orbicularis oculi

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 ?
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.
Traditional three layered technique has been recommended by Irby (2004) to treat eyelid laceration with deep layer covering fibrous tarsal layer and orbicularis oculi layer, intermediate layer involving subcutaneous tissue and superficial layer involving skin.
Second, we studied responses of orbicularis oculi (O.oc), masseter, sternocleidomastoid (SCM), biceps brachii, abductor pollicis brevis (APB), and tibialis anterior muscles after supraorbital electrical stimuli, auditory stimuli (auditory startle reflex, ASR), and electrical stimuli of the median nerve at the wrist (startle reflex to somatosensory inputs, SSS).
The graft is sustained by the orbicularis oculi blood supply that is undermined and sutured into the space left by the divided muscle.
* Look for contraction of the orbicularis oculi muscle if convergence spasm is suspected, in which case associated contraction of this muscle of the face during eye movement examination usually also occurs.
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.
Normal blinking of human eye increases IOP by 10mmHg and forceful contraction of the orbicularis oculi can increase IOP to Greater than 50mmHg.3 Coughing, straining, and vomiting can lead to an increase in IOP of 30-40mmHg.
On examination, the patch had reduced sensation and loss of hair and the right orbicularis oculi, muscle power was found to be weak.