Lecture 2: Smell, Taste And Salivation

Question 1

Which part of the nasal cavity is involved in olfaction?

Answer 1

The upper part.

Question 2

Is the superior meatus or the superior concha made of bone?

Answer 2

The superior concha. The meatus is the space under each concha.

Question 3

Where do the olfactory nerves pass through?

Answer 3

The cribriform plate foramina of the ethmoid bone.

Question 4

Which olfactory pathway is involved in the emotional aspects of olfaction?

Answer 4

The medial olfactory pathway.

Question 5

Which sinus poses a severe problem in chronic sinusitis?

Answer 5

The maxillary sinus.

Question 6

Which muscle aids chewing but is not a muscle of mastication?

Answer 6

Buccinator muscle.

Question 7

Which cranial nerve are all the muscles of the tongue innervated by? Which muscle is the exception and what nerve supplies it?

Answer 7

Hypoglossal nerve.

Palatoglossus is the exception which is innervated by the vagus nerve.

Question 8

Which nerve supplies general sensation of the anterior 2/3rds of the tongue?

Answer 8

The lingual nerve branch of the mandibular devision of the trigeminal nerve.

Question 9

Which nerve supplies the taste of the anterior 2/3rds of the tongue? How does it get there?

Answer 9

The chorda tympani of the facial nerve. This hitchhikes to the anterior 2/3rds of the tongue via the lingual nerve.

Question 10

General and sense sensation of the posterior 1/3rd of the tongue is supplied by which nerve?

Answer 10

Glossopharyngeal nerve.

Question 11

Which part of the facial nerve does the chorda tympani come from?

Answer 11

Nervus intermedius of the facial nerve.

Question 12

What are the three types of salivary glands?

Answer 12

Serous, mucous and mixed (serous and mucous)

Question 13

Which cranial nerve passes through the parotid gland but does not innervate it?

Answer 13

The facial nerve.

Question 14

Which two nerves are involved in the salivary parasympathetic innervation of the parotid gland and where do they synapse?

Answer 14

The tympanic nerve branch of the glossopharyngeal nerve turns into the lesser petrosal nerve and synapses at the otic ganglion with the auriculotemporal nerve which innervates the parotid gland.

Question 15

With regard to parasympathetic secretomotor innervation of the salivary glands, where does the chorda tympani of the facial nerve synapse and how does it get there?

Answer 15

It synapses at the submandibular ganglion and gets there by hitchhiking via the lingual nerve.