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Skeleton Muscles1
Origin Insertion Action-Head and neck
Muscle | Origin | Insertion | Action |
---|---|---|---|
Frontalis | galea aponeurotica | skin of eyebrows and nose | raises eyebrows |
Zygomaticus | Zygomatic bone | skin of mouth | pulls mouth up; allows smiling |
Masseter | Zygomatic and maxilla bones | mandible | closes jaw |
Orbicularis Oris | encircles the mouth | skin at corners of mouth | closes and purses lips as in kissing |
Temporalis | Temporal bone | mandible | Clenches teeth;elevates jaw |
Buccinator | Maxilla and mandible | orbicularis oris | Pulls corners of mouth laterally |
Platysma | Fascia of Chest | mandible and skin of lower face | allows pouting;draws lip draw and back |
Sternocleidomastoid | Sternum and Clavicle | mastoid process of temporal bone | Drawa head forward;contraction of one muscles causes lateral rotation of head |
Occipitalis | galea aponeurotica | Draws scalp backward | |
Orbicularis Oculi | medial side of orbit | encircles eye | closes eyelid |