Spinal cord tracts

Question 1

Descending tract?

Answer 1

voluntary Motor

Question 2

Ascending tract?

Answer 2

Sensory

Question 3

ANy cranial nerve that is doing motor are what?

Answer 3

Lower motorneurons

Question 4

Lateral Cortico spinal tract terminates ___________.

Answer 4

Epsilaterally

Question 5

Anterior Corticospinaltract terminates _________.

Answer 5

Bilaterally

Question 6

Lateral Cortico spinal tract does ____ and rest of body.

Answer 6

limbs

Question 7

Anterior corticospinal tract does _____.

Answer 7

axials

Question 8

True/False: more distal part of limbs are more distal part of horn.

Answer 8

True

Question 9

Lateral corticospinal tract how do fibers run?

Answer 9

Lateral CS tract descends in lateral funiculus and go opposite anterior horn. Serves limbs contralateral to cortex.

Question 10

If you damage CST rostral to pyramidal decussation where is the weakness?

Answer 10

The damage is contralateral to the lesion.

Left side lesion causes right side weakness

Question 11

LCST damage caudal to pyramidal decussation. Where is weakness?

Answer 11

The damage is ipsilateral to the lesion

Left side lesion is left side weakness.

Question 12

What does level down mean?

Answer 12

You get a deficit at that level and all the way down below the lesion.

Question 13

As long as LCST is intact, if there is damage to Anterior corticospinal tract, what happens?

Answer 13

there is no significant damage. Because LCST can compensate for damage of ACST

Question 14

If LCST is damaged, ACST can support axial movement but can not compensate for ______.

Answer 14

limbs

Question 15

Weakness in muscles served by L1-L4 but intact motor function muscles served by levels L1 and below L4.

Answer 15

Segmental deficit

Question 16

If there is a deficit in horn vs. tract damage.

Answer 16

Can’t have level down with horn damage. Can with tract damage

Question 17

What is babinskis sign?

Answer 17

Upper motor neuron deficit. Extension of foot and toes also fan out (abduct). Abnormal.

Question 18

No atrophy, increased muscle tone, exaggerated reflexes, no fasciculations, Clonus.

Answer 18

Upper Motorneuron signs “spastic” weakness

Question 19

Muscle atrophy, decreased muscle tone, decreased reflexes, fasciculations.

Answer 19

Lower motor neuron signs. “Flaccid weakness”

Question 20

Is a touch fine/discriminative or just position sense. Know difference. What is a couple ways to test this?

Answer 20

2-point discrimination test (compas like object) can pt tell difference between the 2 points
Identify a coin
On face trace letters.
Vibration: tuning fork on bony prominences (elbow, ankle)