orbicularis


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or·bic·u·la·ris

(ōr-bik'yū-lā'ris),
1. Circular; denoting a circular or disc-shaped structure.
2. Synonym(s): orbicular muscle
[L. fr. orbiculus, a small disk]

orbicularis

(or-bik″yŭ-lar′ĭs) (or-bik″yŭ-lar′ēz″) plural.orbiculares
A muscle surrounding an orifice; a sphincter muscle.
References in periodicals archive ?
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.
Among the tardive syndromes, tardive blepharospasm refers to a repetitive, persistent, and severe spasm of the orbicularis oculi muscle as an isolated condition.
laevigata Penard, 1890 * Centropyxis orbicularis Deflandre, 1929 * Centropyxis platystoma Penard, 1890 x x Cyclopyxis spp.
It was traditionally considered as being either anterior or posterior in terms of eyelid involvement, referring to inflammation either anterior or posterior to the grey line (marginal region of orbicularis muscle demarcating anterior lamella--skin and orbicularis from the posterior one--tarsus and conjunctiva).
Enzymehistochemical and morphological characteristics of muscle fibre types in the human buccinator and orbicularis oris.
These researchers instructed their test subjects to view cartoons while holding a pen in their mouth in such a way that either the zygomaticus major muscle (which is used when laughing and smiling) or its antagonist, the orbicularis oris muscle, was contracted.
We carry this incision down to the orbicularis oris musculature.
notatus (Houttuyn, 1782) (Kuwamura 1983), Sphaeramia orbicularis (Cuvier 1828) (Allen 1975), Pterapogon kauclerni Koumans, 1933 (per.
Brazil (SP) Rhetus arcius Riodinini Struthanthus Costa Rica orbicularis Rhetus periander Riodinini Loranthaceae Brazil (PR) Synargis sp.
Using the second part of the coil to form the upper part of the mouth, the orbicularis oris, we get the 'Homer Simpson' look (Fig 3).