Exam 3: Smell and Taste

Question 1

What portion of the cortex is olfactory sensation sensed?

Answer 1

Rhinencephalon/piriform lobe

Question 2

What are of the brain is involved in emotional reactions to smell?

Answer 2

Limbic system

Question 3

What 2 pathways are leaving the olfactory bulb?

Answer 3

Medial and lateral olfactory tract

Question 4

What pathway leaving the olfactory bulb crosses midline?

Answer 4

Medial olfactory tract

Question 5

What pathway leaving the olfactory bulb goes to the piriform lobe for perception of smell?

Answer 5

Lateral olfactory tract

Question 6

What pathway leaving the olfactory bulb foes to the limbic system for emotional response to smell?

Answer 6

Both medial and lateral olfactory tracts

Question 7

What is different about the somatosensory sensation of smell versus all other somatosensory systems?

Answer 7

This is the only sensory system that does not project to the thalamus, lacking specific thalamic nuclei for cortical projection

Question 8

What CN supplies taste to the rostral tongue? What is its ganglion?

Answer 8

CN 7

Geniculate ganglion

Question 9

What CN supplies taste to the caudal tongue? What is its ganglion?

Answer 9

CN 9

Distal ganglion of CN 9

Question 10

What CN supplies taste to the pharynx/larynx? What is its ganglion?

Answer 10

CN 10

Distal ganglion of CN 10

Question 11

What brainstem nucleus are CN 7, 9, and 10 going to? What are of the brainstem is that in?

Answer 11

Solitary tract and nucleus

Medulla

Question 12

What else goes to the solitary tract and nucleus?

Answer 12

Blood vessel tension and dissolved gas in blood

Question 13

What is the pathway from the nucleus in the brainstem to the thalamus?

Answer 13

Solitariothalamic tract