Facial Muscles - Upper Group: Difference between revisions
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Orbitcularis Oculi | Orbitcularis Oculi | ||
Corrugator | Corrugator Supercilii | ||
=== Occipitofrontalis | === Occipitofrontalis === | ||
Occipitofrontalis is one of the muscles of the scalp. It consists of 2 separate bellies: | |||
* Occipital part - which originates from occipital bone (lateral part of the upper nuchal line) and from the mastoid aspect of the temporal bone. | |||
* Frontal part - originates from the superior fibres of the other upper facial muscles (ie. orbicularis oculi, corrugator supercilii and procerus | |||
* Both parts insert into the galea aponeurotica in the scalp | |||
Nerve supply is the Facial Nerve (CN VII), with the occipital belly supplied by the posterior auricular branch, and the frontal belly by the temporal branch. | |||
Blood supply of the occipital portion is from the occipital artery, and the frontal segment is supplied by the supraorbital and supratrochlear arteries. | |||
=== Origin === | === Origin === | ||
Revision as of 21:43, 6 June 2020
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Description[edit | edit source]
The muscles of the upper portion of the face can be divided into 2 groups:
- Orbital Facial Muscles
- Nasal Facial Muscles
We will examine the 2 groups separately.
Orbital Facial Muscles[edit | edit source]
There are 3 Orbital Facial Muscles:
Occipitofrontalis (often referred to simply as Frontalis)
Orbitcularis Oculi
Corrugator Supercilii
Occipitofrontalis[edit | edit source]
Occipitofrontalis is one of the muscles of the scalp. It consists of 2 separate bellies:
- Occipital part - which originates from occipital bone (lateral part of the upper nuchal line) and from the mastoid aspect of the temporal bone.
- Frontal part - originates from the superior fibres of the other upper facial muscles (ie. orbicularis oculi, corrugator supercilii and procerus
- Both parts insert into the galea aponeurotica in the scalp
Nerve supply is the Facial Nerve (CN VII), with the occipital belly supplied by the posterior auricular branch, and the frontal belly by the temporal branch.
Blood supply of the occipital portion is from the occipital artery, and the frontal segment is supplied by the supraorbital and supratrochlear arteries.
