The control was apparently an element of the secondary neural processing network but drawing power from a protected reserve buss, in the primary cerebral circuit. The control was in a primary module with attachment points which were plastic pins chemically bonded to the spinal framework. The housing was constructed of a hermetically sealed yurium membrane that was independent of the enclosed environment of the upper torso. Due to Data being regarded as a sentient being, few people knew of the control's location, although it was detailed in his schematics.