ANATOMY

Detailed explanation-1: -The levator labii superioris muscle, also known as the quadratus labii, contributes to facial expression and movement of the mouth and upper lip. It courses alongside the lateral aspect of the nose, and its primary function is elevation of the upper lip.

Detailed explanation-2: -Musculus zygomaticus minor It draws the upper lip backward, upward, and outward (used in making sad facial expressions). Like all muscles of facial expression, it is innervated by the facial nerve (CN VII).

Detailed explanation-3: -Levator labii superioris alaeque nasi is a facial muscle that lifts the upper lip and flares the nostrils.

Detailed explanation-4: -Levator labii superioris (LLS)-This superficial muscle works in conjunction with the upper lip’s other muscles to elevate and evert the upper lip. This muscle is an elevator muscle of the upper lip.

Detailed explanation-5: -The mentalis muscle originates at the level of the lower anterior mandibular incisors and travels inferiorly to insert into the skin of the chin. The mentalis is a paired muscle that elevates and protrudes the central portion of the lower lip.