NB2 7+8+ DLA

Question 1

trigeminal nerve attachment to the brainstem

Answer 1

Laterally merging with middle cerebellar peduncle

Question 2

major branches of the trigeminal nerve

Answer 2

Ophthalmic (sensory)
Maxillary (sensory)
Mandibular (sensory and moto

Question 3

nuclei of the trigeminal nerve

Answer 3

3 Sensory (Chief, mesencephalic, spinal)
1 Motor (trigeminal)

Question 4

what is the trigeminal nerve derived from

Answer 4

1st pharyngeal arch

Question 5

Ophthalmic CNV1

Answer 5

sensory nerve of the orbit and surrounding area
passes through superior orbital fissure
lateral wall of cavernous sinus

Sensory: Eye, Forehead, Part of Nasal Cavity, Paranasal Sinuses, Meninges (Dura mater)

Question 6

MAXILLARY CNV2

Answer 6

Sensory nerve of the pterygopalatine fossa, nose and
surrounding area

passes through the foramen rotundum
lateral wall of cavernous sinus

Question 7

Mandibular CNV3

Answer 7

Sensory nerve of the oral cavity, parotid gland and
surrounding area

passes through foramen ovale into the infratemporal fossa

DOES NOT pass through cavernous sinus

Question 8

nuclei of the facial nerve

Answer 8

1 Special Sensory (nucleus solitaris)
1 Motor (facial)
1 parasympathetic (superior salivatory nucleus)

Question 9

facial nerve attachment to the brainstem

Answer 9

Ventrolateral to the Pontomedullary junction

Question 10

major branches of the facial nerve

Answer 10

Greater petrosal (parasympathetic)
Chorda tympani (special sense and parasympathetic)
Motor trunk (main portion will branch further)

Question 11

ganglia of the facial nerve

Answer 11

Geniculate in petrous temporal bone

Question 12

facial nerve is derived from…

Answer 12

2nd pharyngeal arch

Question 13

where does the glossopharyngeal nerve attach to the brain stem

Answer 13

medulla oblongata posterior to the olive

Question 14

nuclei of the GP nerve

Answer 14

Sensory – nucleus solitarius and spinal tract of trigeminal nucleus
Parasympathetic – inferior salivatory nucleus (parotid gland)
Motor – nucleus ambiguus

Question 15

ganglia of the GP CN

Answer 15

superior (jugular) and inferior (petrosal)

Question 16

GP CN is derived from?

Answer 16

3rd pharyngeal arch

exits by the jugular foramen

Question 17

nuclei of the vagus nerve

Answer 17

Sensory – spinal tract of trigeminal nucleus
Parasympathetic – dorsal motor nucleus of vagus
Motor – nucleus ambiguous

Question 18

vagus nerve and attachment to brainstem?

Answer 18

medulla oblongata posterior to the olive

Question 19

ganglia of the vagus nerve

Answer 19

superior (nodose) and inferior

Question 20

where does the vagus nerve exit the skull

Answer 20

jugular foramen

Question 21

about the accessory nerve

Answer 21

exits by the jugular foramen
enters by the foramen magnum

travels down the neck

Question 22

about the hypoglossal nerve

Answer 22

Hypoglossal nucleus located in the medulla oblongata close to the dorsal motor nucleus of the vagus

Attaches to the brainstem at the sulcus between the olive and pyramid

Exits cranial cavity through hypoglossal canal

Question 23

Damage to corticobulbar fibers that project to the
hypoglossal nucleus

central lesion vs hypoglossal lesion

Answer 23

central = contralateral deviation of the tongue during protrusion

hypoglossal nerve lesion = ipsilateral deviation of the tongue during protrusion

Question 24

The upper motor neuron lesion (corticobulbar lesion)

Answer 24

spares the upper face

weakness is seen in the contralateral lower face

in a unilateral corticobulbar lesion.. the patient can still wrinkle forehead

Question 25

The lower motor neuron lesion (facial nerve lesion)

Answer 25

does not spare the upper face

weakness is seen in the ipsilateral upper and lower face

In a lesion affecting the facial nerve, both
upper and lower facial muscles are paralyzed (facial
LMN syndrome –e.g. Bell’s palsy).