67 Autonomic and Taste Nerves in the Infratemporal Fossa

Question 1

Identify 1 - 2

Answer 1

1. Otic ganglion
2. Lingual n.

Question 2

Identify 3 - 5

Answer 2

3. Inferior alveolar n.
4. Chorda tympani n.
5. Auriculotemporal n.

Question 3

Identify 6 - 7

Answer 3

6. Lesser petrosal n.
7. Mandibular n.

Question 4

The infratemporal fossa has 2 nerves and 1 autonomic ganglion located within it
-> What are they?

Answer 4

the lesser petrosal n., the chorda tympani n., and the otic ganglion.

Question 5

The chorda tympani n. is a branch from ____ within the tympanic cavity.

Answer 5

the facial n.

Question 6

The chorda tympani n. carries the preganglionic parasympathetic fibers to (1)____ and taste fibers to (2)_____

Answer 6

1. the submandibular ganglion
2. the anterior 2/3 of the tongue.

Question 7

The chorda tympani n. exits the petrotympanic fissure to join the posterior border of ____ (which nerve?) in the infratemporal fossa.

Answer 7

the lingual n.

Question 8

The auriculotemporal n. allows the postganglionic parasympathetic fibers from the otic ganglion to travel with it to be distributed to ___

Answer 8

the parotid gland → to cause salivation.

Question 9

The chorda tympani n. exits the petrotympanic fissure to join the posterior border of the lingual n. in the infratemporal fossa.

→ Because the lingual n. is distributed to ____, the taste fibers from the chorda tympani travel to the taste buds in this region.

Answer 9

the anterior 2/3 of the tongue

Question 10

Autonomic fibers synapse in the submandibular ganglion to be distributed to ___ and ____ (which glands?)

Answer 10

the submandibular and sublingual glands

Question 11

The lesser petrosal n. arises from ____ on the promontory of the ear.

Answer 11

the tympanic plexus

Question 12

The lesser petrosal n. carries ___ and ____ that are traveling to the parotid gland.

Answer 12

1. the preganglionic parasympathetic (from the tympanic branch of CN IX)
2. postganglionic sympathetic (from the caroticotympanic branch of the internal carotid a. plexus)

Question 13

The otic ganglion is a collection of postganglionic parasympathetic nerve cell bodies that travel to ____

Answer 13

the auriculotemporal n. of the trigeminal n.

Question 14

The auriculotemporal n. allows the postganglionic parasympathetic fibers from ____ to travel with it to be distributed to the parotid gland, to cause salivation.

Answer 14

the otic ganglion