dilator muscle


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Related to dilator muscle: ciliary muscle

di·la·tor mus·cle

[TA]
a muscle that opens an orifice or dilates the lumen of an organ; it is the dilating or opening component of a pylorus (the other component is the sphincter muscle).
Synonym(s): musculus dilatator [TA]

di·la·tor mus·cle

(dī'lā-tŏr mŭs'ĕl) [TA]
A muscle that opens an orifice or dilates the lumen of an organ; it is the dilating or opening component of a pylorus (the other component is the sphincter muscle).
References in periodicals archive ?
Thompson and Mensher (1) found that phenylephrine was more useful than adrenaline when testing supersensitivity of the iris dilator muscle, but they mostly used a 10% solution that causes extensive mydriasis even in a normal pupil.
Patients with OSA have increased pharyngeal dilator muscle activity (as a percentage of maximum) versus matched controls (59) that has been interpreted as evidence for neuromuscular protective compensatory reflexes in response to anatomical compromise in OSA.
Multiple factors can influence output from the hypoglossal motor nucleus to the major upper airway dilator muscle (the genioglossus) (70-76).
2] and negative pressure to accumulate sufficiently to augment dilator muscle activity yielding improvements in pharyngeal patency.
Following arousal from sleep, augmented pharyngeal dilator muscle activity and a robust ventilatory response to arousal generally occur (Fig.
Other potentially important pathways in OSA pathogenesis such as airway dilator muscle tone and responsiveness, upper airway neural reflexes, and arousal threshold may also have genetic underpinnings; however, no studies have yet been performed to assess the familial basis for these traits directly.
Reflex arcs involving these upper airway dilator muscles are integrated with the central mechanisms that control ventilation and breathing.
This activation increases the tone of the upper airway dilator muscles.