W5 - Cranial Nerves and the Bst

Question 1

How many of the 12 cranial nerves associate with the Bst?

Answer 1

11 (not olfactory, emerges from the forebrain)

Question 2

Which four cranial nerves emerge from the midbrain (and higher)?

Answer 2

Olfactory, optic, oculomotor, trochlear

Question 3

Which four cranial nerves emerge from the pons?

Answer 3

Trigeminal, abducens, facial, vestibulocochlear

Question 4

Which four cranial nerves emerge from the medulla?

Answer 4

Glossopharyngeal, vagus, spinal accessory and hypoglossal

Question 5

Which 3 nerves are pure sensory?

Answer 5

Olfactory, optic and vestibulocochlear

Question 6

Which 5 nerves are pure motor?

Answer 6

Oculomotor, trochlear, abducens, spinal accessory and hypoglossal

Question 7

Which 4 nerves are mixed?

Answer 7

Trigeminal, facial, glossopharyngeal and vagus

Question 8

What is the main function of the olfactory nerve (S)?

Answer 8

Smell

Question 9

What is the main function of the optic nerve (S)?

Answer 9

Vision

Question 10

What is the main function of the oculomotor nerve (M)?

Answer 10

Elevation and adduction of the eye

Question 11

What is the main function of the trochlear nerve (M)?

Answer 11

Depression and adduction of the eye

Question 12

What is the main function of the trigeminal nerve (S+M)?

Answer 12

Sensory - Facial sensations - touch, pain, proprioception
Motor - mastication (chewing)

Question 13

What is the main function of the abducens nerve (M)?

Answer 13

Motor - Abduction of the eye

Question 14

What is the main function of the facial nerve (S+M)?

Answer 14

Motor - Facial expression
Sensory - nasal secretion + lacrimation and taste

Question 15

What is the main function of the vestibulocochlear nerve (S)?

Answer 15

Sensory - hearing and balance

Question 16

What is the main function of the glossopharyngeal nerve (S+M)?

Answer 16

Sensory - taste, salivation
Motor - innervates pharynx

Question 17

What is the main function of the vagus nerve (S+M)?

Answer 17

Motor - larynx/pharynx (voicebox) Sensory - para reflexes (e.g. coughing), Autonomic - innervates heart/lungs/GI tract

Question 18

What is the main function of the spinal accessory nerve (M)?

Answer 18

Motor - innervates the muscles of the head and neck

Question 19

What is the main function of the hypoglossal nerve (M)?

Answer 19

Motor - Innervation of the tongue

Question 20

The sympathetic innervation doesn’t come from the Bst like the para innervation, where does it come from?

Answer 20

Symp neurons of the SC

Question 21

Which 2 areas are associated with dopamine?

Answer 21

Nigra substantia area and the ventral tegmental area

Question 22

Which area is associated with serotonin?

Answer 22

The raphe nuclei

Question 23

Which area is associated with noradrenaline?

Answer 23

Locus coeruleus of pons