Occipitofrontalis

Description

Occipitofrontalis

Name

• Occipitofrontalis
• Epicranius muscle
• Occipitofrontalis Muscle
• Epicranius
• Fronto-occipitalis

General

• Long, wide muscle of the scalp
• Spans from the eyebrows to the superior nuchal lines of the occipital bones
• Consists of frontal and occipital bellies, each containing a pair of quadrangular muscle heads
• Bellies are connected by thick fibrous sheath termed epicranial aponeurosis

Origin

• Frontal belly (Frontalis): Skin of eyebrow, muscles of forehead
• Occipital belly (Occipitalis): (Lateral 2/3 of) superior nuchal line

Insertion

• Epicranial aponeurosis

Action

• Frontal belly: Elevates eyebrows, wrinkles skin of forehead
• Occipital belly: Retracts scalp

Innervation

• Frontal belly: Temporal branches of facial nerve
• Occipital belly: Posterior auricular nerve (branch of facial nerve)

Vascular Supply

• Superficial Temporal Artery
• Ophthalmic Artery
• Posterior Auricular Artery
• Occipital Artery

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Clinical Significance

• Needs to be updated

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See Also

• Head Anatomy Main
• HEENT Main
• Muscle Anatomy Main

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