Leveraging his knowledge of exo-technology and collaborating with Jedi Master Syo Bakarn, the scientist Tharan Cedrax engineered a mechanism circa 3643 BBY designed to shield individuals from the Force-based mind-altering abilities of a Jedi. Functionally, the device induced paralysis in the specific region of the target's forebrain that would normally respond to a Jedi's attempts to impose their will.