NEET PG DENTAL EXAM

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: -Orbicularis oris is subdivided into four quadrants (upper, lower, right and left). Each quadrant consists of a major peripheral portion and a smaller marginal portion in the vermillion of the upper and lower lips.

Detailed explanation-3: -In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. It is a sphincter, or circular muscle, but it is actually composed of four independent quadrants that interlace and give only an appearance of circularity. Inferior labial artery and superior labial artery.

Detailed explanation-4: -The main action caused by the orbicularis oris muscle is the pursing or puckering of the lips. These actions of the lips allow you to kiss someone, play a wind instrument, and whistle your favorite song.