Muscles of Head and Trumk

Muscles of Facial Expresssion and Chewing
Action	Muscle	Origin	Insertion
*Scalp*
Raise eyebrow	Frontalis	galea aponeurotica	eyebrow
tense scalp	Occipitalis	occipital	galea aponeurotica
*Eye*
Close eyes	Orbicularis oculi	medial orbit	eyelids
*Mouth*
Compress lips	Orbicularis Oris	maxillae mandible	lips
Mouth back, up	Zygomaticus	zygomatic	angle of mouth
*Muscles of Mastication*
Elevate jaw	Temporalis	temporal	coronoid mandible
	Masseter	zygomatic arch	lateral mandible
Compress cheeks	Buccinator	maxillae mandible	orbicularis oris

Muscles of the Spine and Trunk
Action	Muscle	Origin	Insertion
*Muscles of the Spine*
Extend head	Trapezius	c t vertebrae	occipital bone
	Sternocleidomastoid	sternum, clavicle	mastoid process
*Oblique and Rectus Muscles*
Elevate ribs	Ext. Intercostals	inferior ribs	superior ribs
Depress ribs	Int. Intercostals	superior ribs	inferior ribs
Compress abdomen	External Oblique	5th to 12th ribs	ilium linea alba
	Internal Oblique	ilium	lower ribs
	Transversus Abdominus	lower ribs	pubis linea alba
Expand chest	Diaphragm	xiphoid 4-10 ribs	tendon sheet