Neuro 1: Emb Of Face, Palate And Nasal Cavity

Front 1

What two facial prominences make up the first arch?

Back 1

Maxillary and Mandibular

Front 2

thickenings of the surface ectoderm

Back 2

Placode

Front 3

Name the 3 placodes

Back 3

Otic, Lens and nasal

Front 4

Depression in the center of 5 facial prominences

Back 4

Stomodeum

Front 5

What communicates with the pharynx after the breakdown of the oropharyngeal (buccopharyngeal) membrane and around what day?

Back 5

Stomodeum (Floor forms the ectodermal surface of the membrane) around day 24

Front 6

What forms the midline of the nose, part of the nasal septum and intermaxillary segment?

Back 6

Medial nasal prominences migrate medially and merge

Front 7

What merges around week 4 to form lower lip, jaw, inferior face ?

Back 7

Mandibular prominences

Front 8

What forms the side of the nose?

Back 8

Lateral nasal prominences

Front 9

What forms the philtrum (midline portion) of the upper lip?

Back 9

Labial component of intermaxiallary segment of medial nasal prominence

Front 10

What forms the premaxillary part of the maxilla?

Back 10

Upper jaw component of intermaxillary segment of medial nasal prominence

Front 11

What forms the primary palate?

Back 11

Palatal component of the intermaxillary segment of the medial nasal prominence

Front 12

What forms the cheek, most of the maxilla, most of the upper lip and secondary palate?

Back 12

Maxillary prominence

Front 13

Where is the furrow where the maxillary prominence fuses with the lateral nasal prominence?

Back 13

Nasolacrimal groove

Front 14

What does the ectoderm in the nasolacrimal groove form?

Back 14

Nasolacrimal sac and duct

Front 15

The external ear develops from mesenchyme of what arches?

Back 15

1st and 2nd

Front 16

When does the palate form and when is the most critical period?

Back 16

Between weeks 5-12, most critical from 6-9

Front 17

Where is the intermaxillary segment dervied?

Back 17

Medial Nasal Prominence

Front 18

What forms the primary palate?

Back 18

Intermaxillary segment of the medial nasal prominence

Front 19

What forms the secondary palate?

Back 19

Fusion of palatine shelves

Front 20

Where are the palatine shelves derived from?

Back 20

Maxillary prominence

Front 21

The Posterior secondary palate has no bone & forms what?

Back 21

the soft palate + uvula.

Front 22

What area of the palate is the last to fuse, around 12 weeks?

Back 22

Uvula

Front 23

HARD PALATE is where and what type of bone?

Back 23

Primary palate and rostral secondary palate: intramembranous bone

Front 24

SOFT PALATE is where and is made of what?

Back 24

Caudal secondary palate: skeletal muscle

Front 25

What marks the fusion of the primary and secondary palates?

Back 25

Incisive Foramen

Front 26

separates the nasal pits from the primitive oral cavity.

Back 26

Oronasal membrane

Front 27

When does the oronasal membrane rupture and what does it form?

Back 27

wk 6 to form PRIMITIVE CHOANAE -- so communication established between nasal and oral cavities.

Front 28

Formation of the SECONDARY PALATE partially separates the nasal and oral cavities.-- leading to formation of the?

Back 28

DEFINITIVE CHOANAE.

Front 29

NASAL SEPTUM from the medial nasal prominences grows down and fuses with the midline region of the definitive palate -- forming the?

Back 29

perpendicular plate of the ETHMOID plus the VOMER.

Front 30

What are the only two sinuses present at birth?

Back 30

maxillary and part of ethmoid

Front 31

What is considered the dividing landmark between anterior and posterior cleft deformities?

Back 31

The incisive foramen

Front 32

Is cleft lip anterior or posterior defect?

Back 32

anterior

Front 33

Is cleft palate an anterior or posterior defect?

Back 33

posterior

Front 34

Anterior defects are due to what?

Back 34

Due to failure of fusion of maxillary prominences with the fused medial nasal prominences.

Front 35

Posterior defects are due to what?

Back 35

Due to failure of fusion of the palatine shelves with one another, with the nasal septum & with the posterior margin of the primary palate.

Front 36

What is more common in females, cleft lip or cleft palate?

Back 36

Cleft palate

Front 37

What increases with increasing maternal age, cleft lip or cleft palate?

Back 37

Cleft lip

Front 38

How does a teratogen produce cleft lip/palate?

Back 38

Interfere with migration of neural crest cells into facial primordia and cause a lack of mesenchyme to work with.