The correct answer for the question is option a.
Explanation: Skilled movement is controlled by the pathway involving upper motor neurons in the motor cortex through lower motor neurons in the lateral ventral horn on the ipsilateral (same) side.
In this pathway, the primary motor cortex, located in the frontal lobe of the cerebral cortex, sends signals through upper motor neurons that descend to synapse with lower motor neurons in the spinal cord. These lower motor neurons are located in the lateral ventral horn of the spinal cord gray matter.
The descending signals from the upper motor neurons provide instructions for voluntary and skilled movements. The synapse with lower motor neurons allows for direct control of muscles involved in executing those movements.
Therefore, option a accurately describes this pathway: Upper motor neurons in the motor cortex through lower motor neurons in lateral ventral horn on the ipsilateral side.
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