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Muscle Group 1

Head and Neck Muscles

Frontalis Origin: Aponeurosis Insertion: Skin of eyebrow Action: Elevates eyebrows; Wrinkles forehead
Orbicularis oculi Origin: Frontal & maxillary bones Insertion: Tissue of eyelids Action: Closes eyes as in blinking
Buccinator Origin: Maxilla & mandible Insertion: Orbicularis oris Action: Compresses cheeks inward (whistling and sucking)
Zygomaticus Origin: Zygomatic bone Insertion: Skin & muscle at corner of mouth Action: Raises corners of mouth (smiling)
Orbicularis oris Origin: Maxilla & mandible Insertion: Skin & muscle around mouth Action: Puckers & closes the lips
Temporalis Origin: Temporal bone Insertion: Mandible (coronoid process) Action: Elevates mandible
Masseter Origin: Zygomatic arch Insertion: Mandible (ramus) Action: Elevates mandible
Sternocleidomastoid Origin: Sternum (manubrium); Clavicle Insertion: Temporal bone (mastoid process) Action: Rotates the head to the opposite side (one); Flexes head (both)
Created by: michael.itonaga



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