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Flashcards in Pharyngeal Arches Deck (56)
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1

pharyngeal cleft

external invagination of ectoderm
-4 clefts

2

pharyngeal arches

core of mesenchyme
neural crest and paraxial mesoderm

each has own nerve and blood supply

6 total
#5 regresses

3

neural crest

CT components

4

paraxial mesoderm

gives rise to muscles

5

pharyngeal pouches

internal evagination of pharyngeal endoderm
-4 pouches

6

arch 1

trigeminal

7

arch 2

facial

8

arch 3

glossopharyngeal

9

arch 4

vagus

10

arch 5

mostly regresses

11

arch 6

vagus - mostly recurrent laryngeal branch

12

arch nerves

only ones with an SVE component**

13

sensory info to face

trigeminal nerve

14

divisions of pharyngeal arch 1

frontal prominence
maxillary process
mandibular ??

15

bones of arch 1

viscerocranium and malleus and incus

also CT of face and dermis

16

muscles of arch 1

muscles of mastication - temporalis, masseter, medial, lateral pterygoids)

also tensor tympani, tensor veli palatini, mylohyoid, anterior belly of digastric

17

bones of arch 2

stapes
styloid process of temporal bone
stylohyoid ligament, lesser horn and superior portion of body of hyoid

18

muscles of arch 2

muscles of facial expression
also stapedius, stylohyoid, posterior belly of digastric

19

facial nerve

nerve VII
arch 2

20

bones of arch 3

greater horn and inferior portion of hyoid bone

21

muscles of arch 3

stylopharyngeus

only pharynx muscle not innervated by vagus

22

glossopharyngeal nerve

CN IX

arch 3

23

bones of arch 4

with 6th arch - form all laryngeal cartilages

24

arch 4 and 6

form laryngeal cartilages

25

muscles of arch 4

muscles of pharynx
cricothyroid (in larynx)

26

vagus nerve

CN X

arch 4

27

trigeminal nerve

nerve V
arch 1

28

arch 6 bones

laryngeal cartilage (with arch 4)

29

arch 6 muscles

laryngeal muscles (except cricothyroid)
skeletal muscles of esophagus

30

vagus nerve - recurrent laryngeal branch

CN X

arch 6