Brachial Apparatus High Yield Flashcards
What are brachial clefts derived from?
ectoderm
What do brachial arches arise from?
mesoderm (muscles, arteries) and Neural crest (bones, cartilage)
What do brachial pouches arise from?
endoderm
External auditory meatus is a derivative of….
1st brachial cleft
What allows for a brachial cleft cyst within lateral neck?
persistent cervial sinus
Mandible is derived from…
1st brachial arch
What are the nerves associated with the 1st brachail arch?
V2 and V3
Stapes is derived from…
2nd brachial arch
Malleus is derived from…
1st brachial arch
Nerves associated with 3rd brachial arch?
CN IX
Thyroid cartilage is derived from…
4th-6th brachial arches
Nerves associated with the 2nd brachial arch?
CN VII
Mandibular ligament is derived from…
1st brachial arch
Stylohoid is derived from…
2nd brachial arch
Cricoid cartilage is derived from…
4th- 6th brachial arch
What nerve is associated with the 4th brachial arch?
CN X–> superior laryngeal branch (swallow)
What nerve is associated with the 6th brachial arch?
CN X–> recurrent laryngeal branch (speak)
The intrinsic muscle of the larynx (except cricothyroid) is derived from….
the 6th brachial arch
The lesser horn of the hyoid is derived from…
the 2nd brachial arch
The muscles of mastication are derived from…
the 1st brahcial arch
What is the stylopharngeus muscle derived from?
3rd brachial arch
What is the tensor tympani derived from?
1st brachial arch
What is treacher collins syndrome?
1st arch neural crest fails to migrate–> mandibular hypoplasia, facial abnormalities
Levator veli palatini is derived fro…
4th brachail arch
