Motor neuron, final pathways of the motor pathway system, innervation of muscle fibers. Motor neurons are cells that control the movement of the body. The motor neuron is also called a motor neuron. it is represented in purple. The motor neuron ends in a kind of button or synapse, connected to muscle fibers. This connection is made at an area called the neuromuscular junction. This type of neuron is a nerve cell allowing all movement control. It is present in the spinal cord. It controls the muscles through the peripheral nerve.