CNS Pathways

Question 1

Regarding the spinothalamic tract, where are the 3 neurons located?

Answer 1

1 - DRG
2- SPC
3- Thalamus

Question 2

Regarding the DCML, where are the 3 neurons located?

Answer 2

1 - DRG
2- Medulla
3- Thalamus

Question 3

Regarding the DCML, what neuron crosses the spinal cord? Above T5, neurons are within which fasciculus? After T5?

Answer 3

2nd order neuron (AT MEDULLA)
Above - Cuneate
Below - Gracile

Question 4

The DCML detects what type of information?

Answer 4

Vibration
2 pt discrimination
Position sense and kinesthesia

Question 5

Non-conscious propioception is conveyed by _ tract. What are the 2 components?

Answer 5

Spino-cerebellar

DSCT/VSCT

Question 6

Corticobulbar UMNs synapse on _, which corticospinal UMNs synapse on _

Answer 6

CN nuclei

LMNs

Question 7

A major component of the internal capsule is _

Answer 7

UMNs

Question 8

Weakness, hyper-reflexia, hypertonia and neonatal reflexes are signs of _

Answer 8

UMN damage

Question 9

Majority of decussated UMN to the spinal cord form _

Answer 9

The lateral corticospinal tract (lateral funiculus)

Question 10

Paralysis, decreased reflexes, muscle atrophy and fasciculations are signs of _

Answer 10

LMN damage

Question 11

Brown sequard syndrome is _

Answer 11

Where the entire half of the spinal cord is damaged.