bio107lab5


 * Lab #7 handout MUSCLES OF THE HEAD AND FACE**


 * __MUSCLE__** **actions**


 * Buccinator - compresses cheeks**
 * Frontalis- raises eyebrows; wrinkles forehead**
 * Masseter- elevates mandible**
 * Orbicularis oris- compresses; purses lips**
 * Orbicularis oculi- closes eyes**
 * Sternocleidomastoid-flexes neck; turns face**
 * Occipitalis- tenses and retracts scalp**
 * Zygomaticus - draws corner of mouth back and up**
 * Temporalis – elevates mandible**
 * Platysma- tenses skin of neck and depresses mandile**




 * TERMS**

BUCCINATOR= TRUMPETER ORBICULARIS= CIRCLE ORIS= MOUTH OCULI = EYE

Many of these muscles originate on the surface of the skull and insert into the dermis Thus when they contract the skin moves

Chewing motions are mostly made by Masseter assisted by Temporalis