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Flashcards in Brachial pharyngeal apparatus Deck (11):
1

What is Cleft, Art, Pouch derived from

Cleft= ectoderm
Arches= mesoderm +neural crest
Puches= endoderm

2

1st Cleft develops into

External auditory meatus

3

2nd, 3rd, 4th cleft develops into

temporary cervical sinus

4

Failure of obliteration of pharyngeal cyst

Pharyngeal cleft cyst
Lateral neck
immobile w/ swallowing

5

How to distinguish pharyngeal cyst from thyroglossal duct cyst

Thyroglossal duct cyst: moves w/ swallowing, midline

Pharyngeal cleft cyst : Lateral neck, immobile w/ swallowing

6

1st pharyngeal pouch

Middle ear
eustachian tubes
Mastoid air cells

7

2nd pharyngeal pouch

epithelial lining of tonsils

8

3rd pharyngeal pouch

inferior parathyroid glands
Thymus

9

4th pharyngeal poud

Superior parathyroid glands

10

DiGeorge syndrome

no 3rd or 4th pharyngeal pouch
thymic aplasia
T cell deficiency
hypocalcemia

11

1st Arch

M's & T's
Cartilage: Mecekl's cartilage: mandible, mandibular ligament, malleus & incus

Muscle: Muscles of Mastication: masseter, medial pterygoid, lateral pterygoid, Temporalis