One possible reason for these partial effects on nicotine consumption might be the superficial magnetic stimulation induced by the figure-8 coil, which does not reach into the deep layers of the cortex. It is known that nicotine addiction involves various areas of the brain reward system. Most of them are deeper than the superficial layers of the cortex, like the anterior cingulated, orbitofrontal cortex, nucleus accumbens, and amygdala.