Electromyography of the pharyngeal constrictors and levator palati in man

Basmajian, John V.; Dutta, Chitta R.

doi:10.1002/ar.1091390414

Cited by 58 publications

(20 citation statements)

References 3 publications

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“…Duration of velar closure during swallowing has been measured radiographically to be between 0.5 and 1.0 s [26,27]. Duration of levator activity during swallowing was found to be 300 ms in an older study [8], and our present data are in that range also. Thus, the duration of velar closure appears to be unaccountably long if levator veli palatini were the only muscle responsible.…”

Section: Discussionsupporting

confidence: 55%

“…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.…”

mentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 55%

mentioning

confidence: 99%

Velar activity and timing of eustachian tube function in swallowing

Hamlet

Momiyama

1992

Dysphagia

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“…Activity in the inferior constrictor begins when the activity in the leading complex has ceased [1]. During EMG studies, the duration of the activity in the pharyngeal constrictors has been shown to vary between 400-500 msec [1,14]. At the initiation of pharyngeal swallow any background elec- tric activity in the middle and inferior constrictor is abruptly inhibited at the onset of action in the leading complex.…”

Section: Discussionmentioning

confidence: 99%

Speed of peristalsis in pharyngeal constrictor musculature: Correlation to age

Borgström

Ekberg

1988

Dysphagia

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Abstract, In order to define the influence of age on pharyngeal constrictor peristalsis, four groups of individuals were examined with cineradiography (50 frames/s) during barium swallow. The speed varied between 6.3 and 21.3 cm/s (mean, 10.5). There was no significant difference between young nondysphagic volunteers and the three groups of dysphagic patients ages under 40, between 50 and 60, and over 75 years of age). However, the intrapersonal variation of peristaltic speed during three different swallows was small in young nondysphagic volunteers and large in dysphagic patients. The variation increased with age. Variation in speed is easy to register during cineradiography and should be considered as a criterion for definition of pharyngeal motor performance in dysphagic patients.

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“…Descriptive studies based on this technique consistently found that the nonvolitional component of swallowing was controlled by a CPG (Miller 1972;Suzuki, Tokuriki et al 1977;Kobara-Mates, Logemann et al 1995). In humans, most of the intramuscular EMG studies of the pharyngeal phase of swallowing focused on a single muscle or muscle pair (Basmajian and Dutta 1961;Perlman, Luschei et al 1989). Such studies can shed valuable light on the properties of the muscle of interest.…”

Section: From Bench To the Bedsidementioning

confidence: 97%