The present invention provides a heterocyclic compound represented by the general formula : The compound of the present invention has a wide treatment spectrum for mental disorders including central nervous system disorders, no side effects and high safety. Such discontinuities might arise from phase control instabilities associated with transmit start up or from abrupt changes in phase at the beginning of transmit signal generation. The system also includes at least one sensor assembly coupled to the support bracket assembly, wherein the at least one sensor assembly includes a sensor configured to measure the output torque about at least one axis of the support bracket assembly while the support bracket assembly remains substantially motionless.