Cranial Nerves

Question 1

What is the most rostral part of the brainstem anteriorly?

Answer 1

Mammilary Bodies

Question 2

What is the function of the mamillary bodies?

Answer 2

Spatial and episodic memory

Question 3

CN 12

Answer 3

Hypoglossal (M)

Question 4

CN 11

Answer 4

Accessory (M)

Question 5

CN 10

Answer 5

Vagus (B)

Question 6

CN 9

Answer 6

Glossopharyngeal (B)

Question 7

CN 8

Answer 7

Vestibulochochlear (S)

Question 8

CN 7

Answer 8

Facial (B)

Question 9

CN 6

Answer 9

Abducens (M)

Question 10

CN 5

Answer 10

Trigeminal (B)

Question 11

CN 4

Answer 11

Trochlear (M)

Question 12

CN 3

Answer 12

Oculomotor (M)

Question 13

CN 2

Answer 13

Optic (S)

Question 14

CN 1

Answer 14

Olfactory (S)

Question 15

What is the rule of 4 and show its application?

Answer 15

4 Nerves Before the Pons (only 3-4 at midbrain)
4 Nerves at the Pons
4 Nerves after the Pons

Question 16

in terms of columns in the brainstem, what is more medial motor or sensory?

Answer 16

Motor

Question 17

How many columns are in the motor division and what are they?

Answer 17

3 And from medial to lateral

Somatic —> Branchial —> Visceral

Question 18

What is the Somatic Strip?

Answer 18

Muscles that can be controlled voluntarily

Question 19

What is the branchial strip?

Answer 19

Muscles of the face

Question 20

What is the visceral strip?

Answer 20

in charge of innervation of visceral structures

Question 21

In terms of the Midbrain - Pons - Medulla - SC what nerves come out at each level in the somatic strip of the motor division

Answer 21

3,4 - 6 - 12 - 0

Question 22

In terms of the Midbrain - Pons - Medulla - SC what nerves come out at each level in the branchial strip of the motor division

Answer 22

0 - 5(V3),7 - 9,10 - 11

V3=Mastication Mandibular Rami

Question 23

In terms of the Midbrain - Pons - Medulla - SC what nerves come out at each level in the visceral strip of the motor division

Answer 23

3 - 7 - 9,10 - 0

Question 24

What nucleus is in charge of the parasympathetic component of the CN 3

Answer 24

Edinger Westfal

Question 25

What nucleus is in charge of the parasympathetic component of the CN 7

Answer 25

Sup Salivatory Nucleus

Question 26

What nucleus is in charge of the parasympathetic component of the CN 9

Answer 26

Inf Salivatory Nucleus

Question 27

What is the name of the nucleus for the branchial component of CNs 9 and 10? Where is it located?

Answer 27

Nucleus Ambiguus | At the level of the medulla behind the Inferior Olive

Question 28

What facial muscle does CN 9 controls?

Answer 28

Stylopharingeus

Question 29

What facial muscle does CN 10 controls?

Answer 29

Levator Palati

Question 30

How many columns does the sensory division has?

Answer 30

3, they come lateral to the motor division

Question 31

in the sensory division what is most medial and what is most lateral?

Answer 31

From medial to lateral | Visceral --> Somatic ---> Special Sensory

Question 32

In terms of the Midbrain - Pons - Medulla what nerves come out at each level in the visceral strip of the sensory division

Answer 32

0 - 7 - 9,10 (7,9,10 form a large continuous nucleus)

Question 33

The common nucleus for the CNs 7,9,10 is called and is located at the level of ----

Answer 33

Nucleus Tractus Solitarius (NTS) | Pons and medulla

Question 34

In terms of the Midbrain - Pons - Medulla what nerves come out at each level in the somatic strip of the sensory division

Answer 34

5 - 5,7 - 9,10 (5,7,9,10 form one big nucleus spanning from the most distal part of the pons to the medulla)

Question 35

The nucleus Tractus Solitarius most rostrally is formed by the (1) and more caudally by the (2)

Answer 35

1 Gustatory Nucleus | 2 Visceral Sensory

Question 36

Gustatory Nucleus receives information by the Nerves

Answer 36

7,9,10

Question 37

Visceral Sensory information of the Nucleus Tractus Solitarius comes from the nerves (1) and is information from (2)

Answer 37

9 --> Baroreceptors, chemoreceptors from carotid body and sinus 10 --> Heart and abdominal Visceral

Question 38

What type of information and from where does the somatic sensory Strip receives information from?

Answer 38

5 --> face and Mucosa of the mouth and nose | 7,9,10 --> skin behind ear and external auditory meatus

Question 39

In terms of the Midbrain - Pons - Medulla what nerves come out at each level in the special sensory strip of the sensory division

Answer 39

0 - 8 - 8 (8 is one nucleus spanning from one area to the next)

Question 40

What nerves come from the anterior cranial fossa?

Answer 40

Cribiform Plate --> 1

Question 41

What nerves come from the middle cranial fossa?

Answer 41

Optic Canal --> 2 | Superior Orbital Fissure --> 3,4,5(V1),6

Question 42

What nerves come from the posterior cranial fossa?

Answer 42

Internal Acoustic Meatus ---> 7,8 Jugular Foramen --> 9,10,11 Hypoglossal Foramen --> 12

Question 43

How many nuclei does the trigeminal nerve have?

Answer 43

``` 4 Mesencephalic --> Propioception Chief Sensory * Spinal Trigeminal Nucleus (STN) ---> Pain * Motor Nucleus * sensory info from face and head ```

Question 44

the motor part of the trigeminal nerve travels via which division of the nerve?

Answer 44

The mandibular Division

Question 45

the motor action of CN 7 is to

Answer 45

Face and the Stapedius Muscle (Dampening of sound)

Question 46

the sensory and parasympathetic action of CN7 is via what nerve

Answer 46

Nervus intermedius

Question 47

the sensory information of the anterior 2/3 of the tongue and small part of the external auditory meatus travel via

Answer 47

CN 7

Question 48

where do the terminal branches of CN 7 originate and what are they?

Answer 48

in the parotid gland | Temporal, Zygomatic, Buccal, Mandibular, Cervical

Question 49

Parasympathetic innervation of CN7 is to the

Answer 49

Lacrimal Gland

Question 50

the sensory information of the posterior 1/3 of the tongue travels via the

Answer 50

Glosopharyngeal nerve (9)

Question 51

the sensory information of the posterior 1/3 of the tongue, pharynx, middle ear, and carotid body (visceral) travels via the

Answer 51

Glosopharyngeal nerve (9)

Question 52

The motor supply of the Glosopharyngeal nerve (9) is given to which muscle?

Answer 52

stylopharingeus

Question 53

Visceral Motor supply given by the Glosopharyngeal nerve (9) is to the

Answer 53

Parotid Gland (parasympathetic)

Question 54

Motor supply of the vagus nerve is given to

Answer 54

soft palate, pharynx, larynx, upper oesophagus, palatoglossus (tongue muscle)

Question 55

Visceral sensory information of the vagus nerve comes from

Answer 55

baro- and chemoreceptors of the aortic arch

Question 56

What nerve gives nerve supply to the vocal cords?

Answer 56

Recurrent Laryngeal (branch of 10)

Question 57

what is the afferent, efferent of the PUPILLARY REFLEX and what brain structure does it test for?

Answer 57

A: Optic Nerve E: Oculomotor Tests 4: Midbrain Function

Question 58

what is the afferent, efferent of the CORNEAL BLINK REFLEX and what brain structure does it test for?

Answer 58

A: Ophthalmic Branch of Trigeminal Nerve (V1) E: Facial (orbicularis Oculi) Tests 4: Pons Function

Question 59

what is the afferent, efferent of the GAG REFLEX and what brain structure does it test for?

Answer 59

A: Glossopharyngeal E: Vagus Tests 4: Medullary Function

Question 60

CN 12 controls...

Answer 60

intrinsic/extrinsic muscles of the tongue

Question 61

if the accessory nerve is damaged the patient cannot turn the head towards the ipsilateral/contralateral side

Answer 61

towards the contralateral side of the lesioned nerve

Question 62

Trigeminal nerve is for

Answer 62

sensation of the face, muscle of mastication, and tensor tympani muscle