Development Of Face

Question 1

facial primoridia appear early in the—— week around——-

Answer 1

fourth

primoridal stomodeum

Question 2

primoridal stomodeum is also known as——-??

Answer 2

Primitive mouth

Question 3

5 facial primoridia appear as—— around the——.

List them

Answer 3

prominences

stomodeum

the single frontonasal prominence

the paired maxillary prominences

the paired mandibular prominences

Question 4

Derivatives of the single frontonasal prominence

Answer 4

(Forehead, nose, nasal cavity,Philtrum of upper lip,nasal septum)

Question 5

Derivatives of the paired maxillary prominences

Answer 5

(Lateral part of upper lip,upper part of cheek)

Question 6

Derivatives of the paired mandibular prominences

Answer 6

(Chin, lower lip, lower parts of cheek)

Question 7

the paired facial prominences are derivatives of the—— of pharyngeal arches

Answer 7

first pair

Question 8

the prominences are produced mainly by the proliferation of—- that migrate from the——- and——- regions of the ——and into the pharyngeal arches during the—— week

Answer 8

neural crest cells

mesencephalon

rhombencephalon

neural folds

fourth

Question 9

rhombencephalon also known as

Answer 9

Hind Brain

Question 10

NASAL PLACODES appear by——

Answer 10

end of fourth week

Question 11

NASAL PLACODES are 2 bilateral oval thickenings of the ——of the——- prominence

Answer 11

surface of the ectoderm

frontonasal

Question 12

Nasal placodes are the primoridia for the——- and——

Answer 12

nose

nasal cavities

Question 13

initially nasal placodes are—-, then they stretch to produce a—- in each placode by——-

• )——in the margins of the placode proliferates,producing——— shaped elevations called—— and—— prominences
• )depression between the 2 prominences is called ‘——-’ which is continuous with the stomodeum below

Answer 13

convex

flat depression

invaginating into the underlying mesoderm

horse-shoe

medial; lateral

nasal pit

Question 14

__ is the primordia for nostrils

Answer 14

Nasal pits

Question 15

———are the main source of the connective tissue components like muscles , cartilage, bone , and ligaments in the facial and oral region

Answer 15

mesenchymal cells

Question 16

median nasal process thins out gradually to form ——-

Answer 16

primitive nasal septum.

Question 17

globular processes of—— nasal processes fuse to form ——-

Answer 17

medial

philtrum of the upper lip.

Question 18

the paired maxillary prominences form the——— boundaries of the——

Answer 18

primitive mouth

Question 19

the paired mandibular prominences makeup the—— boundary of the——

Answer 19

caudal

primitive mouth

Question 20

between the—- and—— weeks, the 2 medial nasal prominences merge with each other and with the maxillary and lateral nasal prominences

Answer 20

7th

8th

Question 21

merging of medial nasal and maxillary prominences forms the continuity of—— and—— and seperation of—— from——

Answer 21

upper jaw

upper lip

nasal pit

stomodeum

Question 22

The surface opening of stomodeum forms the ———. Lateral angles of it are formed by fusion of—— and—— processes.

Answer 22

oral fissure

maxillary

mandibular

Question 23

sensory innervation of upper lip is derived from——- nerves.

Answer 23

maxillary

Question 24

——-nerve supplies the parts gotten from the frontonasal prominence

Answer 24

opthalamic division of trigeminal

Question 25

——and——- are first parts of the face to form

Answer 25

lower jaw lower lip

Question 26

Lower jaw and lip result from merging of the—— ends of the—— prominences in the—— plane

Answer 26

medial mandibular median

Question 27

each lateral nasal prominence is seperated from the——- prominence by a cleft called——— that is lined with——- cells

Answer 27

maxillary nasolacrimal groove ectodermal

Question 28

Thickening of the—— cells that line the nasolacrimal groove forms the——- that detaches from the—— and sink in the—- and gets recanalized to form the———

Answer 28

ectodermal ectodermal cord ectoderm mesoderm nasolacrimal duct

Question 29

Upper end of nasolacrimal duct widens to form the——-

Answer 29

lacrimal sac.

Question 30

The nasolacrimal duct becomes completely patent only ——-and communicates with ——caudally and with——- cephalically

Answer 30

after birth nasal cavity conjunctival sac

Question 31

In adults the nasolacrimal duct runs from ———to——-

Answer 31

medial angle of the eye inferior meatus of the nasal cavity

Question 32

inferior meatus of the nasal cavity is an air passage located between ——and——-

Answer 32

inferior nasal concha lateral nasal wall

Question 33

——-forms the bridge of the nose. ——-form dorsum and tip of the nose. ———-form sides and alae of the nose.

Answer 33

The frontonasal process Two fused medial nasal processes Two lateral nasal processes

Question 34

Intermaxillary Segment of Face is formed by——

Answer 34

fusion of the medial nasal processes

Question 35

Intermaxillary Segment of Face has 3 components. Labial component that forms the——- -Upper jaw component that forms the ——- -Palatal component that forms ———

Answer 35

philtrum of the upper lip (alveolar process) that carries four incisor teeth. triangular primary palate (also called premaxilla).

Question 36

The primary palate develops from the——— and secondary palate develops from the——-

Answer 36

frontonasal process maxillary processes.

Question 37

Cleft lip commonly occurs in the—- lip

Answer 37

upper

Question 38

Cleft lip occurs—— births and 60–80% of children involved are what gender??

Answer 38

1 in 1000 males.

Question 39

cleft upper lip presents three varieties.List them

Answer 39

Unilateral cleft lip Bilateral cleft lip Central cleft lip

Question 40

Central cleft lip is also called???

Answer 40

Hair lip

Question 41

Unilateral cleft lip occurs due to failure of—- Bilateral cleft lip occurs due to failure of—— hair lip occurs due to failure of——-

Answer 41

fusion of maxillary process with the medial nasal process of the same side fusion of maxillary processes with the frontonasal process. development of philtrum of the upper lip from the frontonasal process.

Question 42

Lower cleft lip is Very—- and is due to——-

Answer 42

rare the two mandibular processes may fail to fuse in the midline

Question 43

oblique facial cleft aka ——?

Answer 43

orbitofacial fissure

Question 44

oblique facial cleft. Rare or common

Answer 44

Rare

Question 45

oblique facial cleft occurs when——

Answer 45

maxillary process fails to fuse with the lateral nasal process.

Question 46

The orbitofacial fissure extends from—— to the——. Making the nasolacrimal duct——-

Answer 46

medial angle of the eye upper lip. exposed to the exterior.

Question 47

oblique facial cleft. Usually bilateral or unilateral

Answer 47

Bilateral

Question 48

Microstomia and macrostomia basically mean——?

Answer 48

small and large mouth

Question 49

Initially the lateral angle of mouth extends—— - Subsequently in normal conditions the angles of mouth gradually shift—- by fusion between the—- and—— processes till normal adult position is reached.

Answer 49

much laterally close to auricle. medially maxillary; mandibular

Question 50

The excessive fusion of the mandiblular and maxillary processes lead to —— - arrest of this fusion leads to——.

Answer 50

microstomia macrostomia

Question 51

Most common cleft lip is——- | -Most rare cleft lip is——

Answer 51

unilateral cleft of upper lip median cleft of lower lip

Question 52

Commonest cause of cleft lip with or without cleft palate is——- which is a combination of—- and—— factors)

Answer 52

Multifactorial inheritance genetic environmental

Question 53

Examples of first arch syndromes include ____ syndrome and _____ syndrome.

Answer 53

Treacher Collins Pierre Robin