Salivary Glands, Ear, Petrosal Region

Question 1

Parotid gland and duct

Answer 1

25-30% of saliva production

Serous saliva

Question 2

Sublingual gland and duct

Answer 2

3-5% of saliva production

Serous and mucous saliva, primarily mucous

Question 3

Submandibular gland and duct

Answer 3

60-70% of saliva production

Serous and mucous saliva, primarily serous

Question 4

Which gland is hook shaped, wraps around posterior border of mylohyoid m.?

Answer 4

Submandibular Salivary Gland

Question 5

Submandibular Salivary Gland aka

Answer 5

Wharton’s duct

Question 6

Submandibular Salivary Gland innervated by

Answer 6

CN VII

Question 7

Lingual nerve next to ____ and they loop around and criss-cross at one point.

Answer 7

submandibular duct

Question 8

Sublingual Salivary Gland innervated? creates what fold?

Answer 8

CN VII

Sublingual fold

Question 9

Parotitis/Mump 2 types?

Answer 9

1. Bacterial parotitis-high mortality rate, seen in elderly taking anticholinergic meds that inhibit salivary flow
2. Viral parotitis (mumps)-spread through saliva, coughing, sneezing. mumps vaccine since 1970s.

Question 10

Parotid tumors

Answer 10

80% benign
lose facial expression
can spread to mandible, pharynx, base of skull, middle ear, cervical lymph nodes

Question 11

Frey’s Syndrome

Answer 11

Sweating and redness in the distribution of the auriculotemporal nerve during eating

Question 12

Parotid fistula

Answer 12

Communication between the parotid gland and the skin or oral cavity
Often occur from trauma:
Injury during surgery
Secondary to tumors
Congenital
Infection

Question 13

Superficial Auricle

Answer 13

Auriculotemporal (from V3)

Cervical plexus

Question 14

cervical plexus

Answer 14

Lesser occipital nerve (C2)

Great auricular nerve (C2, C3)

Question 15

Deep Auricle

Answer 15

Auricular branch (from X)
Auricular branch (from VII)

Question 16

Arterial supply of external ear

Answer 16

Superficial temporal a. (from ECA)
Posterior auricular a. (from ECA)
Deep auricular a. (from maxillary a.)
Anterior tympanic a. (from maxillary a.)

Question 17

Ceruminous glands

Answer 17

Are in external acoustic meatus and produce Cerumen (earwax)

Question 18

Tympanic membrane innervated by?

Answer 18

Lateral=V3

Medial side innervated by IX

Question 19

Tympanic membrane is a 3 layer membrane what is in each?

Answer 19

External layer is skin, stratified squamous epithelium

Middle layer is fibrous, attaching to the malleus

Inner layer is mucous membrane, ciliated columnar epithelium

Question 20

Middle ear located at the?

Answer 20

petrous portion of the temporal bone.

Question 21

Roof of middle ear

Answer 21

Tegmen tympani, separating middle ear from temporal lobe of the brain

Question 22

Floor of middle ear

Answer 22

Thin bone, immediately superior to the internal jugular v.

Question 23

What muscle attaches to the auditory tube?

Answer 23

salpingopharyngeus muscle

Question 24

Anterior wall of middle ear

Answer 24

auditory tube
lesser petrosal nerve
postganglionic sympathetic fibers

Question 25

posterior wall of middle ear

Answer 25

Facial canal, terminates at stylomastoid foramen Mastoid antrum, leads to mastoid air cells Stapedius

Question 26

medial wall of middle ear

Answer 26

oval window round window tensor palatini promontory

Question 27

lateral wall of middle ear

Answer 27

chorda tympani | tympanic membrane

Question 28

Content of middle ear

Answer 28

VII Chorda tympani passes through, does not innervate Nerve to stapedius ``` IX Tympanic nerve Tympanic plexus With sympatheic fibers Lesser petrosal nerve ```

Question 29

Sensory innervation of middle ear

Answer 29

tympanic plexus

Question 30

Mastoiditis

Answer 30

Usu. second to otitis media may lead to partial or total hearing loss Can travel through bone to the middle cranial fossa, causing meningitis Mastoidectomy to surgically remove pus

Question 31

Inner ear 2 parts

Answer 31

Osseous labyrinth-filled with perilymph | Membranous labyrinth-filled with endolymph

Question 32

Inner ear includes

Answer 32

vestibule 3 semicircular canals cochlea vestibular and cochlear nerves

Question 33

Cochlea 3 parts

Answer 33

Scala vestibuli -Perilymph Cochlear duct -Endolymph Scala tympani -Perilymph

Question 34

Pathway of sound

Answer 34

Middle ear vibrates back and forth-->malleus-->incus--> stapes attached to oval window-->fluid (peri and endo) will bounce in cochlea-->inside cochlear duct is organ of corti--> morse code with tectorial membrane

Question 35

The parotid salivary gland is associated with the ___ nucleus.

Answer 35

inferior salivatory

Question 36

The sublingual salivary gland is ass. with the __ of nucleus.

Answer 36

superior salivatory

Question 37

Highest to lowest salivary production

Answer 37

submandibular>parotid>sublingual

Question 38

Bartholin's duct aka

Answer 38

sublingual duct

Question 39

What provides sensory innervation to auricle

Answer 39

``` lesser occipital nerve great auricular nerve auriculotemporal nerve CN VII CNX ```

Question 40

Part of the anterior border of the parotid bed?

Answer 40

Masseter

Question 41

Deep surface of the tympanic membrane is innervated by

Answer 41

IX

Question 42

Located in middle ear

Answer 42

``` chorda tympani lesser petrosal nerve nerve to the stapedius tympanic nerve tympanic plexus ```

Question 43

Opening that acts as a pressure release valce for the inner ear

Answer 43

Round window

Question 44

Sympathetic innervation reaches the inner ear by traveling with the

Answer 44

Internal carotid artery

Question 45

The nerve to the medial pterygoid, a branch of V3, innervates the medial pterygoid muscle and the

Answer 45

Tensor veli palatini | Tympani

Question 46

Which salivary gland secretes saliva into the oral cavity near the maxillary second molar?

Answer 46

Parotid gland

Question 47

The deep portion of the submandibular salivary gland lies between the __muscle and the mandible.

Answer 47

Hyoglossus

Question 48

The tragus is __to the helix

Answer 48

anterior

Question 49

In the middle ear, the chorda tympani is __ to the oval window.

Answer 49

lateral

Question 50

The ___ never branches from the facial nerve while in the parotid salivary gland.

Answer 50

Zygomatic nerve

Question 51

The malleous is ___ to the stapes

Answer 51

lateral

Question 52

Parotid Bed anterior

Answer 52

Masseter m. | Ramus of mandible

Question 53

Posterior of parotid bed

Answer 53

Mastoid process of the temporal bone | Sternocleidomastoid m.

Question 54

Medial of parotid bed

Answer 54

Styloid process | Transverse process of C1

Question 55

Lateral of parotid bed

Answer 55

Investing layer of deep cervical fascia