Cranial Nerves Flashcards Preview

Hugh's MD1 Neuro > Cranial Nerves > Flashcards

Flashcards in Cranial Nerves Deck (66):
1

What is the anatomical landmark for the roustal end of the brainstem?

Mammillary bodies

1

Which CN's nuclei are in the brachial column of the motor region of the brainstem?

Roustral to caudal

Mandibular division of V/Trigeminal (Pons)

VII/Facial (Pons)

IX/Glossopharyngeal (Medulla)

X/Vagus (Medulla)

XI/Accessory (Spinal cord)

1

Which CN nuclei are contained in the nucleus solitarius?

CNVII, IX and X

2

Where does the nucleus ambiguus lie in relation to the inferior olive?

Behind

2

Which part of the brainstem does the gag reflex test?

The medulla

3

Which extraocula muscles does the oculomotor nerve innervate?

Medial rectus

Superior rectus

Inferior rectus

Inferior oblique

4

What type of sensory input does the nucleus solitarius deal with?

Taste (roustal aspect) 

Autonomic from the heart, abdomen and viscera

4

Where does the olfactory nerve exit the skull?

Cribiform plate of the ethmoid bone

5

Where does the opthalmic branch of CNV exit the skull?

Superior orbital fissure

5

Which nerve does the sensory input for the gag reflex?

Glossopharyngeal

6

What role does the facial nerve play in the corneal reflex?

Its temporal branch closes the eye

7

Which nerves go through the superior orbital fissure?

III

IV/Trochlea

VI/Abducent

V1

8

What is the motor innervation of the facial nerve?

Muscles of facial expression

Stapedius muscle (ear)

Part of the digastric muscle

9

What does the CNVIII do?

Sensory input from ears and vestibular apparatus

9

Where does the vestibulocochlear nerve exit the skull?

Internal auditory meatus

11

List the cranial nerves?

CNI - Olfactory

CNII - Optic

CNIII - Oculomotor

CIV - Trochlea

CNV - Trigeminal

CNVI - Abducent

CNVII - Facial

CNVIII - Vestibulocochlear

CNIX - Glossopharyngeal

CNX - Vagus

CNXI - Accessory

CNXII - Hypoglossal

12

What is the mesencephalic nuclei of the CNV for?

Proprioception

12

What does motor CNX do?

To striated muscles: Soft palate, pharynx, larynx, upper oesophagus and 1 tongue muscle

 

PS to many organs

13

Which nerve covers the motor efferent output of the corneal reflex?

CNVII/Facial

16

Which CN's nuclei are in the special sensory column of the sensory region of the brainstem?

 

VIII Vestibulocochlear (Pons/Medulla)

17

Which CN's nuclei are in the visceral column of the motor aspect of the brainstem?

From roustral to caudal

III/Oculomotor (midbrain) - nucleus is called the Edinger Westphal

VII/Facial (Pons) - Superior salivary nucleus

IX/Glossopharyngeal (Medulla) - Inferior salivary nucleus

X/Vagus (Medulla) - Dorsal motor nucleus of vagus

18

Apart from motor and sensory, what does CNX do?

Input from baro and chemoreceptors of the aortic arch

20

Which cranial nerves are purely sensory?

CNI - Olfactory

CNII - Optic

CNVIII - Vestibulocochlear

22

What are the three columns of sensory nuclei in the lateral aspect of brainstem called (medial to lateral)?

Visceral

Somatic 

Special

23

What branch of the facial nerve does the motor function?

Facial nerve proper

23

Which nerve does the motor output for the gag reflex?

X - to the pharynx

25

Which cranial nerves are mixed sensory and motor?

CNV - Trigeminal

CNVII - Facial

CNIX - Glossopharyngeal

CNX - Vagus

26

What is the sensory distribution of the Trigeminal nerve?

Face - infront of the ear 

(Split into opthalmic V1, maxillary V2 and mandibular V3)

Inside mouth

26

Where does the maxillary division of CNV exit the skull?

Foramen rotundum

27

Where do the nerve of the ocular motion exit the skull?

Superior orbital fissure

27

Where does CNXI exit the skull?

Hypoglossal foramen

28

Which nerves exit the skull through the auditory canal?

VII/Facial

VIII/Vestibulocochlea

29

How many nuclei does the trigeminal nerve have? What are they called?

4

Mesencephalic

Chief sensory

Spinal trigeminal nucleus (STN)

Motor nucleus

31

What motor does the glossopharyngeal nerve do?

Parasympathetic to parotid

Motor to stylopharyngeus (lifting soft palate to allow speach)

32

What sensory does CNX do?

Pharynx, larynx and oesophagus

 

33

What is the parasympathetic innervation of the facial nerve?

Lacrimal and sublingual and submandibular salivary glands

35

What is the motor innervation of the trigeminal nerve?

Muscles of mastication

Tensor tympani

36

Which cranial nerves are purely motor?

CNIII - Oculomotor

CNIV - Trochlear

CNVI - Abducent

CNXI - Accessory

CNXII - Hypoglossal

37

What is the visceral sensory innervation of the facial nerve?

Taste for the ant 2/3 of the tongue and soft palate

37

Where does CNIX exit the skull?

Jugular foramen

38

Which other nerve exits with VIII?

VII

39

What is the somatic sensory innervation of the facial nerve?

Small region near the external auditory meatus

41

What is the effector muscle in the papillary reflex?

Sphincter Pupillae muscle

43

What are the three subdivisions of motor aspect of the brainstem?

Midlines > Lateral

Somatic > Brachial > Visceral

44

What is the spinal trigeminal nucleus of the CNV for?

Pain

45

What is the acronym for the cranial nerves?

Oh oh oh, to touch A fine virgin girls vagina and hymen

45

Which nerves exit the skull through the jugular foramen?

IX/Glossopharyngeal

X/Vagus

XI/Accessory

46

What are the six extraocular muscles?

Sup. rectus

Inferior rectus

Medial rectus

lateral rectus

 

Sup oblique

Inferior oblique

47

What sensory does the glossopharyngeal nerve do?

Tongue (post 1/3)

Pharynx

Middle ear

Carotid body

 

Taste: post 1/3 of tongue

47

What does the hypoglossal nerve do?

Somatic motor of the intrinsic and extrinsic muscles of the tongue

48

Must of the motor innervation for the tongue is done by ... but some is also done by ...

CNXII

and CNX

49

What is the name of the branch of the facial nerve that does non-motor innervation?

The nervus intermedius

50

What is the chief sensory nuclei of CNV for?

Other sensory (not proprioception and pain)

52

What important structure does the facial nerve pass through but not innervate?

The parotid gland

53

How is the CN nuclei divided in the brainstem?

Each side has 6 columns 

The 3 medial are motor and the three lateral are sensory

54

Which CN's nuclei are in the somatic aspect of the motor region of the brainstem?

In roustral to caudal order

III/Oculomotor (Midbrain)

IV/Trachlea (Midbrain)

VI/Abducent (Pons)

XII/Hypoglossal (Medulla)

 

Note: the first three all control movement of the eye ball

56

Where does the mandibular division of CNV exit the skull?

Foramen Ovale

57

Which hole does the optic nerve exit the skull through?

Optic canal

58

Describe the course of CNXI

Branches off the spinal cord

Enters the skull through the foramen magnum

Loops down and exits through the jugular foramen

59

What is the visceral motor innervation of the oculomotor nerve?

Iris (pupil) - relevant for papillary reflex

Ciliary muscle - focusing

60

What nerve exits the skull through the hypoglossal foramen?

XII/Hypoglossal

61

Which of the brainstem does the corneal reflex test?

The pons

62

Which nerve covers the sensory afferent input from the corneal in its reflex?

V1 - Opthalmic division of CNV

64

What are the five terminal branches of the facial nerve proper called?

Temporal

Zygomatic

Buccal

Marginal Mandibular

Cervical

65

What does CNXI do?

Motor innervation for Upper trap and sternomastoid

66

What is the name of the nuclei that cranial nerves IX and X share in the brachial column of the motor aspect of the brainstem?

Nucleus Ambiguus