Brainstem

Question 0

What sulcus and funiculus is only present above T6?

Answer 0

Dorsal intermediate sulcus

Fasciculus cuneate

Question 1

What marks left and right sides of the dorsal spinal cord?

Answer 1

Dorsal median sulcus

Question 2

Where is the spinal thalamic tract STT located?

Answer 2

Right off of the ventral horn

Question 3

What is Lissauer’s tract and where is it located?

Answer 3

Also called dorsolateral fasciculus of Lissauer
Located right off of the dorsal horn next to the fasciculus gracillus

First order pain and temperature neurons that ascend or descend one or two segments and terminate in the dorsal horn

Question 4

Where do the axons from the STT have their cel bodies?

Answer 4

In the contralateral posterior(dorsal) horn

Question 5

What information does the STT carry?

Answer 5

Second order pain and temperature

Question 6

Where does the STT cross the midline?

Answer 6

The anterior white commissure

Question 7

Where does the STT terminate?

Answer 7

VPL of the thalamus

Question 8

What information does the F. Gracillus and F. Cuneate carry?

Answer 8

Proprioceptive, discrimitive touch, and vibration

From the lower body and upper body respectively

Question 9

Where to the axons in the F. Gracillus and F. Cuneate have their cell bodies?

Answer 9

In the DRG

Question 10

Where do the F. Gracillus and F. Cuneate terminate?

Answer 10

In the caudal medulla

Both ipsilateral

Question 11

What color are the nucleuses in the stained cross sections?

Answer 11

White, while the tracts are more purple and more lateral

Question 12

The nucleus of what CN is in the caudal medulla?

Answer 12

The spinal nucleus of CN V

Question 13

What does the spinal nucleus of CN V contain?

Answer 13

The cell bodies of the second order neurons of pain and temp neurons that cross the midline to ascend to the VPM

Question 14

What does the spinal tract of CN V contain?

Answer 14

First order neurons from the trigeminal ganglion

Question 15

What information does the spinal tract of CN V carry?

Answer 15

Pain, temp, and crude touch sensation

Question 16

What does the spinal tract of CN V pass through to enter the brainstem?

Answer 16

The middle cerebellar peduncle

Question 17

Where does the medial lemniscus begin?

Answer 17

The caudal medulla

Question 18

What does the medial lemniscus carry?

Answer 18

Second order neurons whose cell bodies are located in the gracile and cuneate nucleus of the caudal medulla
Propreoceptive, touch, and vibration from contralateral body to the thalamus (VPM)

Question 19

Where does the STT terminate?

Answer 19

VPL

Question 20

Where are the mesencephalic and main sensory nucleuses located?

Answer 20

In the pons by the fourth ventricle

Question 21

In the pons, where is the STT in relation to the medial lemniscus?

Answer 21

Directly lateral

Question 22

Where does the medial lemniscus terminate?

Answer 22

The VPM

Question 23

Where is the medial lemniscus in the midbrain?

Answer 23

On the outside

Question 24

What does the trigeminothalamic tract contain?

Answer 24

Second order neurons whose cell bodies are located in the spinal trigeminal nucleus and the main sensory nucleus
Terminate in the VPM

Question 25

Where do the internal arcuate fibers come from and go, and in what section?

Answer 25

Axons of second order neurons from the gracile and cuneate nucleuses going to the medial lemniscus

Question 26

What would a lesion in the inferior colliculus in the midbrain do?

Answer 26

Diminished hearing

Question 27

Where does the the sensory info like touch cross?

Answer 27

(Gracile, cuneate)

Lower medulla

Question 28

What brainstem nuclei carries sensory information from the teeth?

Answer 28

The main sensory nucleus of the trigeminal nerve