dilator

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Related to dilator muscles: dilator pupillae muscle, Dilator pupillæ muscle, Iris dilator muscle

dilator

[dī′lād·ər]
(physiology)
Any muscle, instrument, or drug causing dilation of an organ or part.
References in periodicals archive ?
Important components likely include pharyngeal anatomy (38,39), pharyngeal dilator muscle responsiveness to respiratory challenges during sleep (40-43), the arousal threshold (propensity to wake up from sleep) (44,45), the instability of the negative feedback control system regulating ventilation (loop gain) (46-48), and upper airway tethering via caudal traction from changes in end-expiratory lung volume (EELV) (49-52).
Imaging studies during wakefulness, however, are complicated to interpret since ongoing pharyngeal dilator muscle activity (greater in OSA than controls (59)) may lead to observed differences between groups based on non anatomical (i.
Scientists believe that impaired activation of the pharyngeal dilator muscles decreases their tone to the point that structures supported by these muscles are easily drawn into the airway during sleep in OSA sufferers.
OSA represents the most extreme degree of lack of compensation for increased upper airway resistance, and it is characterized by upper airway collapse uncompensated by dilator muscle action.
The dilator muscle moves away from the pupil like bicycle spokes.