Muscle Functions

Chewing, elevates and protracts mandible

• masseter

• temporalis

• frontalis

• buccinator

chewing, elevates and retracts the mandible

• masster

• temporalis

• frontalis

• buccinator

flexes and rotates head

• sternocleidomastoid

• suprahyoid

• infrahyoid

• temporalis

swallowing and speech - move hyoid bone forward

• suprahyoid

• infrahyoid

• sternocleidomastoid

• frontalis

swallowing and speech - move hyoid bone downward

• infrahyoid

• suprahyoid

• masster

• buccinator

adduct and flex arm

• pectoralis major

• pectoralis minor

• external intercostals

• internal intercostals

stabilizes scapula, elevates ribs

• pectoralis minor

• pectoralis major

• serratus anterior

• rectus abdominis

elevates rib cage for inspiration

• external intercostals

• internal intercostals

• serratus anterior

• pectoralis minor

depress rib cage for forced expiration

• internal intercostals

• external intercostals

• serratus anterior

• pectoralis major

protracts scapula, raises arm

• serratus anterior

• deltoid

• pectoralis minor

• pectoralis major