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Iris dilator muscle

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Iris dilator muscle
Image:Gray878.png
Iris, front view. (Muscle visible but not labeled.)
Image:Gray883.png
The upper half of a sagittal section through the front of the eyeball. ("Radiating fibers" labeled near center.)
Latin musculus dilatator pupillae
Gray's subject #225 1013
Origin:
Insertion:
Blood:
Nerve:
Action: dilates pupil
Antagonist: iris sphincter muscle
Dorlands/Elsevier m_22/12548821

The iris dilator muscle (pupil dilator muscle, pupillary dilator, radial muscle of iris, radiating fibers), is a muscle of the eye. It is innervated by the sympathetic system.

[edit] Additional images

Sympathetic connections of the ciliary and superior cervical ganglia.

[edit] See also

[edit] External links

Muscles of the Head — Neck — Trunk — Upper limb — Lower limb— LIST OF ALL MUSCLES

scalp/eyelid: occipitofrontalis (occipitalis, frontalis) - orbicularis oculi - corrugator supercilii - depressor supercilii | (Gray's s105 - Gray's s106)

nose: procerus - nasalis - depressor septi nasi - dilatator naris posterior - dilatator naris anterior - levator labii superioris alaeque nasi | (Gray's s107)

mouth: levator labii superioris - levator anguli oris - zygomaticus (major, minor) - mentalis - depressor labii inferioris - depressor anguli oris - buccinator - orbicularis oris - risorius | (Gray's s108)

mastication: masseter - temporalis - pterygoid (lateral, medial) | (Gray's s109)

extraocular: levator palpebrae superioris - superior tarsal - rectus (superior, inferior, medial, lateral) - oblique (superior, inferior) | intraocular: ciliary - iris dilator - iris sphincter | (Gray's s227)

hearing: auricularis anterior - stapedius - tensor tympani | (Gray's s228-Gray's s232)

larynx: cricothyroid - posterior cricoarytenoid - lateral cricoarytenoid - arytenoid - thyroarytenoid | (Gray's s236)

tongue: extrinsic (genioglossus - hyoglossus - chondroglossus - styloglossus) intrinsic (superior longitudinal - inferior longitudinal - transversus - verticalis) | (Gray's s242)

palate: levator veli palatini - tensor veli palatini - musculus uvulae - palatoglossus - palatopharyngeus | (Gray's s243)

pharynx: pharyngeal constrictor (inferior, middle, superior) - stylopharyngeus - salpingopharyngeus | (Gray's s244)

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