Branchial/Pharyngeal Arch Derivatives Flashcards
1
Q
1st arch cartilage: (5)
A
- Meckel cartilage
- Mandible
- Malleus
- Incus
- Spheno-Mandibular ligament
2
Q
1st arch muscles (5)
A
- Muscles of mastication (temporalis, masseter, lateral and medial pterygoids)
- Mylohyoid
- Tensor tympani
- Tensor veli palantini
- Anterior 2/3 of the tongue
3
Q
1st arch nerves (2)
A
V1 and V2
4
Q
1st arch pathology (1)
A
Treacher Collins syndrome: 1st arch neural crest fails to migrate –> mandibular hypoplasia and facial abnormalities
5
Q
2nd arch cartilage (4)
A
- Stapes
- Styloid process
- Stylohyoid ligament
- Lesser horn of Hyoid
6
Q
2nd arch muscles (3)
A
- Muscles of facial expression
- Stapedius
- Stylohyoid
7
Q
2nd arch nerves (1)
A
CN VII
8
Q
3rd arch cartilage (1)
A
- Greater horn of hyoid
9
Q
3rd arch muscle (1)
A
Stylopharyngeus
10
Q
3rd arch nerve (1)
A
CN IX (glossopharyngeal)
11
Q
2nd arch pathology (1)
A
Congenital pharyngo-cutaneous fistula: persistence of cleft and pouch –> fistula between tonsillar area and lateral neck
12
Q
4th-6th arch cartilage (2)
A
- Thyroid
2. Cricoid
13
Q
4th arch muscles (3)
A
- Most pharyngeal constrictors
- CRICOTHYROID
- Levator veli palantini
14
Q
6th arch muscles (1)
A
- All intrinsic muscles of larynx EXCEPT cricothyroid
15
Q
4th arch nerve
A
CN X –> superior laryngeal nerve (branch of vagus)
