Frontalis Muscle: Origin, Action & Nerve

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  • 0:04 Frontalis Muscle
  • 0:25 Frontalis Origin
  • 1:07 Frontalis Action
  • 1:24 Frontalis Nerve
  • 1:57 Lesson Summary
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Lesson Transcript
Instructor: Dan Washmuth

Dan has taught college Nutrition, Anatomy, Physiology, and Sports Nutrition courses and has a master's degree in Dietetics & Nutrition.

The frontalis muscle is a muscle located at the forehead of the skull. In this lesson, learn about the origin, action, and nerve of the frontalis muscle.

Frontalis Muscle

Think about the last time you were ever shocked or surprised. How did your facial expression look? I can bet there's a good chance that the last time you were shocked or surprised, your eyebrows went up and your forehead wrinkled. Did you know that these facial expressions are made possible by a muscle? Specifically, it's the frontalis muscle, which is a muscle located at the forehead of the skull.

Frontalis Origin

The origin of a muscle refers to the location of the body where a muscle starts or begins. Therefore, the origin of the frontalis muscle is the galea aponeurotica, which is a fibrous layer that covers the top of the cranium and extends from the forehead to the back base of the skull. The frontalis muscle originates at the anterior, or front, of the galea aponeurotica, which is near the top of the forehead.

From the galea aponeurotica, the frontalis muscle extends down the forehead and attaches, or ends, at the eyebrows and upper nose. Specifically, the end of the frontalis muscle interdigitates, or blends, with the muscles of the eyebrows and nose, which include the orbicularis oculi muscle and the procerus muscle.

Frontalis Action

Since the frontalis muscle begins near the front of the forehead and extends down to the eyebrows, this muscle is involved in several movements of these facial structures. Specifically, the frontalis muscle allows you to raise your eyebrows, wrinkle your forehead, and move your scalp posteriorly, or backward.

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