embryology block 4

Question 1

pharyn clefts -

Answer 1

only 1 creates external auditoriy meatus - rest are overgrown the 2nd ARCH

Question 2

First arch- 2 parts

Maxillary artery

CN V -

Muscles of Mastication - + MATT

Skin of face - line mouth, nose, anterior 2/3 tongue - PAIN< ETC not taste

Answer 2

maxillary (dorsal) INCUS

Mandib - ventral - Meckels cargilage - malleus - spenomandibullar lig

Question 3

2nd arch -

2 arteries - Internal CAROTID, Middle meningeal -

Reichert’s

cartilage - VII

TASTE chorda tympani 2/3

Sec - Stapes, Styloid
styloihyoid lig, upper body, lesser horn or hyoid

Answer 3

2 arteries - Stapeldial - (internal carotid, internal maxliary, middle meningeal) 0 regresses

Hyoid - - corticotypmanic in auldt

Muscles of Facial Expression -

plus platypus, poster belly digastric

Question 4

Third - common carotid artery and prox internal carotid

IX-

Pharynx

posterior taste 1/3

Answer 4

lower body, greater horn of hyoid

Pharynx - Stylopharyngeus is a paired muscle that participates in forming the lateral walls of the pharynx. It is one of three longitudinal pharyngeal muscles, the remaining ones being palatopharyngeus and salpingopharyngeus muscles. All three are located internally to the circular pharyngeal constrictor muscles.

Question 5

fourth -

right - subclavian
left - aortic arch

laryngeal cartilage -

X

SUPERIOR laryngeal N of Vagus

Answer 5

constrictors of pharynx, cicothyroid

ROOT of tongue -

Question 6

6th -

art
right - pulm art
left - ductus arteriosos

recurrent laryngeal

Answer 6

innervates larynx BUT cricothyroid

taste epiglottis

sensation throat - part of ear

gag reflex efferent - - w IX

Question 7

pouches

Answer 7

1st Eustachian tube and middle ear cavity

2nd Lining of the palatine tonsils

3rd
Dorsal – Inferior parathyroid glands
Ventral – Thymus

4th
Dorsal – Superior parathyroid glands
Ventral – Ultimobranchial body (C cells)

Question 8

What cranial nerve Innervates the vocal cords?

only muscle innervated by the glossopharygneal nerve - stylopharyngeus

Answer 8

Glossopharyngeal and other Facial Neuralgias

The superior laryngeal nerve, a branch of the vagus nerve, innervates the cricothyroid muscle of the larynx. This muscle stretches, tenses, and adducts the vocal cord

Question 9

potter’s syndrome - oligohydramnios

Answer 9

pulmonary hypoplasia
oligohydramnios
twisted face
twisted skin
extremeity deformation
renal ageneis 

baby can’t pee -