Medulla

Question 1

Ascending sensory pathway through the brainstem

Answer 1

Spinothalamic

Question 2

For the gag reflex, CN ____ does the sensing, whereas CN_____ does the moving

Answer 2

9.10

Question 3

The cotricobulbar UMN pathway is bilateral for most, expect it’s crossed for 12 and 9; and ipsilateral for CN _____

Answer 3

XI

Question 4

When the interal arcuate fibers are visible, what is the somatotopy of the medulla’s DCMLS?

Answer 4

Arms most dorsal

Thorax

Legs most ventral

(standing person)

Question 5

Descending motor pathway traveling through the brainstem

Answer 5

Corticospinal

Question 6

The two cranial nerves in the midbrain are ____ and ____

Answer 6

-3 and 4

Question 7

Descending motor pathway that ends in the brainstem (synapses)

Answer 7

Corticobulbar

Question 8

The fourth ventricle is shared between the ____ and _____

Answer 8

• Pons - Medulla

Question 9

3 Sensory Cranial Nerves

Answer 9

1, 2, 8

Question 10

The cerebral aqueduct is associated with the ______

Answer 10

Midbrain

Question 11

Name the 4 Cisterns

Answer 11

A: Interpeduncular

B: Quadrigeminal

C: Magna

D: Prepontine

Question 12

Clinical significance of spacing regarding DCMLS and Spinothalamic in Medulla vs Midbrain

Answer 12

In the midbrain they are close together, so you would see complete loss of function. In the medulla they are split up, so you would see opposing functions being lost

Question 13

One motor and one sensory pathway will travel through the medulla. Can you name these?

Answer 13

1. Corticospinal
2. Spinothalamic

Question 14

The motor cranial nerves all travel _____laterally

Answer 14

Ipsi

Question 15

The descending sympathetic pathway (dilates eyes via pupillary dilator muscle), travels in the _____ brainstem

Answer 15

Lateral

Question 16

4 Midline Cranial Nerve

Answer 16

3, 4, 6, 12

Question 17

In regards to the rule of 4’s, once you know the midline nerves, you know that the three nerves associated with the pons are

Answer 17

5, 7, 8

Question 18

One motor and one sensory pathway will make synapses in the medulla. Can you name them?

Answer 18

1. Corticobulbar
2. DCMLS

Question 19

In the upper/rostral medulla’s pyramids, what are the 3 somatotropes from lateral to medial?

Answer 19

1. Legs
2. Trunk
3. Arms

Question 20

4 mixed cranial nerves

Answer 20

5, 7, 9, 10

Question 21

In regards to sensory nuclei in the brain stem, they tend to be more _____

Answer 21

Lateral

Question 22

In regards to motor nuclei in the brainstem, they are located more ______

Answer 22

Medial

Question 23

Key difference in histo slide of closed medulla vs open medulla

Answer 23

• Wormy in Open medulla of Inferior Nuclei

Question 24

Cranial Nerve signs are always ____lateral to the lesion

Answer 24

Ipsi

Question 25

The Dorsal caudal medulla is great for observing the DCMLS tracts. Laterally, is the _____ Tubercle along with the fasciculus inferior to it.

Answer 25

Cuneate

Question 26

Clinical relevance of the DCMLS travelling more lateral after it crosses in lower-medulla?

Answer 26

Medial lesions above the lower medulla won’t affect the DCMLS pathways

Question 27

From medulla’s ventral view, starting lateral, the three bumps are ____, ____, ____,

Answer 27

• Inferior Cerebellar Peduncle - Olive - Pyramids

Question 28

In regards to the rule of 4’s, once you know the midline nerves, you know that the three nerves associated with the medulla are

Answer 28

9, 10, 11

Question 29

Starting from the most top (dorsal), name the key 4 landmarks of the Rostral/Open medulla

Answer 29

1. 4th Ventricle
2. Inferior Cerebellar Peduncle
3. Olive
4. Pyramid

Question 30

5 motor cranial nerves

Answer 30

3, 4, 6

11, 12