The positioning of the coil on the scalp is probably not the only stimulation parameter that can be improved. The efficacy of rTMS therapy could also be improved by measuring the depth of the cortex, in order to adjust the motor threshold (MT) to obtain the same degree of excitability at the DLPFC. The MT, used to determine the intensity of stimulation required for each patient according to their own cortical excitability, corresponds to the minimal intensity required to elicit contraction of the thumb when the coil is positioned on the scalp above the motor cortex. Therefore, it only reflects the intensity required for the magnetic field of the coil to reach the motor cortex at a precise distance from the scalp. As the distance from the scalp to the motor cortex can be different from that to the DLPFC, the intensity needs to be adjusted.