Unlike the muscles in the cheek, the muscles that draw up the corners of the eye during a genuine smile are not under voluntary control. These muscles are called __________.
A) Corrugator supercilli
B) Zygomaticus major
C) Orbicularis oculi
D) Tracheal muscle

Question

Quizplus · Accepted Answer

The muscles that draw up the corners of the eye during a genuine smile are called the orbicularis oculi. These muscles are involved in the facial expressions of a genuine smile, also known as a Duchenne smile, and are not under voluntary control.

Unlike the Muscles in the Cheek, the Muscles That Draw