Neuro Clhn Lect #9

Front 1

Externally, the ridges are separated from each other by what?

Back 1

Pharyngeal clefts

Front 2

Internally, these structures grow out toward the clefts and are lined with endoderm?

Back 2

Pharyngeal pouches

Front 3

What are the 5 pharyngeal arches?

Back 3

1,2,3,4,6

Front 4

The 1st pharyngeal arch forms two processes, what are they?

Back 4

Maxillary and mandibular

Front 5

Which two aortic arches essentially regress?

Back 5

The 1st two

Front 6

Muscles of mastication, such as the mylohyoid, anterior belly of the digastric, tensor tympani, and tensor veli palatini (MMATT) are part of which pharyngeal arch?

Back 6

1

Front 7

Pharyngeal arch 2 is associated with which cranial nerve?

Back 7

CN7

Front 8

Pharyngeal arch 3 is a derivative of this muscle, which is innervated by the glossopharyngeal nerve?

Back 8

stylopharyngeus

Front 9

Levator veli palatini, and the superior laryngeal branch of CNX are derivatives of this pharyngeal arch?

Back 9

4

Front 10

All laryngeal muscles arepart of this pharyngeal arch, except the cricothyroid?

Back 10

6

Front 11

The pneumonic FESSP is associate with pharyngeal arch 2, what does it stand for?

Back 11

Muscles of facial expression, stapedius, stylohyoid, posterior belly of the digastric

Front 12

By definition, what are the nerve fibers supplying muscles derived from pharyngeal arches classified as?

Back 12

SVE , special visceral efferent

Front 13

Facial skeleton is derived from neural crest cells, so failure of migration of neural crest cells will likely result in what clinical finding?

Back 13

facial deformity

Front 14

This is the only pharyngeal cleft to persist in recognizable form as an adult, giving us our external acoustic meatus?

Back 14

1

Front 15

Tissues surrounding the first cleft arising from both arches 1 and 2 will give us what part of the ear?

Back 15

Auricle

Front 16

What will form the eardrum?

Back 16

the tissue (opposed ecto and endo with a little mesoderm) between the 1st cleft and 1st pouch

Front 17

This arch will overgrow neighboring clefts and result in a cervical sinus?

Back 17

Arch 2

Front 18

A rare cyst or opening to the skin at the anterior border of the sternocleidomastoid is a result of what?

Back 18

Persistance of the cervical sinus (normally it is closed over and obliterated)

Front 19

This pouch forms tonsillar crypts?

Back 19

Pouch 2

Front 20

This pouch will form the superior parathyroids?

Back 20

Pouch 4

Front 21

This pouch will migrate and result in the future secretion of calcitonin from the thyroid gland?

Back 21

Pouch 5

Front 22

This pouch will form the inferior parathyroids and the thymus?

Back 22

Pouch 3

Front 23

This pouch will form the middle ear cavity and the auditory tube?

Back 23

Pouch 1

Front 24

In the process of forming this structure, two lateral swellings from the floor of the pharynx overgrow a midline tuberculum impar.

Back 24

Anterior 2/3 of the tongue

Front 25

The posterior 1/3 of the tongue comes from this, a tissue derived from the 2nd, 3rd, and 4th arches?

Back 25

Copula

Front 26

The Anterior 2/3 of the tongue recieves its innervation from the nerve of the 1st arch, what is it?

Back 26

Mandibular division of CN 5

Front 27

The Posterior 1/3 of the tongue recieves its innervation from the nerve of the 3rd arch, which is?

Back 27

Glossopharyngeal Nerve (CN 9)

Front 28

The thyroglossal duct represents the track that the thyroid takes to descend, where does it descend from?

Back 28

Foramen cecum fo the tongue

Front 29

What are the 5 prominences that the face begins development as?

Back 29

one frontonasal, two maxillary, two mandibular

Front 30

Merging of the left and right one of these leads to the formation of the lower jaw?

Back 30

mandibular process

Front 31

The bridge of the nose, philtrum of the lip and the nasal septum form as the result of merging of thes two prominences?

Back 31

Medial nasal prominences (formed around a pair of ectoderman nasal placodes)

Front 32

Adult nasolacrimal ducts, know for tears, is caused by the merging of what structures?

Back 32

The maxillary prominence and it's ipsilateral lateral and medial nasal prominence

Front 33

The cheeks are formed by the merging of these two prominences?

Back 33

Lateral maxillary and mandibular prominences

Front 34

Hare lip results from a failure of what two things to fuse?

Back 34

Maxillary prominence and medial nasal prominence

Front 35

A patient comes in with underdeveloped zygomatic and mandibular bones along with malformed external ears, what is her diagnosis?

Back 35

Treacher-Collins

Front 36

Patient comes in with a small jaw, cleft palate and a posteriorly placed tongue, what is his likely diagnosis?

Back 36

Pierre-Robin

Front 37

Neuronal cells in the newly formed nasal pits will become which cranial nerve?

Back 37

CN 1 (they will sprout axons through the cribiform plate to the olfactory bulb)

Front 38

A downgrowth from the frontonasal and fused medial nasal prominences will form this midline structure in an adult nose?

Back 38

Nasal septum

Front 39

Failure of fusion of these structures will lead to a cleft palate?

Back 39

Maxillary prominences meeting each other, the primary palate (from the intermaxillary segment of the fused nasal prominences), and the nasal septum