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
Second, we studied responses of orbicularis oculi
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
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
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.