Corticospinal tract

Question 1

What are the two divisions of the corticospinal tract

Answer 1

the lateral and the anterior corticospinal tracts

Question 2

What is the function of the lateral corticospinal tract

Answer 2

skilled movements of the extremities

Question 3

What is the function of the anterior corticospinal tract

Answer 3

postural adjustment

Question 4

What is the somatotopic arrangement of the corticospinal tract

Answer 4

lower levels of the cord are found laterally and higher levels of the cord are found medially

Question 5

What arteries supply the corticospinal tract

Answer 5

the anterior and posterior spinal arteries

Question 6

What is the path of the corticospinal tract in the cortex

Answer 6

originates in the motor cortex, descending fibres form the corona radiata and converge to pass through the posterior limb of the internal capsule 3

Question 7

The corticospinal tract descends through which part of the midbrain and medulla?

Answer 7

anterior

Question 8

What occurs to the corticospinal tract at the junction of the medulla and the spinal cord

Answer 8

most (85-90%) of the fibres cross the midline in the decussation of the pyramids

Question 9

The fibres which cross the midline at the decussation of the pyramid form the ___

Answer 9

lateral corticospinal tract

Question 10

The fibres which dont cross the midline at the decussation of the pyramid form the ___

Answer 10

anterior corticospinal tract

Question 11

When does the anterior corticospinal tract fibres cross the midline

Answer 11

at the level where they terminate on their LMNs