Dissection 14

Question 1

What layers is the tympanic membrane made from?

Answer 1

Endoderm, mesoder, and ectoderm

Question 2

What ear structures are derived from arch 1

Answer 2

the malleus, incus and tensor tympani

Question 3

What ear structures are derived from arch 2

Answer 3

The stapes and stapedus

Question 4

Which bone structure do you find the internal auditory meatus in?

Answer 4

The petrous

Question 5

What makes ear wax?

Answer 5

The ceruminous glands

Question 6

What CNs innervate the external inner ear?

Answer 6

VII, V3 (auiculotemporal) MAJOR, CN IX and X

Question 7

The outside of the tympanic membrane is innervated by

Answer 7

V3 (major), VII, and X

Question 8

The inside of the tympanic membrane is innervated by?

Answer 8

IX

Question 9

_____ is connected to the stapes and leads to the inner ear

Answer 9

Oval window

Question 10

Every time the stapes pushes into the oval window, the membrane of the _______ bulges out into the middle ear

Answer 10

Round window

Question 11

What nerve runs next to the auditory canal?

Answer 11

Tensor Tympani

Question 12

The Stapedius is embedded in?

Answer 12

The mastoid process

Question 13

The tensor tympani gets innervation for CN ____ and attaches to the ____

Answer 13

V3; malleus

Question 14

The Stapedius gets innervation from CN _____ and attaches to the _____

Answer 14

VII; Stapes

Question 15

What nerve runs between the malleus and the incus?

Answer 15

The chorda tympani

Question 16

The chorda tympani exits through?

Answer 16

The petrotympanic fissure

Question 17

What does the Chorda tympani carry?

Answer 17

Preganglionic parasympathetics and special viscerosensory

Question 18

The Tympanic plexus lies on top of?

Answer 18

The Promontory of the medial wall of the middle ear

Question 19

The Facial Nerve carries special viscerosensory to?

Answer 19

the anterior 2/3 of the tongue

Question 20

The facial nerve carries parasympathetics to?

Answer 20

The lacrimal gland and glands in the oral and nasal cavities

Question 21

The Branchiomotor branch of CN VII innervates?

Answer 21

The muscles of facial expression and the stapedius

Question 22

What nerves make up the nerve of the pterygoid canal?

Answer 22

The Greater petrosal nerve (parasympathetics) and the deep petrosal nerve (sympathetics)

Question 23

What travel through the optic canal?

Answer 23

The optic nerve and ophthalmic artery

Question 24

What bones make up the rim of the orbit?

Answer 24

The maxillary, frontal, and zygomatic bones

Question 25

What does the inferior orbital fissure transmit?

Answer 25

The infraorbital branch of V2

Question 26

The supraorbital notch transmits what?

Answer 26

the supraorbital nerve and the supraorbital branch of the ophthalmic artery

Question 27

The infraorbital foramen transmits

Answer 27

the infraorbital branch of V2