Ascending sensory pathways 2

Question 1

What is the main nerve carrying sensation from the head?

Answer 1

Trigeminal nerve

Question 2

What are the three branches of the trigeminal nerve?

Answer 2

ophthalmic
maxillary
mandibular

Question 3

What are the two modalities carried within the trigeminothalamic tract?

Answer 3

1. essential to survival

2. increase in detail

Question 4

where are cranial nerve nuclei located?

Answer 4

in the brainstem

Question 5

Which four cranial nerves is general sensation of the head carried in?

Answer 5

Trigeminal (5)
Facial (7)
Glossopharyngeal (9)
Vagus (10)

Question 6

which central pathway do cranial nerves 5,7,9 and 10 travel in?

Answer 6

Trigeminothalamic

Question 7

How many parts does a trigeminal nucleus have?

Answer 7

3

Question 8

What are the three parts to the trigeminal nucleus?

Answer 8

Mesencephalic
Pontine (chief principle)
Spinal

Question 9

Where is the mesencephalic nucleus located?

Answer 9

Midbrain (cerebellar peduncles)

Question 10

Where is the pontine nucleus located?

Answer 10

pons

Question 11

Where is the spinal nucleus located?

Answer 11

Medulla

Question 12

Which nucleus receives pain and temperature modalities?

Answer 12

Spinal nucleus - caudal part

Question 13

Which sensory modalities does the rostral part of the spinal nucleus receive?

Answer 13

Simple touch and pressure

Question 14

In the pain and temp pathway where does the first neurone pass in to?

Answer 14

The pons

Question 15

In the pain and temp pathway where is the cell body?

Answer 15

In the trigeminal ganglion

Question 16

What happens to the primary fibres in the spinal tract of the pain and temp pathway?

Answer 16

They descend in the spinal tract, adjacent to the spinal nucleus

Question 17

Where do the primary fibres enter the spinal nucleus in the pain and temp pathway?

Answer 17

The caudal pole of the spinal nucleus

Question 18

In the pain and temp pathway, where does the primary neurone synapse with the secondary neurone?

Answer 18

In the caudal part of the spinal nucleus

Question 19

What does the second neurone do in the pain and temp pathway?

Answer 19

Crosses the midline and ascends to the thalamus

Question 20

What tract does the secondary neurone travel in?

Answer 20

The Trigeminothalamic tract

Question 21

In the touch and pressure pathway where does the primary neurone enter the nucleus?

Answer 21

Spinal nucleus - Rostral end

Question 22

Where does the primary neurone synapse with the secondary neurone in the touch and pressure pathway?

Answer 22

In the rostral end of the spinal nucleus

Question 23

which artery runs near the cerebellarpontine angle?

Answer 23

The anterior inferior cerebellar artery

Question 24

In the discriminatory touch pathway where does the cell body lie?

Answer 24

In the trigeminal ganglion (outside the brainstem)

Question 25

Where does the primary neurone of the discriminatory touch pathway enter the brainstem?

Answer 25

Into the pons - then straight into the pontine nucleus

Question 26

Where does the primary neurone of the discriminatory touch pathway enter the nucleus?

Answer 26

At the pontine nucleus straight away, it does not descend

Question 27

Which tract does the secondary neurone of the discriminatory touch pathway ascend in?

Answer 27

The trigeminothalamic tract to the thalamus

Question 28

Which pathway has its cell bodies of primary neurone in the brainstem?

Answer 28

Proprioception pathway

Question 29

Where is the cell bodies of primary neurones in the proprioception pathway?

Answer 29

In the mesencephalic nucleus - in the midbrain

Question 30

Where does the primary neurone synapse with the secondary neurone in the proprioception pathway?

Answer 30

Outside the mesencephalic nucleus - adjacent to it in the pons

Question 31

Which tract does the secondary neurone of the proprioception pathway travel in?

Answer 31

The trigeminothalamic tract