Frontalis muscle
2561804
213023565
2008-05-17T11:57:49Z
Alexchris
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/* External links */
{{Muscle infobox |
Name = Frontalis |
Latin = venter frontalis musculi occipitofrontalis |
GraySubject = 105 |
GrayPage = 379 |
Image = Musculus frontalis.png |
Caption = Visible at top left |
Origin = [[galea aponeurosis]] |
Insertion = [[Skin above the eyebrows]] |
Blood = [[ophthalmic artery]] |
Nerve = [[facial nerve]] |
Action = wrinkles [[brow]] |
DorlandsPre = m_22 |
DorlandsSuf = 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 supercilii muscle|Corrugator]] and [[Orbicularis oculi]], thus attached to the skin of the eyebrows<ref> "eye, human."Encyclopædia Britannica. 2008. Encyclopædia Britannica 2006 Ultimate Reference Suite DVD 5 Apr. 2008 </ref>; 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.<ref> Ibid </ref>
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]].
==Additional images==
<gallery>
Image:Illu head neck muscle.jpg|Muscles of head and neck
</gallery>
==References==
<references/>
==External links==
* {{MuscleLoyola|fron}}
* {{eMedicineDictionary|frontal+belly+of+occipitofrontalis+muscle}}
* [http://www.ptcentral.com/muscles/musclehead.html#frontalis PTCentral]
{{Gray's}}
{{muscle-stub}}
{{Muscles of head}}
[[Category:Muscles of the head and neck]]
[[de:Musculus frontalis]]
[[it:Muscolo frontale]]
[[hu:Homlokizom]]
[[fi:Otsalihas]]
[[zh:額肌]]