orbicularis oculi

orbicularis oculi

the muscular body of the eyelid, encircling the eye and comprising the palpebral, orbital, and lacrimal muscles. It arises from the nasal part of the frontal bone, the frontal process of the maxilla in front of the lacrimal groove, and the anterior surface of the medial palpebral ligament. The palpebral muscle functions to close the eyelid gently; the orbital muscle functions to close it more energetically, such as in winking. Also called orbicularis palpebrarum.Compare corrugator supercilii, levator palpebrae superioris.
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Muscles of the face: orbicularis oculi and orbicularis oris

orbicularis oculi

The flat, circular, SUBCUTANEOUS muscle that surrounds each eye and that, on contraction, causes the eye to ‘screw up’.
References in periodicals archive ?
Its aetiologies can be classified into those that relate to the paralysis of orbicularis oculi (paralytic lagophthalmos --see Table I) and those that cause retraction of the upper or lower lids (restrictive lagophthalmos--see Table 2, page 70).
The secretions drain through numerous ducts into superolateral conjunctival sac of the eye, from there it flows to the medial angle of the eye by the contraction of orbicularis oculi muscle.
Bilateral contraction of the orbicularis oculi muscles was also noted.
Muscle position is determined by the balance of the frontal muscle (elevator), the orbicularis oculi, depressor supercili, corrugator supercilli and proserus (depressor).
Reference jitter values for concentric needle electrodes in voluntarily activated extensor digitorum communis and orbicularis oculi muscles.
Nonsurgical techniques that help lift the brow include a combination of relaxation of the orbicularis oculi muscle with neurotoxins, in addition to the injection of hyaluronic acid fillers along the brow margin and upper third of the face.
In one famous 1993 experiment, researchers asked human subjects to smile forcibly for 20 seconds while tensing facial muscles, notably the muscles around the eyes called the orbicularis oculi (which create "crow's feet").
The temporal nerve provides motor innervation to the frontalis, corrugator, and lateral orbicularis oculi muscles.
KEY WORDS: Benign essential blepharospasm botulinum toxin facial dystonia orbicularis oculi.
Normal blinking of human eye increases IOP by 10mmHg and forceful contraction of the orbicularis oculi can increase IOP to Greater than 50mmHg.
On examination, the patch had reduced sensation and loss of hair and the right orbicularis oculi, muscle power was found to be weak.