GROSS ANATOMY

Detailed explanation-1: -Orbicularis oris muscle, also known as musculus orbicularis oris is a complex, multi-layered muscle which attaches through a thin, superficial musculoaponeurotic system to the dermis of the upper lip and lower lip and serves as an attachment site for many other facial muscles around the oral region.

Detailed explanation-2: -Lip function is mainly controlled by the orbicularis oris muscle, which completely encircles the opening of the mouth, thus providing oral competence. This muscle is not perfectly circular, because the upper and lower lip muscle components decussate at the commissures.

Detailed explanation-3: -Orbicularis oris Closes and protrudes lips as in kissing Zygomaticus major Draws angle of mouth superiorly and laterally as in smiling. Levator labii superioris Raises upper lip.

Detailed explanation-4: -Mentalis Sometimes called the ‘pouting muscle’, contraction of the Mentalis raises and thrusts out the lower lip to make us pout.

Detailed explanation-5: -Orbicularis oris, a circle of muscle around your mouth that closes or purses your lips.