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sphincter pupillae

^ http://purl.obolibrary.org/obo/UBERON_0001607

A sphincter muscle that is part of the iris. [ http://en.wikipedia.org/wiki/Iris_sphincter_muscle ]

Synonyms: musculus sphincter pupillae, iris sphincter muscle, M. sphincter pupillae, sphincter muscle of pupil

Term info

database cross reference
Subsets

uberon_slim

UBPROP 0000008

WP says: It is found in vertebrates and some cephalopods; this class refers to the vertebrate structure, In humans, it functions to constrict the pupil in bright light or during accommodation. Its dimensions are about 0.75 mm wide by 0.15 mm thick. It is controlled by parasympathetic fibers that originate from the Edinger-Westphal nucleus, travel along the oculomotor nerve (CN III), synapse in the ciliary ganglion, and then enter the eye via the short ciliary nerves. Initially, all the myocytes are of the smooth muscle type, but much later in life, so that ultimately most cells are of the striated muscle type. [WP,unvetted]

UBPROP 0000009

constricts iris

depicted by

http://upload.wikimedia.org/wikipedia/commons/2/2f/Gray878.png

has related synonym

pupillary constrictor muscle, sphincter pupillae, constrictor pupillae, pupillary sphincter, sphincter pupillae muscle, pupillary sphincter muscle, m. sphincter pupillae, circular fibers, spincter pupillae, iris sphincter, iris constrictor, iris constrictor muscle

id

UBERON:0001607

prefLabel

Sphincter pupillae