Pterygopalatine Fossa

Question 1

Describe bounds of pterygopalatine fossa

Answer 1

1. Ant, post surface if maxilla
2. Post: pterygoid process
3. Med: vertical plate of palatine bone
4. Lat: opens in infratemporal fossa by pterygomaxillary fissure

Question 2

PP fossa communicates with nose via…..which transmits……

Answer 2

Sphenopalatine foramen
Nasopalatine foramen & other nasal branches

Question 3

PP fossa communicates with pharynx via….which transmits…..

Answer 3

Palato-vaginal canal
Pharyngeal branch of maxillary art and of pterygopalatine ganglia

Question 4

PP fossa communicates with palate via….which transmits…..

Answer 4

Greater and lesser palatine foramina
Greater and lesser palatine nerves and vessels

Question 5

Pterygoid canal transmits….

Answer 5

Nerve of pterygoid canal

Question 6

Enumerate branches of first part of maxillary art

Answer 6

Deep auricular, anterir tympanic, middle meningeal art, accessory meningeal art and inferir alveolar art.

Question 7

Enumerate branches of second part of maxillary art

Answer 7

Deep temporal, pterygoid, massetetric, buccal

Question 8

Enumerate branches of third part of maxillary art

Answer 8

Posterior superior alveolar, infra-orbital (ant & middle sup alveolar), pharyngeal, artery of pterygoid canal, sphenopalatine art, greater & lesser palatine arts

Question 9

Middle meningeal art passes through…..while accessory meningeal art passes through……

Answer 9

Foramen spinosum
Foramen ovale

Question 10

The posterior superior alveolar art supplies…..while infra-orbital art supplies……

Answer 10

Upper molars
Rest of upper teeth, skin of lower eyelid, ala of nose and upper lip

Question 11

Greater and lesser palatine arts supply…..while sphenopalatine supplies…..

Answer 11

Hard & soft palate
Lateral and medial walls of the nose

Question 12

Pharyngeal art of maxillary supplies….

Answer 12

Nasopharynx

Question 13

Enumerate branches of inferior alveolar artery

Answer 13

Mylohyoid artery
Inferior dental branches
Incisive branches
Mental branches

Question 14

Middle meningeal art passes between…..

Answer 14

Lateral pterygoid and tensor tympani

Question 15

The ant branch of MMA passes to…..while post branch passes to….

Answer 15

Pterion
Lambda

Question 16

The pterygoid plexus of veins drains into…..

Answer 16

Maxillady vein

Question 17

Describe Communications of pterygoid plexus of veins

Answer 17

1. Facial vein via deep facial vein
2. Cavernous sinus via emissary veins which pass in foramen ovale, sphenoidal foramen and foramen lacerum
3. Inferior ophthalmic vein via a vein that passes through inferior orbital fissure.

Question 18

Mention symp, parasymp roots and distribution of otic ganglion

Answer 18

S, plexus around MMA
P, inferior salivatory branch to tympanic branch of 9th n to tympanic plexus to lesser petrosal n. that passes in foramen ovale to otic gangion
D, postganglionic fibers to parotid gland auriculotemporal n.

Question 19

Submandibular ganglion lies on lateral surface of…..muscle

Answer 19

Hyoglossus

Question 20

Describe symp, parasymp, sensory roots and distribution of submandibular ganglion

Answer 20

Sens, lingual n
S, plexus around facial a.
P, superior salivatory n. to nervus intermedius of facial to chorda tympani that unites with lingual nerve
Distributed as postganglionic fibers to submandibular gland directly and to sublingual gland by rejoining lingual n.

Question 21

Describe symp, parasymp, sensory roots and distribution of sphenopalatine ganglion

Answer 21

Symp, plexus around ICA
Para, superior salivatory nucleus and special lacrimatory nucleus to nervus intrrmedius of facial to greater petrosal n. that unites with deep petrosal n. to form nerve of ptrygoid canal.
D postganglionic fibers to orbital periosteum, lacrimal gland and mucous gland in nose, palate and nasopharynx