musculus sphincter pupillae

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Related to Sphincter pupillae: Dilator pupillae
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.musculus sphincter pupillae - a ring of smooth muscle surrounding the iris
eye, oculus, optic - the organ of sight
anatomical sphincter, sphincter, sphincter muscle - a ring of muscle that contracts to close an opening
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References in periodicals archive ?
It exists in complex with multiple independent subnuclei, controlling the superior, inferior, and medial rectus muscle, inferior oblique muscle, levator palpebrae superioris muscle, and sphincter pupillae, respectively.
* Abnormalities in the (efferent) parasympathetic visual pathway; these can occur anywhere between the Edinger-Westphal nucleus and the sphincter pupillae
Changes in the pupillary dimensions are brought up by either an increment or a decrement in its diameter via the action of iridial smooth muscles, both longitudinal (dilator pupillae) and circular (sphincter pupillae) [7].

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