Cortical Stimulator

The cortical stimulator is a medical device used to revive neural activity in the nervous system of critical patients. It works by delivering an electrical shock, which if effective, induces brain activity.
It is usually attached to the temples or foreheads of humanoid beings. Cortical stimulators were standard equipment in the Sickbays of Starfleet vessels in the 24th century.

Examples:

• In 2364, Doctor Beverly Crusher used a cortical stimulator in an attempt to revive Lieutenant Natasha Yar after her Line of Duty Death.

• In 2370, Doctor Julian Bashir revived Quark with a cortical stimulator after he suffered trauma from being shot.

• In 2373, The Doctor used a cortical stimulator on Captain Kathryn Janeway when she suffered a near-fatal injury.