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Uberon Ontology

orbitalis muscle

Term ID
UBERON:0006318
Synonyms
  • musculus orbitalis
  • orbitalis
Definition
An orbitalis muscle is a rudimentary nonstriated muscle (smooth muscle) that crosses from the infraorbital groove and sphenomaxillary fissure and intimately united with the periosteum of the orbit. It is often called Muller's muscle. One characteristic of Horner's Syndrome is enophthalmos (retraction of the eyeball into the orbit due to paralysis of the orbitalis muscle that spans the inferior orbital fissure). Its function is eyeball protrusion. http://en.wikipedia.org/wiki/Orbitalis_muscle
References
Ontology
Uberon Ontology
Relationships
is part of
is a type of
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