B7-036 Head and Neck Embryology Flashcards
the mesenchymal core of the pharyngeal arches is derived from [2]
mesoderm
neural crest
congenital defects caused by a failure of neural crest cells to migrate to the first pharyngeal arch
neurochristopathy
DiGeorge syndrome is an example of a […] deriving from the 1st pharyngeal pouch
neurochristopathy
CATCH 22 for DiGeorge
Cardiac abnormalities
Abnormal facies
Thymic aplasia
Cleft palate
Hypocalcemia/hypoparathyroidism
deletion of chromosome 22
what gene is associated with DiGeorge syndrome?
TBX 1
the third aortic arch that passes through the 3rd pharyngeal pouch persists as the […]
internal carotid
(and part of the common carotid)
the fourth aortic arch that passes through the 4th pharyngeal pouch persists as the […]
right: subclavian
left: arch of aorta
1st pharyngeal pouch is innervated by
CN V
2nd pharyngeal pouch is innervated by
CN VII
3rd pharyngeal pouch is innervated by
CN IX
4th pharyngeal pouch is innervated by
CN X
1st arch muscles [2]
muscles of mastication
anterior belly of digastric
2nd arch muscles [2]
facial muscles of expression
posterior belly of digastric
3rd arch muscles
stylopharyngeous muscle
4t-6th arch muscles [2]
muscles of pharnyx
muscles of larynx
1st arch cartilage derivatives [3]
Meckel’s cartilage
malleus
incus
2nd arch cartilage derivatives [3]
stapes
styloid process
part of hyoid
3rd arch cartilage derivatives
part of hyoid and greater horn
4th-6th arch cartilage derivatives [2]
thyroid cartilage
cricoid cartilage
the pulmonary artery arises from
5th- 6th arch
the superior parathyroid gland originates from the […] pouch
4th
the inferior parathyroid gland originates from the […] pouch
3rd
the thyroid gland originates from the […] pouch
3rd
the external auditory meatus is derived from
1st pharyngeal cleft