Chapter 56- Plastics Anatomy/Embryology/Rads

Question 1

What is the SMAS?

Answer 1

superficial muscular aponeurotic system

discrete fascial layer separating SQ fat from underlying parotidomasseteric fascia, CN VII

Question 2

What causes deepening of nasolabial crease as patients age?

Answer 2

descent of: (sup to deep)
SQ malar fat pad
Orb oculi
Suborbic orbital fat pad

Question 3

Formation of upper lip

Answer 3

Maxillary prominences and medial nasal prominences
Max- lateral lip
Med Nas- philtrum, medial upper lip, columella, nasal tip
6 wk gestation

Question 4

3 embryologic structures leading to nose formation

Answer 4

Frontal nasal prominence- bridge
Medial nasal prominences- tip, columella
Paired lateral nasal prominences- alae

Question 5

Formation of primary palate

Answer 5

end of 5th wk
fusion medial nasal prominences
anterior to incisive foramen

Question 6

Formation of secondary palate

Answer 6

fusion of palatine shelves (extensions of maxillary prominences)
Fusion from A –> P, end w/ uvula creation

Question 7

Describe bilateral complete cleft palate

Answer 7

vomer and premaxilla don’t fuse with palatal shelves

Question 8

Hillocks forming ear

Answer 8

1- tragus
2/3- crus helicis
4- crus antihelicis
5- helix
6- antitragus

Question 9

5 layers of forehead/scalp

Answer 9

Skin
subCutaneous tissue
galea Aponeurosis
Loose areolar tissue
Pericranium

Question 10

With what fascia is the galea aponerosis continuous with inferiorly

Answer 10

temporoparietal fascia below temporal line

Question 11

Brow elevators/depressors (4)

Answer 11

Frontalis- elevator

Procerus, corrugator supercilii, orb oculi- depressor

Question 12

With which fascias is the SMAS continuous?

Answer 12

temporal perital fascia in temporal region

platysma in neck

Question 13

Facial muscles located deep to facial nerve supply

Answer 13

buccinator, levator anguli oris, mentalis

Question 14

What does the angular artery supply?

Answer 14

lateral soft tissue envelope of nose

Question 15

facial aesthetic subunits

Answer 15

forehead and brow
periorbita
cheek
nose
perioral and chin
neck

Question 16

9 aesthetic subunits nose

Answer 16

tip
dorsum
columella
sidewalls
alae
soft tissue facets