Devices to alter consciousness

thumb|Declassification|Declassified MKUltra documents

thumb|Biofeedback device for treating posttraumatic stress disorder

thumb|470x470px|Neurofeedback training process diagram

weapon that uses soundwaves to discomfort, capacitate or kill opponents

device used for relaxation

technological devices that connect directly to a biological subject's brain

thumb|An anonymous example of a makeshift Dreamachine The Dreamachine (a contraction of Dream Machine), invented in 1959 by Brion Gysin and Ian Sommerville, is a stroboscopic flickering light art device that produces eidetic visual stimuli.

light producing regular strong flashes of light

Neurohacking is a subclass of biohacking, focused specifically on the brain. Neurohackers seek to better themselves or others by "hacking the brain" to improve reflexes, learn faster, or treat psychological disorders. The modern neurohacking movement has been around since the 1980s. However, herbal supplements have been used to increase brain function for hundreds of years. After a brief period marked by a lack of research in the area, neurohacking started regaining interest in the early 2000s. Currently, most neurohacking is performed via do-it-yourself (DIY) methods by in-home users.

experimental apparatus developed by Stanley Koren and Michael Persinger

meditation device using flicker light stimulation