orbicularis


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orbicularis

(ɔːˌbɪkjʊˈlɑːrɪs)
n
(Anatomy) anatomy a muscle surrounding an opening
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.
Two stab incisions were made through skin and orbicularis to reach tarsal plate.
The orbicularis oculi, corrugator supercilii, platysma, mentalis, and buccinator are the most preferred muscles for injection (4).
The defect was approximately 3 mm in thickness involving the superficial orbicularis ori muscles.
The blink reflex, also known as the orbicularis oculi reflex test, may be indicative of lesions or dysfunctions of the brainstem, and particularly assesses the trigeminal-facial arch.
Bilateral active and reference surface electrodes were placed over the orbicularis oculi belly and 1 cm lateral to the rim of the eye, respectively.
The startle eyeblink response is recorded as EMG activity of the orbicularis oculi (for a review, see Dawson, Schell, & Bohmelt, 1999).
Bilateral contraction of the orbicularis oculi muscles was also noted.
Summary: Blepharospasm is an uncontrolled spasmodic contraction of the orbicularis muscles of the eye resulting in an abnormal tic or twitich of eyes.
Another, on the other hand, compared the sides of the face in relation specifically to the eyes orbicularis muscles [15].
Muscle position is determined by the balance of the frontal muscle (elevator), the orbicularis oculi, depressor supercili, corrugator supercilli and proserus (depressor).