Frontalis muscle
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| Frontalis | |
|---|---|
 |
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| Visible at top left | |
| Latin | venter frontalis musculi occipitofrontalis |
| Gray's | subject #105 379 |
| Origin | galea aponeurosis |
| Insertion | Skin above the eyebrows |
| Artery: | ophthalmic artery |
| Nerve: | facial nerve |
| Action: | wrinkles brow |
| Dorlands /Elsevier |
m_22/12549942 |
The Frontalis muscle is thin, of a quadrilateral form, and intimately adherent to the superficial fascia. It is broader than the Occipitalis and its fibers are longer and paler in color. It is located on the front of the head.
It has no bony attachments.
Its medial fibers are continuous with those of the Procerus; its immediate fibers blend with the Corrugator and Orbicularis oculi, thus attached to the skin of the eyebrows[1]; and its lateral fibers are also blended with the latter muscle over the zygomatic process of the frontal bone.
In the eyebrows, its primary function is to lift them (thus opposing the orbital portion of the orbicularis), especially when looking up. It also acts when a view is too distant or dim.[2]
From these attachments the fibers are directed upward, and join the galea aponeurotica below the coronal suture.
The medial margins of the Frontales are joined together for some distance above the root of the nose; but between the Occipitales there is a considerable, though variable, interval, occupied by the galea aponeurotica.
It is considered by some sources not to be a muscle of its own, but to be a part of the occipitofrontalis muscle.
[edit] Additional images
 Muscles of head and neck |
[edit] References
- ^ "eye, human."Encyclopædia Britannica. 2008. Encyclopædia Britannica 2006 Ultimate Reference Suite DVD 5 Apr. 2008
- ^ Ibid
[edit] External links
- LUC fron
- frontal+belly+of+occipitofrontalis+muscle at eMedicine Dictionary
- PTCentral
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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