T4: Infratemporal & Pterygopalatine Fossae

Question 1

Franks favorite food is candy. It is all he eats do to this dietary choice. His teeth have been to show deterioration, especially in the lower row of teeth. One day to feel a dull painful sensation coming from his lower teeth. Which nerve is transmitting this sensory data?

A. Buccal 
B. Deep Temporal 
C. Mylohyoid nerve
D. Chorda tympani 
E. Auriculotemporal
F. Inferior Alveolar
G. Lingual 

RFA

Answer 1

Ans. F. Inferior Alveolar-nerve supplies sensory to lower teeth.

A Buccal-sensory Cheeks CNV3

B. Deep Temporal- Motor lateral and medial pterygoid, masseter and temporalis, branch of CNV3

C. Mylohyoid nerve= motor mylohyoid and anterior belly of digastric , CNV3

D. Chorda Tympani=taste anterior 2/3, CNVII

E. Auriculotemporal nerve= sensory TMJ and parotid gland, CNV3

G. Lingual=sensory anterior 2/3 tongue. CNV3

Question 2

Which nerve in the PT fossa has a sensory, sympathetic and parasympathetic postganglionic component?

A. Nerve of the PT canal
B. Inferior Alveolar
C. Infraorbital
D. Zygomatic

RFA

Answer 2

Ans. D-Zygomatic

A. Nerve of the Pt canal= symp. and parasymp.

B. Inferior Alveolar= is part of the IT fossa not the PT fossa the Superior Alveolar is however part of the PT fossa and would have fit the description

C. Infraorbital= sensory 7 symp.

Question 3

Through which foramen does the middle meningeal artery enter?

A. Mandibular Foramen
B. Foramen Spinosum
C. Foramen Rotundum
D. Jugular Foramen

RFA

Answer 3

Ans. B- Foramen Spinosum-

A. Mandibular Foramen=inferior alveolar nerve

C. Foramen Rotundum= CNV2

D. Foramen Magnum= CN X, CN X, CN XI and internal jugular vein

Question 4

A nerve branching off of ___ was severed and the patient was no longer to open his mouth because the ____ lost its innervation. (mm)

A) V2 , Medial Pterygoid
B) VIII, Buccinator
C) V3, Lateral Pterygoid
D) V3, Buccinator

Answer 4

Answer = C

The lateral Pterygoid is a muscle of mastication and the only one that opens the mouth and protrudes the jaw

Question 5

The Pterygoid plexus is connected to the cavernous sinus via the _____? (mm)

A) Emissary Veins
B) Superior Ophthalmic Vein
C) Inferior Ophthalmic Vein
D) Facial Vein
E) Labial Vein

Answer 5

Answer = A

Deep facial joins the plexus
Maxillary vein continues off of plexus
Angular becomes the facial and joins w/ labial
facial + maxillary drain into reromandribular

Question 6

What is the post ganglionic sympathetic nerve to the pterygoid canal? (mm)

Answer 6

Deep Petrosal Nerve
(both for tearing)
Greater petrosal is the pre gang para sympathetic

Question 7

What is the postganglionic for making tears? (mm)

Answer 7

The zygomatic nerve which is a branch of the maxillary nerve w/ a communicating postganglionic to the lacrimal for tears