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Muscles of the Head- facial expressions
Muscles of the head- facial expressions
11
Anatomy
Undergraduate 1
11/04/2009

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Cards

Term
Epicranius: Occipitalis
Definition

Origin: Occipital bone

Insertion: Galea aponeurotica

Action: pulls scalp posteriorly

Term
Epicranius: Frontalis
Definition

Origin: Galea aponeurotica

Insertion: Skin of eyebrows

Action: Raise eyebrows; wrinkle forehead

Term
Corrugator supercillii
Definition

Origin: Frontal bone

Insertion: Skin of eyebrow

Action: Draws eyebrows together; wrinkles forehead

Term
Orbicularis oculi
Definition

Origin: Frontal and maxillary bones

Insertion: Tissue of eyelid

Action: Draws eyebrows downward (blink, squint)

Term
Orbicularis oris
Definition

Origin: Maxilla and mandible (indirect)

Insertion: Muscles and skin at edge of mouth

Action: Closes lips; purses and protrudes lips (kiss)

Term
Bucinator
Definition

Origin: Maxilla and mandible

Insertion: Oribicularis oris

Action: Draws corner of mouth laterally

Term
Zygomaticus
Definition

Origin: Zygomatic bone

Insertion: Muscles and skin at edge of mouth

Action: Raises corners of mouth upwards

Term
Platysma
Definition

Origin: Fascia of chest

Insertion: Lower margin of mandible

Action: Depress mandible

Term
Risorius
Definition

Origin: Fascia of masseter

Insertion: Angle of mouth

Action: Draws lips laterally

Term
Levator labii superioris
Definition

Origin: Zygomatic and maxilla

Insertion: Skin and muscle of upper lip

Action: Opens lips; flares nostril

Term
Depressor labii inferioris
Definition

Origin: Mandible

Insertion: Skin and muscle of lower lip

Action: Draws lower lip downward

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