Be able to for each muscle identify the muscle, action, origin and insertion Muscles MUSCLES OF THE ORIGIN INSERTION ACTION NERVE HEAD Frontalis Epicranial aponeurosis Skin over forehead Elevates eyebrows and wrinkles skin of Facial VII forehead Occipitalis Nuchal line on occipital bone Epicranial aponeurosis Fixes epicranial aponeurosis and pulls Facial VII scalp posteriorly Nasalis Maxillary bone; cartilage of nose Bridge of nose Compresses nostrils; dilates nostrils Facial VII Temporalis Temporal bone Coronoid process of mandible Elevates and retracts mandible Trigeminal V Masseter Zygomatic process and arch Ramus of mandible Elevates mandible Trigeminal V Orbicularis oculi Medial orbital margin Skin surrounding eye Closes eyelids and acts during Facial VII squinting and blinking Orbicularis oris Maxillary bone; mandible lips Closes and purses lips Facial VII Zygomaticus major Zygomatic bone Corner of mouth Elevates corner of Facial VII Zygomaticus minor Zygomatic bone Upper lip Raises upper lip Mentalis Alveolar ridge of incisors of mandible Skin over chin Elevates and protrudes lip Facial VII Risorius Fascia of masseter Corner of mouth Draws corner of mouth laterally Facial VII
Be able to identify the muscle, action, origin and insertion for each muscle Muscles MUSCLES OF THE HEAD ORIGIN INSERTION ACTION NERVE Frontalis Epicranial aponeurosis Skin over forehead Elevates eyebrows and wrinkles skin of forehead Facial VII Occipitalis Nuchal line on occipital bone Epicranial aponeurosis Fixes epicranial aponeurosis and pulls scalp posteriorly Facial VII Nasalis Maxillary bone; cartilage of nose Bridge of nose Compresses nostrils; dilates nostrils Facial VII Temporalis Temporal bone Coronoid process of mandible Elevates and retracts mandible Trigeminal V Masseter Zygomatic process and arch Ramus of mandible Elevates mandible Trigeminal V Orbicularis oculi Medial orbital margin Skin surrounding eye Closes eyelids and acts during squinting and blinking Facial VII Orbicularis oris Maxillary bone; mandible lips Closes and purses lips Facial VII Zygomaticus major Zygomatic bone Corner of mouth Elevates corner of Facial VII Zygomaticus minor Zygomatic bone Upper lip Raises upper lip Mentalis Alveolar ridge of incisors of mandible Skin over chin Elevates and protrudes lip Facial VII Risorius Fascia of masseter Corner of mouth Draws corner of mouth laterally Facial VII
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