Deep rTMS for Treatment-Resistant Late-life Depression

In the sham treatment,the electrical field induced by the sham coil cannot invoke any action potentials and if no action potentials are induced, then the electric field is insignificant and there is no treatment effect on the brain.

Deep Transcranial Magnetic Stimulation (DTMS) is a new form of TMS which allows direct stimulation of deeper neuronal pathways than the standard TMS. The H-coil is a novel DTMS coil designed to allow deeper brain stimulation without a significant increase of electric fields induced in superficial cortical regions