The pyramidal motor tract carries signals from the motor cortex of each cerebral hemisphere to _______ side(s) of the spinal cord, whereas the extrapyramidal motor tracts carry signals from various subcortical structures to _______ side(s) of the spinal cord.
A)the ipsilateral; both the ipsilateral and contralateral
B)both the ipsilateral and contralateral; the ipsilateral
C)the contralateral; both the ipsilateral and contralateral
D)both the contralateral and ipsilateral; the contralateral

Question

Quizplus · Accepted Answer

The pyramidal motor tract primarily carries motor signals from the motor cortex to the contralateral side of the spinal cord, meaning it crosses over to the opposite side. The extrapyramidal motor tracts, on the other hand, originate from various subcortical structures and can project to both the ipsilateral and contralateral sides of the spinal cord, providing a more complex and less direct system of motor control.

The Pyramidal Motor Tract Carries Signals from the Motor Cortex