Neuroanatomy 4: cranial nerves

Question 1

Parasympathetic innervation to pterygopalatine and submandibular ganglia

Answer 1

CN VII (facial nerve)

Question 2

Motor supply to the muscles of facial expression and stapedius

Answer 2

CN VII (facial nerve)

Question 3

Motor supply to stapedius?

Answer 3

CN VII (facial nerve)

Question 4

Which nerve is responsible for taste (anterior 2/3rds of tongue)

Answer 4

CN VII (facial nerve via c. tympani)

Question 5

Tactile sense, pain and temperature from the posterior tongue, pharyngotympanic tube and upper pharynx

Answer 5

Glossopharyngeal IX

Question 6

Where is the otic ganglion?

Answer 6

Parotid gland

Question 7

Which nerve is responsible for taste (posterior 1/3rd tongue)

Answer 7

Glossopharyngeal CN IX

Question 8

Supplies parasympathetic fibres to the otic ganglion (parotid gland)

Answer 8

Glossopharyngeal CN IX

Question 9

Nerve supply to the stylopharyngeus

Answer 9

Glossopharyngeal nerve (CN IX)

Question 10

Name the one muscle that the glossopharyngeal nerve supplies

Answer 10

Stylopharyngeus

Question 11

Nerve responsible for tactile sense, pain and temperature sense from the pharynx, larynx, trachea, oesophagus and thoracic and abdominal viscera

Answer 11

Vagus (CN X)

Question 12

Which nerve is responsible for taste on the epiglottis?

Answer 12

CN X (vagus)

Question 13

Which nerve supplies parasympathetic innervation to ganglia serving thoracic and abdominal viscera?

Answer 13

Vagus ( CN X)

Question 14

Motor supply to the striated muscle of the pharynx and larynx?

Answer 14

CN X (cranial accessory contributes to this function)

Question 15

Solitary nucleus is responsible for what?

Answer 15

Taste

Question 16

The fibres from the motor nucleus loop around which nucleus?

Answer 16

The abducens nucleus

Question 17

What is the solitary nucleus responsible for?

Answer 17

Taste and visceral sensory information

Question 18

Which cranial nerves share the solitary nucleus?

Answer 18

CN VII, IX and X

Question 19

What are the superior and inferior salivatory nuclei responsible for?

Answer 19

Provide parasympathetic efferents to ganglia of salivary glands and pterygopalatine ganglion

Question 20

Which nerves share the superior and inferior salivatory nucleii?

Answer 20

CN VII and IX

Question 21

What is the nucleus ambiguus responsible for?

Answer 21

Supplies motor efferents to the muscles of pharynx, laryns and upper oesophagus

Question 22

Which nerves share the nucleus ambiguus?

Answer 22

CN IX and X (and cranial part of CN XI)

Question 23

Where does the solitary nucleus/tract extend to/from?

Answer 23

From upper to lower medulla

Question 24

Where is the nucleus ambiguus?

Answer 24

Lower pons/upper medulla

Question 25

Motor input to the cranial nerves?

Answer 25

Corticobulbar tract

Question 26

The corticobulbar tract is motor supply to which cranial nerves?

Answer 26

CN V, VII, X and XII

Question 27

Is the input to the facial nucleus bilateral?

Answer 27

Only bilateral to the part that controls the muscles of the upper face (forehead and around the eyes)

Only a crossed input reaches the part of the facial nucleus that controls muscles in the lower half of the face

Question 28

Input to the cranial nerves containing parasympathetic efferents comes mainly from where? (and which are the CN’s that contain parasympathetic efferents?)

Answer 28

CN VII, IX and X

-Input mainly from hypothalamus

Question 29

A medial bilateral lesion of the brainstem reticular formation at or above the upper pons causes what?

Answer 29

Irreversible coma

Question 30

Name a couple things the reticular formation does

Answer 30

• integrates cranial nerve reflexes
• participates in conduction and modulation of pain
• influences voluntary movement
• regulates autonomic activity
• integrates some basic functions, like respiration and sleep