Experimental Study of the Eustachian Tube Function with Regard to its Related Muscles

Honjo, Iwao; Okazaki, Nobuhiro; Kumazawa, Tadami

doi:10.3109/00016487909126391

Cited by 93 publications

(21 citation statements)

References 6 publications

(5 reference statements)

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“…Tensor and levator veli palatini muscles have been found to be active more or less simultaneously in swallowing [3,7], which supports the conventional interpretation that Eustachian tube ventilation occurs in conjunction with velar closure. There is not strict synchrony in the action of these two muscles in swallowing, however, Honjo et al [3] found that levator veli palatini action sometimes preceded tensor yell palatini action. There is information on the sequence of muscular action in the pharyngeal phase of swallowing [8][9][10][11][12][13][14], but Eustachian tube opening has not been considered in that context.…”

supporting

confidence: 66%

Velar activity and timing of eustachian tube function in swallowing

Hamlet

Momiyama

1992

Dysphagia

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Velar motion for dry and liquid swallows was investigated. as well as velar activity in speech, based on X-ray microbeam pellet tracking data. Electromyographic recordings for tensor and levator veli palatini were obtained simultaneously. Velar pellet trajectories for swallowing were more complex than for speech, since there was a high-velocity anterior component in swallowing. For some swallows this anterior component was integrated with velar elevation (especially in liquid swallows), but in other cases initial velar elevation occurred considerably earlier (chiefly in dry swallows). The burst of tensor and levator veli palatini activity characteristic of swallowing was associated with the anterior component of velar pellet motion, but not consistently with velar elevation per se. The conventional view on timing of tensor veli palatini contraction in a swallow, which governs Eustachian tube opening, is that this is associated with velar closure. The X-ray microbeam data suggest rather that Eustachian tube ventilation is more closely associated in time to the onset of pharyngeal peristalsis, which may or may not coincide with initial velar elevation.

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supporting

confidence: 66%

Velar activity and timing of eustachian tube function in swallowing

Hamlet

Momiyama

1992

Dysphagia

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“…Specifically, insertion of the tensor veli palatini muscle (TVPM), which has been shown to be the muscle that dilates the tubal lumen, [7][8][9] was studied.…”

Section: Introductionmentioning

confidence: 99%

Insertion of the Tensor Veli Palatini Muscle into the Eustachian Tube Cartilage in Cleft Palate Cases

Matsune¹,

Sando²,

Takahashi³

1991

Ann Otol Rhinol Laryngol

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Differences in insertion of the tensor veli palatini muscle (TVPM) into the lateral lamina of the eustachian tube (ET) cartilage between cleft palate (CP) cases and controls were investigated histologically. Thirty temporal bones with entire ETs were studied: 10 from individuals with CP and 20 controls. The ratio of the length of the ET cartilage with insertion of the TVPM to its total length from the nasopharyngeal end to near the tubal isthmus was calculated in all 30 cases. In all 20 controls, but in only 6 of 10 CP cases, the TVPM inserted into the lateral lamina of the ET cartilage at its tip portion (chi 2 test, p less than .025). The ratio was significantly smaller in CP cases (0.178 +/- 0.172) than in controls (0.419 +/- 0.120) (t = 4.305, p less than .001). We believe that abnormal insertion of the TVPM into the ET cartilage is one of the causes of the functional obstruction of the ET that contributes to the frequent bouts of otitis media experienced by those with cleft palate.

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“…The underlying mechanism responsible for tubal opening, which takes place during yawning and swallowing, still requires clarification. Although in earlier literature tubal dilation was solely ascribed to tensor veli palatini muscle contraction [22, 52], most researchers consider it to be a result from a synergistic action between the tensor veli palatini and levator veli palatini muscle [17, 24, 43, 45, 46, 53]. The tensor veli palatini muscle action is assumed to be an isotonic contraction resulting in a direct increase of the lumen and a downwards traction on the lateral cartilage producing a rotational force on the medial cartilage [45].…”

Section: Discussionmentioning

confidence: 99%

The role of the tensor veli palatini muscle in the development of cleft palate-associated middle ear problems

et al. 2016

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ObjectiveOtitis media with effusion is common in infants with an unrepaired cleft palate. Although its prevalence is reduced after cleft surgery, many children continue to suffer from middle ear problems during childhood. While the tensor veli palatini muscle is thought to be involved in middle ear ventilation, evidence about its exact anatomy, function, and role in cleft palate surgery is limited.This study aimed to perform a thorough review of the literature on (1) the role of the tensor veli palatini muscle in the Eustachian tube opening and middle ear ventilation, (2) anatomical anomalies in cleft palate infants related to middle ear disease, and (3) their implications for surgical techniques used in cleft palate repair.Materials and methodsA literature search on the MEDLINE database was performed using a combination of the keywords “tensor veli palatini muscle,” “Eustachian tube,” “otitis media with effusion,” and “cleft palate.”ResultsSeveral studies confirm the important role of the tensor veli palatini muscle in the Eustachian tube opening mechanism. Maintaining the integrity of the tensor veli palatini muscle during cleft palate surgery seems to improve long-term otological outcome. However, anatomical variations in cleft palate children may alter the effect of the tensor veli palatini muscle on the Eustachian tube’s dilatation mechanism.ConclusionMore research is warranted to clarify the role of the tensor veli palatini muscle in cleft palate-associated Eustachian tube dysfunction and development of middle ear problems.Clinical relevanceOptimized surgical management of cleft palate could potentially reduce associated middle ear problems.

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Experimental Study of the Eustachian Tube Function with Regard to its Related Muscles

Cited by 93 publications

References 6 publications

Velar activity and timing of eustachian tube function in swallowing

Velar activity and timing of eustachian tube function in swallowing

Insertion of the Tensor Veli Palatini Muscle into the Eustachian Tube Cartilage in Cleft Palate Cases

The role of the tensor veli palatini muscle in the development of cleft palate-associated middle ear problems

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