Muscles of the Face, Neck, Trunk, and Arm

This muscle (A) allows you to raise your eyebrows and to wrinkle your forehead.

• Cranial aponeurosis

• Temporalis

• Frontalis

• Occipitalis

This muscle (B) allows you to close your eyes, squint, blink, and wink.

• Orbicularis oris

• Orbicularis oculi

• Zygomaticus

• Platysma

This muscle (C) is called the "smiling" muscle because it raises the corners of the mouth upward.

• Orbicularis oris

• Buccinator

• Zygomaticus

• Masseter

This muscle (D) flattens the cheek (as in whistling or blowing a trumpet).

• Orbicularis oris

• Buccinator

• Zygomaticus

• Masseter

This muscle (E) closes the mouth and protrudes the lips. It is often called the "kissing" muscle.

• Orbicularis oris

• Buccinator

• Zygomaticus

• Orbicularis oculi

This muscle (F) pulls the corners of the mouth inferiorly, producing a downward sag of the mouth (the "sad clown" face).

• Sternocleidomastoid

• Platysma

• Masseter

• Temporalis

This muscle (H) lies over the temporal bone and helps the masseter close the jaw.

• Trapezius

• Platysma

• Sternocleidomastoid

• Temporalis

This muscle (I) covers the posterior aspect of the skull and pulls the scalp posteriorly.

• Occipitalis

• Frontalis

• Cranial aponeurosis

• Temporalis

This chewing muscle (J) closes the jaw by elevating the mandible.

• Occipitalis

• Trapezius

• Masseter

• Temporalis

This muscle (K) flexes your neck. Some people call this the "prayer" muscle. It can also rotate the head toward the shoulder and tilt the head to the side.

• Platysma

• Sternocleidomastoid

• Occipitalis

• Trapezius