Aortic/Branchial arch derivatives Flashcards
1st Aortic Arch
Maxillary artery (1st arch is maximal)
1st Branchial Arch Cartilage derivative
Meckel cartilage (Mandible malleus, incus, spheno-mandibular ligament)
1st Branchial arch muscle derivatives
Muscles of Mastication (Masseter, temporalis, medial pterygoids)
Myelohyoid
Tensor tympani tensor veli palatini
1st Branchial arch Nerve derivatives
CN V2 and V3
1st Branchial Arch abnormalities
Treacher Collins syndrome (Mandibular hypoplasia, facial abnormalities)
2nd aortic arch
Stapedial artery and hyoid artery (Second=Stapedial)
3rd Aortic Arch
Common Carotid artery and proximal internal Carotid (C is third letter)
4th Aortic Arch
Left aortic arch, right proximal part of right subclavian
4th arch 4 limbs, so systemic
6th Aortic Arch
Proximal part of pulmonary arteries and ductus arteriosis
1st Branchial Cleft
External auditory meatus
2nd-4th Branchial cleft
Temporary cervical sinuses
Second branchial arch cartilage derivatives
Reichert cartilage (Stapes, styloid process, hyoid lesser horn, stylohoid ligament)
Second branchial arch muscles derivatives
Stapedius, Stylohyoid, platySma, posterior belly of digastric
Second branchial arch nerve derivatives
CN VII
Second branchial arch abnormalities
Congenital pharyngocutaneous fistula (fistula between tonsillar area and lateral neck)