Axial Muscles of the Head, Neck, and Back

What is the function of the Frontalis muscle?

• Close eyelids

• Wrinkle skin of forehead, raise eyebrows

• Pulls corners of lips laterally

• Opens the eye

Which muscle is responsible for closing the eyelids?

• Orbicularis oculi

• Risorius

• Zygomaticus major

• Levator palpebrae

The Orbicularis oris muscle is responsible for _______.

• close and purse lips

• open the eyelids

• flex the biceps

• extend the leg

Which muscle pulls the corners of the lips laterally (grimace)?

• Risorius

• Buccinator

• Zygomaticus minor

• Superior rectus

The Zygomaticus major and minor muscles are responsible for _______.

• pulls corners of lips up (smile)

• frowning

• chewing

• raising eyebrows

What is the function of the Buccinator muscle?

• Tone in cheek, sucking, whistling

• Opens the eye

• Elevates the mandible

• Moves tongue downward

Which muscle opens the eye?

• Levator palpebrae

• Orbicularis oculi

• Masseter

• Temporalis

The Superior rectus muscle is responsible for _______.

• eyeball up

• eyeball down

• eyeball left

• eyeball right

Which muscle moves the eyeball medially?

• Medial rectus

• Inferior rectus

• Lateral rectus

• Superior oblique

The Inferior rectus muscle is responsible for _______.

• eyeball down

• eyeball up

• eyeball left

• eyeball right