Most of the muscles of the face, known as muscles of facial expressions, differ from othermuscles as they do not cause any movement at joints but get themselvesattached to skin or connective tissues. This insertion into the skin is responsible for many actionsin the face like smiling, frowning, blinking, winking, surprised expression, and whistling. The muscles of the face also help in chewing, closing and opening the mouth, drinking, sucking, and many more such activities.

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Chapter 9, Problem 11CYR

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Most of the muscles of the face, known as muscles of facial expressions, differ from othermuscles as they do not cause any movement at joints but get themselvesattached to skin or connective tissues. This insertion into the skin is responsible for many actionsin the face like smiling, frowning, blinking, winking, surprised expression, and whistling. The muscles of the face also help in chewing, closing and opening the mouth, drinking, sucking, and many more such activities.

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