Brachial Arches

Question 1

The first brachial arch has what nerve

Answer 1

Trigenimal Nerve

Question 2

The second brachial arch has what nerve

Answer 2

Facial Nerve

Question 3

Third Brachial Arch has what cranial nerve?

Answer 3

Glossopharyngeal Nerve

Question 4

The fourth brachial arch has what nerve?

Answer 4

Vagus nerve

Question 5

Sixth brachial arch has what nerve?

Answer 5

Accessory

Question 6

First arch forms what skeletal structures

Answer 6

Malleus and incus

Question 7

First arch forms what ligament

Answer 7

Anterior ligament of malleus

Sphenomandibular ligament

Question 8

First arch forms what muscles

Answer 8

Muscles of mastication

Tensor tympani

Tensor Palati

Mylohyoid

anterior belly of digastric

Question 9

Second Branchial arch forms what skeletal structures

Answer 9

Stapes

Styloid process

Hyoid bone-lesser horn, upper half of body

Question 10

Second branchial arch forms what ligaments??

Answer 10

Styloid ligament

Question 11

Second branchial arch forms what muscles

Answer 11

Muscles of facial expression

Stapedius

Stylohyoid

Posterior belly of digastric

Question 12

Third branchial arch forms what skeletal structures

Answer 12

Hyoid bone- greater horn, lower half of body

Question 13

Third branchial arch forms what ligaments

Answer 13

None

Question 14

Third branchial arch forms what muscles

Answer 14

ONly stylopharyngeus

Question 15

Fourth branchial arch forms what skeletal structures

Answer 15

Cartilages of larynx

Question 16

Fourth branchial arch makes what ligament?

Answer 16

None

Question 17

Fourth branchial arch forms what muscles

Answer 17

All muscles of larynx

All muscle of pharynx (except stylopharyngeus)

All muscles of soft palate (except tensor palati)

Question 18

Sixth branchial arch forms what skeletal structures

Answer 18

None

Question 19

Sixth branchial arch forms what ligaments

Answer 19

None

Question 20

Sixth branchial arch forms what muscles

Answer 20

Trapezius

Sternoclastoidmastoid

Question 21

What the first branchial groove become?

Answer 21

External auditory meatus

Question 22

What does the first branchial membrane become?

Answer 22

Tympanic Membrane

Question 23

First branchial pouch forms what structures?

Answer 23

Auditory tube

Tympanic cavity

Question 24

Second branchial pouch forms what?

Answer 24

Linings or crypts of palatine tonsils

Question 25

Third branchial pouch forms what?

Answer 25

Inferior Parathyroid Gland

Thymus

Question 26

Fourth Branchial Pouch forms?

Answer 26

Superior Parathyroid gland

C-cells of thyroid

Question 27

Are the branchial pouch structures innervated by the same nerves as the branchial arches?

Answer 27

No

Question 28

What is the first branchial cleft cyst

Answer 28

Track linked to external auditory meatus and can be problematic

Question 29

What is the second branchial cleft cyst?

Answer 29

Tract linked to tonsillar fossa (palatine tonsils)

Question 30

Third branchial cleft cyst?

Answer 30

Tract at thyrohyoid membrane or piriform recess

Question 31

What is the pyramidal lobe?

Answer 31

In 50% of people
Congenital malformation of thyroid gland
Lobe can be attached to hyoid bone by fibrous strand

No clinical problems

Question 32

Persistent Thyroglossal Duct Remnants

Answer 32

Part of duct can remain and form thyroglossal cysts from foramen cecum of tongue to throne gland in neck

Cysts found in midline of neck and can be located anterior to hyoid bone or larynx

Question 33

Stomodeum

Answer 33

Formed by ectoderm

Formal oral cavity and nasal cavity

Contacts endoderm at oropharyngeal membrane