Final answer:
The pyramidal tract for motor control is the corticospinal tract, which directly facilitates voluntary movements, while the extrapyramidal tracts are composed of indirect pathways from the brainstem and influenced by the basal nuclei for movement modulation.
Step-by-step explanation:
The pyramidal tracts of the brain involved in motor neuron control include the corticospinal tract, while the extrapyramidal tracts include pathways influenced by subcortical structures, such as those originating from the brainstem and influenced by the basal nuclei. The corticospinal tract is composed of an upper motor neuron, which has its cell body in the primary motor cortex and synapses on the lower motor neuron located in the ventral horn of the spinal cord. This pathway facilitates voluntary movements of skeletal muscles. The extrapyramidal system, however, modulates movements and is involved in the regulation of movement initiated by the central nervous system, without direct control over voluntary muscles.
The corticospinal tract descends through the white matter of the cerebrum and passes key structures such as the internal capsule, cerebral peduncles, and the pyramids of the medulla. It controls skeletal muscle movements, and has ipsilateral corticobulbar fibers and largely contralateral corticospinal fibers, ensuring the right motor cortex controls muscles on the left side of the body and vice versa. Extrapyramidal controls, on the other hand, have more diffuse and indirect pathways, significantly influenced by the basal nuclei and thalamic feedback to the motor cortex.