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Frontalis muscle
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The frontalis muscle, also commonly referred to as the frontal belly of the occipitofrontalis muscle, is a muscle of facial expression and forms part of the epicranial muscle group. The frontalis does not have any bony attachments, rather it adheres to the superficial fascia of the eyebrows and blends with adjacent muscles (procerus, corrugator supercilii, orbicularis oculi) anteriorly, while it ascends to join the epicranial aponeurosis (galea aponeurotica) posteriorly.
The functions of the frontalis include: pulling the scalp anteriorly, wrinkling of the forehead and elevation of the eyebrows. It is innervated by the temporal branches of the facial nerve (CN VII).
| Terminology |
English: Frontalis muscle Latin: Musculus frontalis |
| Origin | Skin of eyebrow, muscles of forehead |
| Insertion | Epicranial aponeurosis |
| Action | Elevates eyebrows, pulls scalp anteriorly and wrinkles skin of forehead. |
Learn more about the muscles of facial expression with this study unit:
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