Stephens Embryo lecture Flashcards Preview

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Flashcards in Stephens Embryo lecture Deck (54):
1

CN of Arch 1

trigeminal

2

Skeletal of Arch 1

malleus, incus, maxilla, mandible, meckels

3

Muscle of Arch 1

muscles of mastication

4

CN of Arch 2

Facial nerve

5

Skeletal of Arch 2

reichert's cartilage, stapes, upper hyoid bone, lesser cornu

6

Muscle of Arch 2

facial expression

7

CN of Arch 3

Glossopharyngeal

8

Skeletal of Arch 3

greater cornu, lower hyoid

9

Muscle of Arch 3

stylopharyngeus

10

CN of Arch 4

Vagus

11

Skeletal of Arch 4

laryngeal and thyroid cartilage

12

Muscle of Arch 4

pharyngeal and laryngeal mm.

13

Pharyngeal pouch 1

eustation tube, tympanic membrane, and external acoustic meatus

14

Pharyngeal pouch 2

tonsils, root of tongue

15

Pharyngeal pouch 3

inferior parathyroid, thyroid

16

Pharyngeal pouch 4

superior thyroid

17

Cranioschisis

failure of occipital and parietal bones to form or close

18

Microcephaly

small cranium due to early fusion of cranial sutures

19

Macrocephaly

enlarged cranium secondary to hydrocephaly from early fusion of superior cranial sutures

20

Apert Syndrome

premature fusion of coronal sutures
"tower skull"
associated with fetal alcohol syndrome

21

Cleft chin

mandibular prominences partially or completely fail to fuse

22

Anterior cleft deformity

failure of medial nasal and maxillary swelling to fuse

23

Posterior cleft deformity

failure of palatine shelves to fuse

24

Cleft lip

anterior deformity, more common in males

25

Cleft palate

posterior deformity, more common in females

26

Oblique facial cleft

failure of maxillary swelling to fuse with lateral nasal swelling (palatine shelves)

27

What is exposed with an oblique facial cleft

nasolacrimal duct

28

Median cleft lip and bifid nose

failure of medial nasal prominences to fuse

29

Macrostomia and microstomia

dysfunction of maxillary and mandibular swelling

30

Agathnia

dysgenesis of mandibular swelling

31

Neurocranium

first 10 weeks
cradles the skull

32

Viscerocranium- cartilaginous

forms brachial arches

33

Viscerocranium- membranous

forms maxillary and mandibular processes of arch #1

34

Stomodeum origin

ectoderm

35

Stomodeum function

demarkation of anterior 2/3 of oral cavity vs posterior 1/3 of oral cavity

36

Facial Swellings

frontal prominence, maxillary prominence, and mandibular prominence

37

Frontal prominence

forms forhead, dorsum and apex of nose
forms nasal placodes

38

Nasal placodes form..

form medial and lateral nasal prominence

39

Medial nasal prominence

forms medial nose, upper lip, and philtrum

40

Lateral nasal prominence

alae of nose

41

Maxillary prominence

forms lateral part of upper lip, lateral jaw, and secondary palate

42

Nasolacrimal groove

oblique furrow formed between lateral nasal prominence and maxillary prominence

43

Mandibular prominence

forms lower jaw and lower lip

44

Mimetic muscles

muscles of facial expression from arch 2 that invade arch 1 swellings

45

Nose formation

nasal palcodes --> nasal pits --> nasal sac

46

Nasal sac

primitive nasal cavity

47

Oronasal membrane

separates primitive nasal cavity from primitive oral cavity

48

What does oronasal membrane breakdown into

primitive choanae

49

Intermaxillary process

forms nasal septum and primary palate

50

How is intermaxillary process formed

fusion of medial and nasal prominences

51

Primary palate

forms upper lip

52

How is primary palate formed

from deep portions of intermaxillary process

53

Incisive foramen

boundary between primary and secondary palate and distinguishes between anterior and posterior cleft deformities

54

How is secondary palate formed

formed by palatine shelves (lateral palatine processes)
Shelves fuse with each other and form secondary palate