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
the cervical sinus is derived from
pharyngeal clefts 2,3,4
the tympanic cavity and auditory tube are derived from
1st pharyngeal pouch
the palatine tonsils are derived from
2nd pharyngeal pouch
fistulas/cysts derived from pharyngeal misdevelopment of the cervical sinus will be […] in the neck
lateral
thyroglossal cysts appear in the […] of the neck
midline
what pharyngeal arch does the anterior 2/3 of the tongue derive from?
1st
what pharyngeal arch does the posterior 1/3 of the tongue derive from?
3rd
what pharyngeal arch does the base of the tongue derive from?
4th