CANS Facial Anatomy & Physiology — Questions and Answers
Question 1: Which artery is most at risk during filler injections in the nasolabial fold?
- Temporal artery
- Facial artery (Correct answer)
- Occipital artery
- Maxillary artery
Correct answer: Facial artery
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?
- Orbicularis oculi
- Corrugator supercilii (Correct answer)
- Frontalis
- Zygomaticus major
Correct answer: Corrugator supercilii
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?
- Raises the eyebrows
- Controls nostril flaring
- Closes and puckers the lips (Correct answer)
- Elevates the upper eyelid
Correct answer: Closes and puckers the lips
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?
- Epidermis
- Stratum corneum
- Dermis (Correct answer)
- Subcutaneous fat
Correct answer: Dermis
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?
- Masseter
- Orbicularis oculi (Correct answer)
- Mentalis
- Buccinator
Correct answer: Orbicularis oculi
The orbicularis oculi surrounds the eye and contributes to crow’s feet formation, making it a common injection site.
Question 6: What is the main function of subcutaneous fat in the face?
- Produces melanin
- Stores collagen
- Provides structural support and contour (Correct answer)
- Regulates skin hydration
Correct answer: Provides structural support and contour
Subcutaneous fat provides cushioning, insulation, and contributes to facial contour and volume.
CANS Facial Anatomy & Physiology
Which artery is most at risk during filler injections in the nasolabial fold?