Pharyngeal Arches

Question 1

Which nerve is the first arch derived from?

Answer 1

Trigeminal

Question 2

What two arteries come from arch 6?

Answer 2

• Ductus arteriosus
• Pulmonary arteries

Question 3

What is this a derivative of?

Laryngeal cartilages

Answer 3

4 and 6

Question 4

• 3rd arch artery forms part of the ______

Answer 4

common carotid artery

Question 5

What bone forms around meckel’s cartliage?

Answer 5

Mandible

Question 6

What muscles are these muscles derived from?

• Mastication: temporalis, masseter, medial and lateral pterygoids
• Mylohyoid
• Ant Belly of Digastric
• Tensor Veli Palatini
• Tensor Tympani

Answer 6

Arch 1: Mandibular

Question 7

What is the first medodermal derivative to appear?

Answer 7

Aoritc arch artery

Question 8

What artery comes from the first arch?

Answer 8

Maxillary

Question 9

What are some derivatives of Meckel’s caritlage?

Answer 9

Question 10

What arch is this muscle a derivative of?

• Stylopharyngeus

Answer 10

3rd

Question 11

What arch are these anomalies of?

• Congenital laryngeal stridor
• Laryngomalacia
  
  • malformed larynx
  • weak larynx muscles
  • stridor- high pitched sound during inspiration

Answer 11

4 and 6

Question 12

• 4th arch artery forms ______

Answer 12

arch of the aorta

Question 13

What two arteries are derivatives of pharngeal arch 4?

Answer 13

Aortic arch

R subclavian

Question 14

What nerve is the 2nd pharngeal arch formed from?

Answer 14

Facial nerve

Question 16

What are these examples of?

Answer 16

Branchial cysts and fistulas

Question 17

In 4th pouch derivatives what body fuses with the thyroid gland and contributes parafollicular cells that produce calcitonin, a hormone that regulates calcium levels

Answer 17

Utimobranchial body

Question 18

What nerve is the 3rd pharngeal arch a derivative of?

Answer 18

Glossopharyngeal

Question 19

What arch are these anomalies from?

• Hyoid malformation
• Muscular asymmetry of the face
• Conductive hearing loss
  
  • malleus, incus, stapes defects
• Microtia

Answer 19

2nd arch

Question 20

What arch forms from the maxillary and mandibular prominence?

Answer 20

Arch 1

Question 21

What artery is from the 3rd pharngeal arch?

Answer 21

Common and internal carotid

Question 22

What pouch are these derivatives of?

• Tympanic cavity
• pharygotympanic tube
• mastoid antrum

Answer 22

Pouch 1

Question 23

What arch are these derived from:

Intrinsic laryngeal muscles

Answer 23

Arch 6

Question 24

The hindbrain is “segmented” into compartments called

Answer 24

rhombomeres

Question 25

What is the membrane where pouches meet clefts?

Answer 25

Pharngeal membranes Made of ecto and edoderm

Question 26

What arch are these muscles a derivative of? * Pharyngeal constictors * cricothyroid * levator veli palatini

Answer 26

4

Question 27

Anonamilies that primarily affect blood vessels comes from which arch?

Answer 27

3rd because of common carotid artery

Question 28

What pouch are these derivatives of? * Palatine (tonsillar) fossa * largely obliterates pouch * tonsilar sinus * depression between the palatoglossal and palatopharngeal arches

Answer 28

Pouch 2

Question 29

What arch are these muscles derived from: * Facial expression * post belly of digastric * stylohyoid * stapedius

Answer 29

2nd arch: Hyoid

Question 30

What artery comes from the second pharngeal arch?

Answer 30

Stapedial

Question 31

What pouch are these derivatives of? * inferior parathyroid glands * thymus

Answer 31

Pouch 3

Question 32

What arch are these bones derivived from? * Stapes * Styloid process * stylohyoid lig * lesser horn and upper body of hyoid bone

Answer 32

2nd arch: Hyoid

Question 33

What arch are these parts of the skeleton derived from? * Maxilla * Mandible * Greater wing of sphenoid * Zygomatic bone (squamous part) * Temoral bone * Meckel's cartilage * Ant. Lig. of malleus * Sphenomandibular ligament * Incus * Malleus

Answer 33

Arch 1: Mandibular

Question 34

What nerve is the 6th arch a derivative of?

Answer 34

Vagus (inferior and recurrent laryngeal)

Question 35

What arch are these abnormalities from? * Malformations of eyes, ears, palate and mandible * critical period is week 6-7 * abnormalities are symmetrical and bilateral * Failure of neural crest cell migration leads to defects or loss of musculoskeletal derivatives

Answer 35

Arch 1

Question 36

What is this syndrome?

Answer 36

DiGeorge Syndrome

Question 37

What is this syndrom?

Answer 37

Treacher Collins Syndrome

Question 38

• 6th arch artery forms \_\_\_\_\_\_

Answer 38

pulmonary artery

Question 39

What separates arches on the endodermal (inner side)?

Answer 39

Pharngeal pouches

Question 40

What nerve is the 4 arch a derivative of?

Answer 40

Vagus (superior laryngeal)

Question 41

What pouch are these derivatives of? * superior parathyroid glands * parafollicular cells of thyroid

Question 42

What arch are these bones a derivative of? * greater and lower body of hyoid bone

Answer 42

3rd

Question 43

What seperates arches on the ectodermal (outer) side?

Answer 43

clefts