orbicularis oculi muscle

(redirected from musculus orbicularis oculi)

or·bi·cu·la·ris oc·u·li mus·cle

(ōr-bik'yū-lā'ris ok'yū-lī mŭs'ĕl)
Consists of three portions: orbital part, or external portion, which arises from frontal process of maxilla and nasal process of frontal bone, encircles aperture of orbit, and is inserted near origin; palpebral part, or internal portion, which arises from medial palpebral ligament, passes through each eyelid, and is inserted into lateral palpebral raphe; lacrimal part (tensor tarsi muscle, Duverney or Horner muscle), which arises from posterior lacrimal crest and passes across lacrimal sac to join palpebral portion; action, closes eye, wrinkles forehead vertically; nerve supply, facial.
Synonym(s): musculus orbicularis oculi [TA] .

orbicularis oculi muscle

Facial muscle. Origin: completely surrounds eye, attaches to medial palpebral ligament (and adjacent bones) and lacrimal crest (and adjacent bones). Insertion: medial palpebral raphe (after encircling orbit), lateral palpebral raphe, tarsi of eyelids. Nerve: facial (CN VII) Action: closes eyelids, lifts cheeks, compresses lacrimal sac.
See: face and headfor illus.
See also: muscle

orbicularis oculi muscle

see Table 13.1F.
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