Lateral Motor Systems (Descending)

Question 1

The site of origin for Lateral Corticospinal Tract

Answer 1

The primary motor cortex and other frontal and parietal areas

Question 2

The site of decussation for the Lateral Corticospinal Tract

Answer 2

Decussation in the pyramidal cells of the cervicomedullary junction

Question 3

Where does the termination of the Lateral Corticospinal Tract end

Answer 3

In the entire spinal cord, predominantly at the cervical and lumbosacral enlargements (in the lateral intermediate zone and lateral motor nuclei of the anterior horn)

Question 4

What is the function of the Lateral Corticospinal Tract

Answer 4

Movement of contralateral limbs

Question 5

The site of origin for the Rubrospinal Tract

Answer 5

Red Nucleus (in the midbrain)

Question 6

The site of decussation for the Rubrospinal Tract

Answer 6

Ventral tegmental decussation (in the midbrain) then moves down spine through the lateral column

Question 7

Where does the termination of the Rubrospinal Tract end

Answer 7

Cervical spinal cord (lateral intermediate zone and lateral motor nuclei of the anterior horn)

Question 8

What is the function of the Rubrospinal Tract

Answer 8

Movement of contralateral limbs (UE?)

Question 9

What motor tracts are included in the lateral motor systems

Answer 9

Lateral Corticospinal Tract

Rubrospinal Tract