Descending Motor Pathways: Lateral-Corticospinal tract

Question 1

Corticospinal tract

Answer 1

is a white matter motor pathway starting at the cortex that terminates on motor neurons in the spinal cord, controlling movements of the limbs and trunk.

Question 2

Corticospinal track…(movement/direction)…at the in the….

Answer 2

Decussate at pyramids in medulla

Question 3

Terminate in

Answer 3

gray matter of spinal cord

Question 4

Primarily control movements of thw

Answer 4

Fingers, hands, arms, lower legs, feet, and toes

Question 5

When both pyramidal tract are cut in monkeys

Answer 5

i. they recover ability to walk and climb

ii. fine motor control of hands is impaired