T5: Development of the Face, Palate, Nose, and Tongue

Question 1

The anterior 2/3 of the tongue are derived how? (mm)

Answer 1

The 2 lateral swellings increase in size and overgrow the tubercular impar

post 1/2 is from the hypo pharyngeal eminence (3rd + 4th arch) overgrowing the copula (2nd arch) which disappears

Question 2

Development of cartilaginous vs membranous nuerocranium?

Answer 2

Cartiligenous undergoes endochondrial membranous ossification. Membranous undergoes intramembranous ossification

Question 3

The ventral 3rd arch gives rise to?

Answer 3

the greater horn of the hyoid bone

Question 4

A child has an anterior cleft lip. Where is the cleft?

A. Alveolar part of hard palate
B. Small part of the premaxilla
C. Secondary Part of the hard palate & soft Palate.

RFA

Answer 4

ANS. A. Anterior cleft is a cleft of alveolar part the hard palate

B. The premaxilla-is what the primary palate develops into, along with a small part of the hard palate
C. A Posterior cleft is a cleft in the Secondary part of the hard and soft palates

Note: the anterior and posterior positions are in relation to the incisive foramen