dilator muscle

(redirected from Iris dilator muscle)
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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 ?
5,6) Recent studies suggest that iris dilator muscle thickness is reduced in individuals with a history of tamsulosin use.
The pathophysiology of IFIS is not well understood, and current research is mostly focused on the direct effect of [alpha]1-adrenergic antagonists on the iris dilator muscle.
The ophthalmic manifestations of Homer's syndrome are caused by a loss of input to the sympathetically controlled Muller's muscle and iris dilator muscle.
1) The lack of response of the iris dilator muscle may be attributable to the fact that it is largely [[alpha].
hydroxyamphetamine) because of degeneration of the sympathetic terminals in the iris dilator muscle, whereas in fact the response to such agents has been shown to be normal [23, 24] in elderly subjects.