1. A Transcranial Magnetic Stimulation (TMS) method for stimulating a brain region deep within a patient's brain, the method comprising: positioning a first TMS electromagnet outside of a patient's head; determining the distance between a target deep brain region and a sulcus, wherein the sulcus is within the range of a magnetic field emitted by the first TMS electromagnet; determining the direction of a pathway through the sulcus to the target deep brain region; determining stimulation parameters for the first TMS electromagnet based on the distance between the target brain region and the sulcus and based on the direction of the pathway through the sulcus to the target deep brain region; and applying energy to the first TMS electromagnet at the determined stimulation parameters.