CANS Facial Anatomy & Physiology

Question 1

Which artery is most at risk during filler injections in the nasolabial fold?

Accepted Answer

Facial artery

Answer

The facial artery runs close to the nasolabial fold, and unintentional injection can cause vascular compromise.

Question 2

Which muscle is primarily responsible for frown lines between the eyebrows?

Accepted Answer

Corrugator supercilii

Answer

The corrugator supercilii muscle contracts to draw the eyebrows downward and together, creating glabellar lines.

Question 3

What is the function of the orbicularis oris muscle?

Accepted Answer

Closes and puckers the lips

Answer

The orbicularis oris encircles the mouth and is involved in lip movement such as puckering and closing the lips.

Question 4

Which layer of the skin contains blood vessels and nerves?

Accepted Answer

Dermis

Answer

The dermis houses capillaries, nerve endings, and connective tissue, playing a key role in sensation and circulation.

Question 5

Which facial muscle is commonly targeted to treat crow’s feet with botulinum toxin?

Accepted Answer

Orbicularis oculi

Answer

The orbicularis oculi surrounds the eye and contributes to crow’s feet formation, making it a common injection site.

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