dilatator pupillae
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 ]
Synonyms: radial muscle of iris, pupillary dilator muscle, dilator pupillae muscle, dilator pupillae, musculus dilatator pupillae, iris dilator muscle, dilator of pupil, dilator muscle of pupil
Term info
- FMA:49158
- MA:0001288
- EMAPA:35286
- BTO:0001371
- NCIT:C32463
- UMLS:C0229190 (ncithesaurus:Dilator_Pupillae_Muscle)
- Wikipedia:Iris_dilator_muscle
- SCTID:280890008
uberon_slim
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
http://upload.wikimedia.org/wikipedia/commons/2/2f/Gray878.png
musculus dilator pupillae, dilator pupillae muscle, pupillary muscle, iris dilator, pupil dilator muscle, pupillary dilator, radiating fibers, musculus dilatator pupillae, radial muscle, pupil dilator
uberon
UBERON:0001608
dilatator pupillae, Dilatator pupillae
Term relations
- iris smooth muscle
- anatomical structure
- develops from some neurectoderm
- has muscle insertion some iris
- has muscle origin some iris
- has muscle antagonist some sphincter pupillae