Muscles of Mastication and Facial Expression

This video tutorial covers the muscles of facial expression and mastication. It explains the functions and locations of various muscle groups, including the oral, orbital, nasal, auricular, and mastication muscles. The tutorial highlights how these muscles contribute to expressions like smiling, frowning, and chewing. It also discusses the anatomical structure and origin of these muscles, providing insights into their roles in facial movements.

What is the primary function of the muscles of mastication?

• To wrinkle the forehead

• To aid in chewing and grinding food

• To assist in facial expressions

• To move the ears

Which muscle encircles the mouth and helps in puckering the lips?

• Zygomaticus major

• Frontalis

• Orbicularis oris

• Risorius

Which muscle is known as the 'Elvis muscle' due to its role in a snarling expression?

• Depressor anguli oris

• Levator anguli oris

• Levator labii superioris alaeque nasi

• Mentalis

What is the function of the orbicularis oculi muscle?

• To move the ears

• To open the nostrils

• To elevate the upper lip

• To close the eyes

Which muscle compresses the nostrils?

• Depressor septi nasi

• Dilator naris

• Transverse nasalis

• Procerus

What is the role of the frontalis muscle?

• To assist in chewing

• To close the mouth

• To move the ears

• To raise the eyebrows and wrinkle the forehead

Which muscle is responsible for slight wrinkling of the neck skin?

• Orbicularis oris

• Platysma

• Frontalis

• Masseter

Which muscle is the strongest among the muscles of mastication?

• Medial pterygoid

• Masseter

• Lateral pterygoid

• Temporalis

What is the function of the medial pterygoid muscle?

• To open the mouth

• To close the jaw by elevating the mandible

• To move the ears

• To wrinkle the forehead

Which muscle helps prevent food from accumulating in the cheeks?

• Masseter

• Orbicularis oris

• Frontalis

• Buccinator