Muscles of Facial Expression

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What are the 8 muscles of facial expression?

1. Buccinator 2. Orbicularis Oris 3. Orbicularis Oculi 4. Risorius 5. Zygomaticus Major 6. Zygomaticus Minor 7. Platysma 8. Depressor Anguli Oris

What is the function of the Depressor Angularis Oris muscle?

Depress and draw corners of the mouth laterally

What is the function of the Platysma muscle?

Depress the Mandible

What is the origin of both the zygomatic major (bigger) and minor (smaller) muscles?

Zygmoatic bone

What is the function of the Orbicularis ORIS (oral) muscle?

Close and purse lips

What is the function of the Orbicularis OCULI (ocular) muscle?

Close eyelids

What is the function of the Buccinator muscle?

Compess the cheek

What is the function of the Risorius muscle?

Draw corners of mouth LATERALLY

Identify the 8 muscles of facial expression

1. Buccinator 2. Platysma 3. Zygomaticus Major 4. Zygomaticus Minor 5. Depressor Angularis Oris 6. Risorius 7. Orbicularis Oculi 8. Orbicularis Oris

What is the function of the Zygomaticus MAJOR muscle?

Elevates CORNER of mouth (smile)

What is the function of the Zygomaticus MINOR muscle?

Elevates the upper lip

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