FACE & PALATE DEVELOPMENT OSCE

Question 1

when does the face begin to develop?

Answer 1

4-8 weeks in utero

Question 2

what pharyngeal arch does the trigeminal nerve originate from?

Answer 2

first pharyngeal arch

Question 3

what pharyngeal arch do the muscles of mastication originate from?

Answer 3

first pharyngeal arch

Question 4

what nerve is associated with the 2nd pharyngeal arch?

Answer 4

the facial nerve

Question 5

what pharyngeal arch are the muscles of face expression associated with?

Answer 5

2nd pharyngeal arch

Question 6

how many prominences does the face develop from?

Answer 6

5 prominences

Question 7

Name the prominences that the face develops from & what structures they give:

Answer 7

• Frontonasal prominance = forehead & bridge of nose
• Medial nasal prominance = midline nose & philturm of upper lip
• Lateral nasal prominance = alae of nose
• Maxillary prominance = cheeks & lateral upper lip
• Mandibular prominance = lower lip & jaw

Question 8

how can the development of the primary palate be described?

Answer 8

• the medial nasal prominance creates the inermaxillary process
• this forms the primary palate (becomes the anterior 1/3rd of definitive palate)

Question 9

how can the formation of the secondary palate be described?

Answer 9

• the maxillary prominance gives rise to lateral palatal shelves
• the palatal shelves fuse with each other in the horizontal plane and the nasal septum in the vertical plane