Muscle Actions

Muscle that raises the eyebrows.

• Frontalis
• Occipitalis
• Temporalis
• Nasalis

Muscle that compresses and closes the mouth

• Orbicularis Oris
• Orbicularis Oculi
• Frontalis
• Nasalis

Muscle that raises the corner of the mouth

• Zygomaticus
• Orbicularis Oris
• Orbicularis Oculi
• Nasalis

Muscle that closes the jaw

• Temporalis

• Frontalis

• Zygomaticus

Muscle that closes the jaw

• Masseter

• Frontalis

• Zygomaticus

Muscle that flexes the head and rotates the neck.

• Sternocleidomastoid

• Masseter

• Platysma

• Frontalis

What is the function of the TRAPEZIUS?

• Extends the head and neck

• Pulls the arms downward

• Pushes the arms forward

• Raise the arms at the shoulder

flexes and adducts the upper arm

• pectoralis major

• teres major

• latissimus dorsi

• deltoid

extends and adducts the upper arm

• latissimus dorsi

• deltoid

• petoralis major

• teres major

abducts the upper arm

• deltoid

• pectoralis major

• teres major

• latissimus dorsi