint, temporomandibular, proceding for his histological reading with stains Hematoxylin and Eosin, Van Guiesson and Mallory, having found that the largest proportion of fibers reaching insert disk articulate are collagen and type of Union between the muscle and the disc articulate is sandwiched in a longitudinal way. Keywords: anatomy, histology, pterygoid muscles, tempor...

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Section: Discussionunclassified

Análisis histológico de la inserción del fascículo superior del músculo pterigoideo externo al disco articular

Menacho

Rodríguez

Gastelú

et al. 2014

Odontol. sanmarquina

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“…4 It is believed that this disorder may stem from LPM dysfunction or from poor co-ordination between the two heads. 1,6 However, there is currently no compelling scientific evidence that LPMs of TMD patients are functionally disturbed. 1 The SH of the LPM has been the focus of numerous studies in a bid to explain the problems associated with the TMJ and anterior displacement of the disc.…”

Section: Discussionmentioning

confidence: 99%

“…1,6 However, there is currently no compelling scientific evidence that LPMs of TMD patients are functionally disturbed. 1 The SH of the LPM has been the focus of numerous studies in a bid to explain the problems associated with the TMJ and anterior displacement of the disc. 3,6 Although electromyographic studies have …”

Section: Discussionmentioning

confidence: 99%

“…1 The lateral pterygoid muscle (LPM) is directly attached to the temporomandibular joint (TMJ), and is one of the key muscles in the physiology of mastication, participating in opening, closing, lateral and protrusive mandibular movements. 2 The LPM consists of two parts, the superior head (SH) and inferior head (IH).…”

Section: Introductionmentioning

confidence: 99%

“…1 Moreover, the role of LPM in normal functioning remains controversial. 1 Magnetic resonance (MR) imaging is considered the gold standard for evaluating alterations in the TMJ and masticatory muscles. The technique is able to provide morphological and positional information of the articular disc through high resolution images of soft tissue without exposing patients to radiation.…”

Section: Introductionmentioning

confidence: 99%

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Dimensional changes in lateral pterygoid muscles and disc position during mandibular movement using magnetic resonance imaging

et al. 2014

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| The lateral pterygoid muscle (LPM) has been the focus of numerous studies attempting to elucidate its possible role in temporomandibular disorders (TMDs). Disc displacement is widely accepted as a fi nding characteristic of this clinical condition. However, few studies have investigated the association between disc position and morphological alterations of the LPM. Objectives: to investigate the relationship between articular disc position and area measurements of the superior head (SH) and inferior head (IH) of the LPM using magnetic resonance (MR) imaging. Methods: The sample comprised 148 temporomandibular joints (TMJs) of 74 patients with complaints of pain and/or dysfunction in the TMJ area. Sagittal plane images were used for assessments of disc position and for tracings. Tracings of the areas of the heads were performed under 4 mandibular positions (at rest, and openings of 10 mm, 20 mm, and 30 mm) with the aid of image processing software. Data acquired was subjected to statistical analysis. Results: Statistical tests revealed changes in LPM head areas during mandibular opening movement, showing a reduction in total IH area and more heterogeneous changes in SH area. Relevance: The IH mean area was reduced in the positions assessed and showed no correlation with disc displacement. For the SH, reduced mean area was associated with anterior disc displacements without reduction, while increased mean areas were correlated with anterior disc displacement with reduction.descrIPtors | Magnetic Resonance Imaging; Temporomandibular Joint; Pterygoid Muscles. resuMo | Avaliação por ressonância magnética da alteração dimensional do músculo pterigóideo e da posição do disco articular no movimento mandibular • O músculo pterigóideo lateral (MPL) tem sido o foco de inúmeros estudos que tentam elucidar o seu possível papel na disfunção temporomandibular, condição na qual o deslocamento do disco é amplamente aceito como um possível aspecto clínico. No entanto, poucos estudos investigaram a associação entre a posição do disco e alterações morfológicas do MPL. Objetivos: investigar a relação entre a posição do disco articular e a área da porção superior e da porção inferior da músculo pterigóideo lateral usando ressonância magnética. Métodos: A amostra foi composta por 148 articulações temporomandibulares de 74 pacientes com queixa de dor e/ou disfunção articular. Imagens em plano sagital foram utilizadas para a avaliação da posição do disco e para traçados. Traçados das áreas do músculo foram realizados em 4 posições mandibulares (em repouso, e em aberturas de 10 mm, 20 mm e 30 mm) com a ajuda de software de processamento de imagem. Os dados adquiridos foram submetidos à análise estatística. Resultados: Os testes estatísticos revelaram mudanças nas áreas superior e inferior do músculo pterigóideo lateral durante o movimento de abertura mandibular, mostrando uma redução na área total e mudanças mais heterogêneos na área superior. Relevância: Observou-se que a área média da porção inferior muscular estava reduzida...

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Musculus pterygoideus proprius: A meta‐analysis

Mandal,

Montalbano,

Natsis

et al. 2023

Clinical Anatomy

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The pterygoideus proprius muscle can be found incidentally in the infratemporal fossa, where it is spatially associated with the muscles of mastication, the maxillary artery, and the trigeminal nerve and its branches. Anatomists have described the muscle in various ways over the past 160 years, chiefly as a musculotendinous structure that originates from the infratemporal crest of the sphenoid bone and inserts into the lateral pterygoid plate and the lateral pterygoid muscle. It is present in non‐human primates, albeit rarely, with similar anatomical findings. Embryologically, the pterygoideus proprius is thought to have developed from the first pharyngeal arch mesenchyme along with other muscles of mastication. Its close association with the maxillary artery and trigeminal nerve suggests possible clinical significance in trigeminal neuralgia and temporomandibular joint disorders. The literature was reviewed systematically to detail the historical background of research on the pterygoideus proprius muscle and explain its morphology, prevalence, embryology, and potential clinical significance. Despite its rarity, we propose that it is important to recognize its presence when the infratemporal fossa is approached.

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The human lateral pterygoid muscle: A review of some experimental aspects and possible clinical relevance

Abstract: The clinical notion that some disturbance to the activity of the lateral pterygoid muscle plays a role in the aetiology of temporomandibular disorders

Cited by 71 publications

References 28 publications

Análisis histológico de la inserción del fascículo superior del músculo pterigoideo externo al disco articular

Análisis histológico de la inserción del fascículo superior del músculo pterigoideo externo al disco articular

Dimensional changes in lateral pterygoid muscles and disc position during mandibular movement using magnetic resonance imaging

Musculus pterygoideus proprius: A meta‐analysis

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