Which part of the brain controls body functions related to skeletal muscles?

The cerebral cortex is responsible for the higher motor functions, specifically in the precentral gyrus or the Brodmann area 4 (primary motor cortex). The neurons from the primary motor cortex form a tract called the corticospinal tract which then will synapse to the lower motor neuron in the spinal cord then nerve fibers will synapse to the neuromuscular junctions of each muscle groups performing the voluntary action of muscles.