Motor neuron

Motor neurons were neurons in the central nervous system that controlled muscles.

An ethorin pulse could be used in surgery to stabilize a patient's motor neurons. 

In 2372, The Doctor stimulated the motor neurons on Denara Pel's body, while simultaneously making a clumsy attempt to romance her holographic counterpart. 

When Neelix was resurrected with Borg nanoprobes in 2374, The Doctor had to stabilize his motor neurons by reducing his acetylcholine levels. 

In 2376, after apparent dark matter lifeforms had entered William Telfer's body and briefly immobilized him, they activated his motor neurons and allowed him to pass through a force field.