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Muscles - Head
Muscles of the Head
| Term | Definition |
|---|---|
| frontalis | origin: epicranial aponeurosis |
| frontalis | insertion: skin of eyebrows, bridge of nose |
| frontalis | "forehead" muscle |
| frontalis | action: raises eyebrows, wrinkles forehead |
| occipitalis | origin: occipital bone |
| occipitalis | insertion: epicranial aponeurosis |
| occipitalis | base of neck |
| occipitalis | action: tenses and retracts scalp |
| orbicularis oculi | origin: medial margin of orbit |
| orbicularis oculi | insertion: skin around eyelids |
| orbicularis oculi | circles your eye and eye socket |
| orbicularis oculi | action: closes eye |
| zygomaticus | origin: zygomatic bone |
| zygomaticus | insertion: angle of mouth; upper lip |
| zygomaticus | near corner of lips |
| zygomaticus | action: draws corner of mouth back and up |
| orbicularis oris | origin: maxillary bone and mandible |
| orbicularis oris | insertion: lips |
| orbicularis oris | circles lips |
| orbicularis oris | compresses, purses lips |
| buccinator | origin: maxillary bone and mandible |
| buccinator | insertion: blends into fibers of orbicularis oris |
| buccinator | cheek muscle |
| buccinator | action: compresses cheeks |
| platysma | origin: from cartilage of second rib to acromion of scapula |
| platysma | insertion: mandible and skin of cheek |
| platysma | broad sheet of muscle rising from chest and shoulder and runs up the neck |
| platysma | action: tenses skin of neck, depresses mandible |
| masseter | origin: zygomatic arch |
| masseter | insertion: lateral surface of mandible |
| masseter | near angle of jaw |
| masseter | action: elevates mandible |
| temporalis | origin: along temporal lines of skull |
| temporalis | insertion: coronoid process of mandible |
| temporalis | side of skull |
| temporalis | action: elevates mandible |