Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light."

Flicker vertigo has been considered as a principle for various forms of non-lethal weapon.

A flickering pattern called photic simulation, also known as flicker vertigo.

The strobe light effect causes persons who are vulnerable to flicker vertigo to become disoriented, lose control of the aircraft or have a seizure.

According to The US Naval Flight Surgeons Manual, flicker vertigo is a rare occurrence.

Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light."

• Seizure activity through the mechanism of "flicker vertigo"(caused by photic stimuli such as sunlight, propeller movement or aircraft strobe lights) Management:

Dr. Bucha", U.S. Army scientist who, in the 1950s, investigated tactical uses of helicopter flicker vertigo; may be an urban legend as no one knows his first name"

• Increased risk of seizure activity (see below) caused by "flicker vertigo" from strobe lights on aircraft A decrease in atmospheric pressure increases intracranial pressure, reducing blood flow.

Flicker vertigo in a helicopter occurs when the pilot or front passenger looks up through the blades of the main rotor as it turns in the sun causing the light to strobe.