Sheet 10

Question 1

The Trigeminal nerve supplies the entire face except for:

Answer 1

Angle of mandible (by great auricular nerve)

Question 2

Where is the motor nucleus of the Trigeminal nerve found?

Answer 2

Posterior part of the pons (medial)

Question 3

Where is the main sensory nucleus of the Trigeminal nerve found?

Answer 3

Posterior part of the pons (lateral)

Question 4

Where is the spinal nucleus of the Trigeminal nerve found?

Answer 4

Superiorly: Main sensory nucleus (end at MP area)
Inferiorly: C2 segment

Question 5

Where is the mesencephalic nucleus of the Trigeminal nerve found?

Answer 5

Lateral: part of the gray matter around the cerebral aqueduct
Inferiorly: main sensory nucleus

Question 6

What is the modality of the main sensory nucleus?

Answer 6

Discriminative and light touch of the face as well as conscious proprioception

Question 7

What is the modality of the spinal nucleus?

Answer 7

Crude touch, pain, and temperature

Question 8

What is the modality of the mesencephalic nucleus?

Answer 8

Reflex proprioception of the periodontal ligament and of the muscles of mastication in the jaw

Question 9

Where are the cell bodies of the Trigeminal nerve found?

Answer 9

In the Trigeminal sensory ganglia

Question 10

Where are the ascending branches of the Trigeminal nerve found?

Answer 10

Main sensory nucleus

Question 11

Where are the descending branches of the Trigeminal nerve found?

Answer 11

Spinal nucleus

Question 12

What does the ophthalmic branch of the trigeminal nerve occupy?

Answer 12

Inferior part of spinal nucleus

Question 13

What does the maxillary branch of the trigeminal nerve occupy?

Answer 13

Middle part of SN

Question 14

What does the Mandibular branch of the trigeminal nerve occupy?

Answer 14

Superior part of SN

Question 15

What is the motor nucleus located next to?

Answer 15

Medial to main sensory nucleus

Question 16

The motor nucleus of the trigeminal nerve receives fibers from:

Answer 16

1) Corticonuclear tract

2) Red nucleus
3) Reticular formation
4) Tectum

Question 17

The mandibular division of the trigeminal nerve supplies: !!!

Answer 17

1) Muscles of mastication (masseter, temporalis, medial pterygoid, and lateral pterygoid)
2) Tensor Tympani
3) Tensor veli palatini
4) Mylohyoid
5) Anterior belly of the digastric muscle

Question 18

What happens in the middle cranial fossa?

Answer 18

The sensory and motor roots expand into the trigeminal ganglion

Question 19

Where is the trigeminal ganglion located?

Answer 19

Lateral to the cavernous sinus in a depression called Meckel’s cave (pouch of dura mater)

Question 20

The ophthalmic branch will go through:

Answer 20

Superior orbital fissure

Question 21

The maxillary branch will go through:

Answer 21

Foramen rotundum down to pterygopalatine fossa

Question 22

The Mandibular branch will go through:

Answer 22

Foramen ovale to infratemporal fossa

Question 23

The upper part of the face receives upper facial motor neurons from:

Answer 23

Both hemispheres

Question 24

The lower part of the face receives upper facial motor neurons from:

Answer 24

The contralateral hemisphere

Question 25

The parasympathetic nuclei of the facial nerve receives fibers from:

Answer 25

Salivatory: Hypothalamus
Lacrimal: Hypothalamus and Trigeminal sensory nuclei

Question 26

Where do the sensory nuclei (1st order) of the facial nerve synapse?

Answer 26

Nucleus of tractus solitarius

Question 27

Where are the cell bodies of the 1st order neurons for the facial nerve found?

Answer 27

Geniculate ganglia

Question 28

Where does the sensory part of the facial nerve go?

Answer 28

To the VPM nucleus of the thalamus, then to the primary gustatory cortex (area 43) of the parietal

Question 29

General sensation from the skin of the _____ is carried with the facial nerve (geniculate ganglion) into:

Answer 29

External acoustic meatus; spinal trigeminal nucleus

Question 30

The facial nerve emerges from the:

Answer 30

Pontomedullary junction

Question 31

What are the 2 facial branches in the tympanic cavity?

Answer 31

1) Chorda tympani

2) Greater petrosal

Question 32

What happens if there is a lesion in the pons?

Answer 32

Abducens and facial nerve don’t work

Question 33

What happens if there is a lesion in the internal acoustic meatus?

Answer 33

Vestibulocochlear and facial nerve don’t work

Question 34

What happens if there is a lesion in the chorda tympani?

Answer 34

Loss of taste over the anterior 2/3 of the tongue

Question 35

If there is an upper motor neuron lesion, then the paralysis will be:

Answer 35

Contralateral lower part paralysis

Question 36

If there is a lower motor neuron lesion, then the paralysis will be:

Answer 36

Ipsilateral lower half paralysis

Question 37

What is Bell’s palsy?

Answer 37

Unilateral lower facial motor neuron paralysis.

Question 38

What happens if there’s injury to the glossopharyngeal nerve?

Answer 38

1) Loss of gag reflex
2) Loss of carotid sinus reflex
3) Loss of taste from posterior 1/3 of tongue