Arkansas Esthetician Practice Exam

What is the function of the Buccinator muscle?

1. Moves the mouth up and back

2. Wrinkles the nose

3. Compresses cheeks to release air outwardly

4. Closes the jaw

The correct answer is: Compresses cheeks to release air outwardly

The Buccinator muscle plays a crucial role in facial expression and functional activities such as chewing. Its primary function is to compress the cheeks against the teeth, which is vital for holding food in place while chewing and for expelling air when blowing. This muscle acts like a kind of natural barrier, preventing food from escaping into the vestibule of the mouth during mastication. The ability to compress the cheeks also contributes to actions such as whistling and playing wind instruments, highlighting its importance in oral functions and communication. While the other options mention movements related to facial expression or jaw function, they do not accurately capture the specific role of the Buccinator muscle. Specifically, it does not move the mouth upward or backward, wrinkle the nose, or close the jaw, which are functions attributed to different muscles in the face and jaw. Thus, the function of the Buccinator muscle is indeed best described by its ability to compress the cheeks to aid in various oral activities.