Muscle and their Functions

What is the function of the Frontalis muscle?

• Closes eye

• Raises corners of mouth; smiling

• Raises eyebrows and wrinkles forehead

What is the function of the Orbicularis oculi muscle?

• Flexes, tilts and rotates head

• Closes eye

• Shrug shoulders

What is the function of the Orbicularis oris muscle?

• Raises eyebrows and wrinkles forehead

• Shrug shoulders

• Closes lips; kissing and whistling

What is the function of the Sternocleidomastoid muscle?

• Extends, adducts, and medially rotates arm

• Flexes, tilts, and rotates head

• Dorsiflexion of the foot; inverts foot

What is the function of the Zygomaticus muscle?

• Flexes, tilts, and rotates head

• Raises corners of mouth; smiling

• Extends, adducts, and medially rotates arm

What is the function of the Masseter muscle?

• Abducts, flexes, and rotates thigh

• Elevates (closes) and protracts jaw, as when chewing

• Extends hand

What is the function of the Trapezius muscle?

• Extends leg

• Shrug shoulders

• Closes lips; kissing and whistling

What is the function of the Latissimus dorsi muscle?

• Lateral rotation of the vertebral column; twisting

• Extends, adducts, and medially rotates arm

• Raises corners of mouth; smiling

What is the function of the Pectoralis major muscle?

• Crosses the leg

• Flexes, adducts, and medially rotates arm

• Flexion of the vertebral column; sit-ups

What is the function of the External oblique muscle?

• Dorsiflexion of the foot; inverts foot

• Lateral rotation of the vertebral column; twisting

• Flexes thigh and extends leg