OS 204 1.2 Parotid Gland and Infratemporal Gland - Sheet1

Question 1

How many liters of saliva everyday

Answer 1

1.5-2 L

Question 2

Parotid Gland - type of secretion, innervation presyn/postsyn, duct

Answer 2

Serous, glossopharyngeal, otic ganglion via auriculo-temporal nerve, stensen’s (pierce buccinator; upper 2nd molar), 1/3 saliva (PSS)

Question 3

SubmandibularGland - type of secretion, innervation presyn/postsyn, duct

Answer 3

Serous and mucous, facial nerve, lingual nerve via chorda tympani, Wharton’s duct between mylohyoid and hypoglossus, 2/3 saliva (MWS)

Question 4

Sublingual Gland - type of secretion, innervation presyn/postsyn, duct

Answer 4

Mucous, Facial nerve, lingual nerve via chorda tympani nerve, Bartolin’s/Ricinus, smallest

Question 5

Most benign tumors occur in what lobe of the parietal gland

Answer 5

Superficial

Question 6

The deep lobe is intimately associated with the parapharyngeal space which contains (a, v, CN (4))

Answer 6

ICA, IJV, CN 9-12

Question 7

Separates the lower pole of the parotid gland from submandibular gland

Answer 7

Stylomandibular ligament

Question 8

Parotid sheath is made of what

Answer 8

Superficial layer of the deep cervical / investing fascia

Question 9

Structures inside parotid gland

Answer 9

NVA (lateral to medial)

Question 10

Branches of facial nerve after stylomastoid foramen

Answer 10

Posterior auricular, digastric, stylohyoid

Question 11

Lesion location, central vs peripheral

Answer 11

Central - from brainstem up to the brain; peripheral - after brainstem to peripheral branches

Question 12

Area of paralysis, central vs peripheral

Answer 12

Central - lower quadrant bc of crossing over of innervations (contralateral); Peripheral - entire half of face

Question 13

Contents of the infratemporal fossa - muscles (2), bv (2), nerve (3), ?

Answer 13

medial & lateral pterygoid; internal maxillary artery, maxillary vein; V3 - inferior alveolar, buccal, chorda tympani; otic ganglion

Question 14

What muscles form the mandibular sling? Action?

Answer 14

Medial pterygoid, masseter

Question 15

2 heads of medial pterygoid and lateral pterygoid

Answer 15

Medial - deep (larger) and superficial (smaller); superior (smaller) and inferior (larger)

Question 16

Action of medial pterygoid

Answer 16

Closes mouth and chews

Question 17

Action of lateral pterygoid

Answer 17

Protrudes jaw and opens mouth

Question 18

Muscles of mastication (3)

Answer 18

Pterygoids, masseter, temporalis - act on temporomandibular joint

Question 19

3 parts of internal maxillary artery

Answer 19

Mandibular, pterygoid, pterygopalatine

Question 20

Mandibular artery (5)

Answer 20

Deep auricular, anterior tympanic, middle meningeal, accessory meningeal, inferior alveolar

Question 21

Pterygoid artery (5)

Answer 21

Anterior deep temporal, posterior deep temporal (temporalis), masseteric, pterygoid, buccal

Question 22

Pterygopalatine (5) - nose and paranasal sinuses

Answer 22

Artery of pterygoid canal, infraorbital artery, greater / descending palatine artery, pharyngeal arteyr, posterior superior alveolar artery

Question 23

EJV = ? + ?

Answer 23

Retromandibular v + posterior auricular vein

Question 24

2 divisions of the V3, s/m?

Answer 24

Anterior (smaller) mostly motor; Posterior mostly sensory

Question 25

Branches of anterior division of V3

Answer 25

Nerve to masseter, deep temporal, to lateral pterygoid, buccal (sensory; inner cheek)

Question 26

Branches of posterior division of V3

Answer 26

Auriculotemporal (parotid and beyond... haha), inferior alveolar, lingual, mylohyoid (motor)

Question 27

What exits the ventral foramen as the mental nerve

Answer 27

Inferior alveolar nerve

Question 28

V3 has connections with what nerves?

Answer 28

9 via auriculotemporal and 7 via lingual

Question 29

Chorda tympani supplies (3)

Answer 29

Tongue (anterior 2/3, taste), sublingual & submandibular (secretions)

Question 30

Pain in parotid gland disease manifest in (4)

Answer 30

Auricle, external auditory meatus, temporal region, TMJ

Question 31

Dislocation of TMJ may be caused by

Answer 31

Excessive contraction of lateral pterygoids (yawn, large bite)

Question 32

Inferior alveolar block - where

Answer 32

Mandibular foramen

Question 33

Joint clicking aka

Answer 33

Crepitus

Question 34

Landmarks of facial nerve trunk (5)

Answer 34

Mastoid process, tragus, posterior belly of digastric, tympano-mastoid suture line, styloid process