Facial Muscles and Their Expressions Explained

The video tutorial covers the anatomy and function of the platysma and auricular muscles, which are involved in facial expressions. It details the specific muscles responsible for expressions like surprise, anger, and laughter, and explains how these muscles can be clinically tested to assess facial nerve function.

What is the primary function of the platysma muscle?

• To close the eyelids

• To retract the angle of the mouth

• To tense the skin of the neck

• To elevate the eyebrows

Which muscles are associated with the ear and contribute to facial expressions?

• Buccinator

• Mentalis

• Auricular muscles

• Zygomaticus major

Which muscle is responsible for creating transverse wrinkles on the forehead when surprised?

• Zygomaticus minor

• Frontalis

• Corrugator supercili

• Procerus

What muscle is involved in the expression of anger by dilating the anterior nasal aperture?

• Mentalis

• Rosorius

• Levator labii superioris

• Dilator neris

Which muscle is primarily responsible for drawing the angle of the mouth upwards and laterally when laughing?

• Buccinator

• Levator anguli oris

• Zygomaticus major

• Orbicularis oris

Which muscle is involved in the expression of sadness by accentuating the nasolabial fold?

• Levator labii superioris

• Corrugator supercili

• Orbicularis oculi

• Procerus

What muscle is responsible for the retraction of the angle of the mouth laterally when grinning?

• Levator anguli oris

• Rosorius

• Mentalis

• Zygomaticus major

Which muscle causes the protrusion of the lower lip when expressing disdain or doubt?

• Mentalis

• Buccinator

• Orbicularis oris

• Frontalis

How is the frontalis muscle clinically tested?

• By asking the patient to puff the mouth

• By asking the patient to close the eyes tightly

• By asking the patient to look upwards without moving the head

• By asking the patient to whistle

Which muscle is tested by asking the patient to smile gently?

• Buccinator

• Zygomaticus major

• Rosorius

• Orbicularis oculi