Aortic/Branchial arch derivatives

Question 1

1st Aortic Arch

Answer 1

Maxillary artery (1st arch is maximal)

Question 2

1st Branchial Arch Cartilage derivative

Answer 2

Meckel cartilage (Mandible malleus, incus, spheno-mandibular ligament)

Question 3

1st Branchial arch muscle derivatives

Answer 3

Muscles of Mastication (Masseter, temporalis, medial pterygoids)
Myelohyoid
Tensor tympani tensor veli palatini

Question 4

1st Branchial arch Nerve derivatives

Answer 4

CN V2 and V3

Question 5

1st Branchial Arch abnormalities

Answer 5

Treacher Collins syndrome (Mandibular hypoplasia, facial abnormalities)

Question 6

2nd aortic arch

Answer 6

Stapedial artery and hyoid artery (Second=Stapedial)

Question 7

3rd Aortic Arch

Answer 7

Common Carotid artery and proximal internal Carotid (C is third letter)

Question 8

4th Aortic Arch

Answer 8

Left aortic arch, right proximal part of right subclavian

4th arch 4 limbs, so systemic

Question 9

6th Aortic Arch

Answer 9

Proximal part of pulmonary arteries and ductus arteriosis

Question 10

1st Branchial Cleft

Answer 10

External auditory meatus

Question 11

2nd-4th Branchial cleft

Answer 11

Temporary cervical sinuses

Question 12

Second branchial arch cartilage derivatives

Answer 12

Reichert cartilage (Stapes, styloid process, hyoid lesser horn, stylohoid ligament)

Question 13

Second branchial arch muscles derivatives

Answer 13

Stapedius, Stylohyoid, platySma, posterior belly of digastric

Question 14

Second branchial arch nerve derivatives

Answer 14

CN VII

Question 15

Second branchial arch abnormalities

Answer 15

Congenital pharyngocutaneous fistula (fistula between tonsillar area and lateral neck)

Question 16

Third branchial arch cartilage derivatives

Answer 16

Greater horn of hyoid

Question 17

Third branchial arch Muscles derivatives

Answer 17

Stylopharyngeus (pharynx)

Question 18

Third branchial arch nerve derivatives

Answer 18

CN IX (glossoPHARYNgeal, pharynx)

Question 19

4th-6th branchial arch cartilage derivatives

Answer 19

Thyroid, cricoid, arytenoid, corniculate, cuneiform

Question 20

4th-6th branchial arch muscle derivatives

Answer 20

4th: Pharyngeal constrictors, levator veli palatini
6th: All intrinsic larynx muscles

Question 21

4th-6th branchial arch nerve derivatives

Answer 21

4th: CNX: Superior laryngeal swallow
6th: CNX: recurrent laryngeal

Question 22

1st Branchial pouch

Answer 22

Middle ear cavity, eustation tube, mastoid air cells

Question 23

2nd branchial pouch

Answer 23

Epithelial lining of palatine tonsil

Question 24

3rd branchial pouch

Answer 24

Dorsal wings: Inferior parathyroids

Ventral wings: Thymus

Question 25

4th branchial pouch

Answer 25

Superior parathyroids