Final answer:
The corticospinal tract (CST) is responsible for control of proximal musculature. It is a descending pathway that connects the motor cortex of the brain with the spinal cord, allowing for voluntary movement of skeletal muscles.
Step-by-step explanation:
The corticospinal tract (CST) is responsible for control of proximal musculature. It is a descending pathway that connects the motor cortex of the brain with the spinal cord, allowing for voluntary movement of skeletal muscles. The CST is largely contralateral, meaning that it crosses over to the opposite side of the spinal cord from which it originates.