Embryology Flashcards
Muscles of mastication
1st arch
CN V2 and V3
1st arch
Meckel’s cartilage: mandible, malleus, incus, spheno-mandibular ligament
1st arch
Stapes, styloid process, stylohyoid ligament, lesser horn of hyoid
2nd arch
muscles of facial expression
2nd arch
CN VII
2nd arch
greater horn of hyoid
3rd arch
stylopharyngeus muscle
3rd arch
CN IX
3rd arch
thyroid, cricoid, arytenoids, corniculate, cuneiform
4th-6th arch
pharyngeal constrictors, cricothyroid, levator veli palatini
4th arch
all intrinisic muscles of larynx
6th arch
CN X (superior laryngeal branch)
4th arch
CN X (recurrent laryngeal branch)
6th arch
develops into middle ear cavity, eustachian tube, mastoid air cells
1st pouch
epithelial lining of palatine tonsil
2nd pouch
inferior parathyroids and thymus
3rd pouch (dorsal wings=inferior parathyroids, ventral wings=thymus)
superior parathyroids
4th pouch
develops into external auditory meatus
1st cleft
temporary cervical sinuses
2-4 clefts
persistent cervical sinus
branchial cleft cyst within lateral neck
