| A portable electronic monitoring device proposed in 1964 by Dr. Ralph K. Schwitzgebel, widely credited as a forebear of the now-commonplace ankle bracelets used in house arrest programs. The Schwitzgebel Machine used brain implants to sense and report a variety of physical and neurological data, which could be monitored at a distance of up to a quarter mile, and utilised modified missile tracking technology to report the location of its wearer.
Mind control and alien abduction theorists, such as Gordon Thomas1 and Martin Cannon,2 suggest that the Schwitzgebel Machine was capable of not only receiving information from an individual fitted with such brain implants, but also of being used for transmission of verbal instructions (via aural implants) and remote electronic stimulation of the brain.
1Thomas, Gordon. Journey into Madness: The True Story of Secret CIA Mind Control and Medical Abuse. New York: Bantam Books, 1989.
2Cannon, Martin. "The Controllers: A New Hypothesis of Alien Abduction." Retrieved 15 June, 2001 from the World Wide Web: http://www.visitations.com/cannon/cannon.htm | 
