sentences:  The Hesed (H-core), circular crown and double cone coils allow deeper magnetic penetration than the standard 2 cm.They can impact deeper areas in the motor cortex and cerebellum controlling the legs and pelvic floor, for example, though the increased depth comes at the cost of a less focused magnetic pulse.Luigi Galvani (1737-1798) undertook research on the effects of electricity on the body in the late-eighteenth century and laid the foundations for the field of electrophysiology.