Terminology Service for NFDI4Health
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dilatator pupillae

Go to external page http://purl.obolibrary.org/obo/UBERON_0001608

A smooth muscle of the eye, running radially in the iris that functions as a dilator. [WP,unvetted]. [ http://en.wikipedia.org/wiki/Iris_dilator_muscle ]

Term info

Label

dilatator pupillae

Synonyms
  • dilator muscle of pupil
  • dilator of pupil
  • dilator pupillae
  • dilator pupillae muscle
  • iris dilator muscle
  • musculus dilatator pupillae
  • pupillary dilator muscle
  • radial muscle of iris
database cross reference
Subsets

uberon_slim

latin term
musculus dilatator pupillae [ FMA : TA FMA : 49158 ]

depicted by

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

function notes

It is innervated by the sympathetic system, which acts by releasing noradrenaline, which acts on alpha1-receptors. Thus, when presented with a threatening stimuli that activates the fight-or-flight response, this innervation dilates the iris, thus temporarily letting more light reach the retina

has related synonym

musculus dilator pupillae, dilator pupillae muscle, pupillary muscle, iris dilator, pupil dilator muscle, pupillary dilator, radiating fibers, musculus dilatator pupillae, radial muscle, pupil dilator

id

UBERON:0001608