| Facial muscles | |
|---|---|
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| Head | |
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| Lateral head anatomy | |
| Latin | musculi faciei |
| Origin | |
| Insertion | |
| Artery | |
| Nerve | facial nerve |
| Actions | |
The facial muscles are a group of striated muscles innervated by the facial nerve that, among other things, control facial expression. These muscles are also called mimetic muscles.
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Structure
The facial muscles are subcutaneous (just under the skin) muscles that control facial expression. They generally originate on bone, and insert on the skin of the face.
Innervation
The facial muscles are innervated by facial nerve (cranial nerve VII). In contrast, the nearby masticatory muscles are innervated by the mandibular nerve, a branch of the trigeminal nerve (V).
Development
The facial muscles are derived from the second branchial/pharyngeal arch.
List of muscles
The facial muscles include:[1]
- Occipitofrontalis
- Procerus
- Nasalis muscle
- Depressor septi nasi
- Orbicularis oculi
- Corrugator supercilii
- Depressor supercilii
- Auricular muscles (anterior, superior, posterior)
- Orbicularis oris
- Depressor anguli oris
- Risorius
- Zygomaticus major
- Zygomaticus minor
- Levator labii superioris
- Levator labii superioris alaeque nasi
- Depressor labii inferioris
- Levator anguli oris
- Buccinator
- Mentalis
The platysma is innervated by the facial nerve. Although it is mostly in the neck, due to its common innervation it can sometimes also be considered a muscle of facial expression.[citation needed]
The stylohyoid muscle, stapedius and posterior belly of the digastric muscle are also innervated by the facial nerve, but are not considered muscles of facial expression.
See also
References
- ^ Kyung Won, PhD. Chung (2005). Gross Anatomy (Board Review). Hagerstown, MD: Lippincott Williams & Wilkins. p. 364. ISBN 0-7817-5309-0.
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External links
- ARTNATOMY: Anatomical Basis of Facial Expression Learning Tool
- lesson1 at The Anatomy Lesson by Wesley Norman (Georgetown University)
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