NEET PG DENTAL EXAM

Detailed explanation-1: -The orbicularis oculi muscle closes the eyelids and assists in pumping the tears from the eye into the nasolacrimal duct system. The orbital section of the orbicularis oculi is more involved in the voluntary closure of the eyelid, such as with winking and forced squeezing.

Detailed explanation-2: -Orbicularis oris muscle along with the buccinator and pharyngeal constrictor form a functional unit, known as “buccinator mechanism” which has an important role in orofacial function (swallowing, sucking, whistling, chewing, vowel pronunciation, kissing).

Detailed explanation-3: -This muscle receives blood from the maxillary, superficial temporal, facial, and ophthalmic arteries. The orbicularis oculi originates from the frontal bone, maxilla, medial palpebral ligament, and lacrimal bone, and it inserts onto the lateral palpebral raphe and the upper and lower tarsal plates (eyelids).