The instrument used to increase neural activity in the central nervous system of a dying humanoid brain. When Natasha Yar was critically wounded by Armus, a neural stimulator was used as part of direct reticular stimulation in an unsuccessful attempt to revive the gravely injured Lieutenant. On stardate 45349.1, Professor Berlinghoff Rasmussen pilfered a neural stimulator from the U.S.S. Enterprise NCC-1701-D's sickbay.