neuro4 easy

Question 1

The only cranial nerve that doesn’t exit anteriorly

Answer 1

CN IV

Question 2

The only cranial nerve that doesn’t synapse in the thalamus

Answer 2

CN I

Question 3

Pure motor nerves

Answer 3

CN III, IV, VI, XI, XII

Question 4

Mixed nerves

Answer 4

CN V, VII, IX, X

Question 5

Where is the oculomotor nuclei?

Answer 5

Superior colliculus

Question 6

Nerve supply to SR, MR, IR, IO

Answer 6

Oculomotor

Question 7

Parasympathetic nerve supply to sphincter pupillae

Answer 7

Oculomotor

Question 8

Parasympathetic nerve supply to the ciliary muscle

Answer 8

Oculomotor

Question 9

What type of nerve fibres in the oculomotor nuclei?

Answer 9

Somatic motor

Parasympathetic

Question 10

Where is the trochlear nucleus?

Answer 10

Inferior colliculus

Question 11

Where is the abducens nucleus?

Answer 11

4th ventrical/ caudal pons

Question 12

Nerve supply to the geniog, hyog, stylog?

Answer 12

Hypoglossal

Question 13

Nerve supply to the intrinsic tongue muscles?

Answer 13

Hypoglossal

Question 14

Which nerve:

Somatosensation of face: discriminative touch, vibration sense, pain, temperature

Answer 14

CN V

Question 15

Which nerve:

Proprioception associated with chewing (TMJ), muscles of mastication, teeth

Answer 15

CN V

Question 16

Which nerve:

Motor control of muscles of mastication

Answer 16

CN V

Question 17

Which nerve:

Motor control of tensor tympani, mylohyoid, ant. belly of digastric, tensor veli palatini

Answer 17

CN V

Question 18

Which nucleus:

Proprioception info from chewing muscles (CNV) ?

Answer 18

Mesencephalic nucleus

Question 19

Which nucleus:

Discriminative touch, vibration (CNV)?

Answer 19

Pontine

Question 20

Which nucleus:

Pain and temp (CNV)

Answer 20

Spinal nucleus

Question 21

this is the only site in the CNS where the cell bodies of the primary afferent neurons live inside the CNS

Answer 21

Mesencephalic nucleus

Question 22

Is info from the pontine trigeminal nucleus conveyed unilaterally or bilaterally?

Answer 22

Bilaterally

• pontine nucleus = discriminative touch, vibration
• fibres leave here, some cross midline and some don’t = bilateral representation of touch and vibration in cortex

(CN V remember)

Question 23

Motor to muscles of facial expression, stapedius

Answer 23

CN VII

Question 24

Parasymp. to pterygopalatine and submandibular ganglia

Answer 24

CN VII

Question 25

Tast to anterior 2/3rds tongue

Answer 25

CN VII

Question 26

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

(pharyngotympanic tube = eustachian tube)

Answer 26

CN IX

Question 27

Taste to posterior 1/3rd tongue

Answer 27

CN IX

Question 28

Parasymp. fibres to the otic ganglion (parotid gland)

Answer 28

CN IX

Question 29

Motor to the stylopharyngeus?

Answer 29

CN IX

CN IX only supplies motor to ONE muscle!!

Question 30

Tactile sense, pain and temperature sense from the pharynx, larynx, trachea, oesophagus and thoracic and abdominal viscera

Answer 30

CN X

Question 31

Taste to epiglottis

Answer 31

CN X

Question 32

Paraymp. fibres to ganglia serving thoracic and abdominal viscera

Answer 32

CN X

Question 33

Motor to striated muscle of the pharynx and larynx

-which other nerve contributes to this function

Answer 33

CN X ( spinal accessory also contributes to this function)

Question 34

Nucleus ambiguus

Answer 34

-This is where you’ll find CN IX motor nerves (stylopharyngeus)

Nucleus ambiguus shared by CN IX, X and part of XI

(CNIX: stylopharyngeus
CN X: pharyngeal and laryngeal muscles)

Question 35

Commissural nucleus

Answer 35

Sensation etc (pain, temp) from post. tongue to upper pharnyx

CN IX

Question 36

Solitary nucleus

Answer 36

Taste and visceral info

CN VII, IX and X

Question 37

Which nerves share the sup. and inf. salivary nuclei

Answer 37

CN VII and IX

parasymp. to ganglia of salivary glands and pterygopalatine ganglion

Question 38

This nucleus supplies motor efferents to muscles of the pharnyx, larynx and upper oesophagus

Answer 38

Nucleus ambiguus

shared by CN IX, X and part of XI

Question 39

This nucleus extends in a V shape from upper to lower medulla

Answer 39

Nucleus solitarus

Question 40

Which nerves share the nucleus solitarus?

Answer 40

CN VII, IX and X

Question 41

Which part of the pyramidal tract supplies motor fibres to the cranial nerves?

Answer 41

The corticobulbar tract

Question 42

Input to the cranial nerves containing parasympathetic efferents comes mainly from where?

Answer 42

The hypothalamus

Question 43

What does the reticular formation do?

Answer 43

Integrate cranial nerve reflexes.
Participate in conduction and modulation of pain.
Influence voluntary movement.
Regulate autonomic activity.
Integrate some basic functions, like respiration and sleep.
Activate the cerebral cortex: major component of the Ascending Reticular Activating System (a medial bilateral lesion of the brainstem reticular formation at or above the upper pons causes irreversible coma)