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Muscle Group 1
Head and Neck Muscles
Question | Answer |
---|---|
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) |