Neuro-electric energy was a force capable of regenerating damaged tissue. This energy form was utilized by the Borg in the form of a neuro-electric field, which allowed for the regeneration of both organic and inorganic body parts of injured drones. The field was produced by a neuro-electric field generator, a component of every Borg ship.
In 2373, the group of former drones known as "the Cooperative" utilized a neuro-electric field to heal Commander Chakotay, the first officer of the USS Voyager, who had sustained serious injuries after being fired upon by a particle weapon. (VOY: "Unity")