#$%^&*AU2019202265A120191024.pdf#####ABSTRACT 5 A apparatus and method of modulating a brain activity of a mammal is achieved by subjecting the mammal to repetitive transcranial magnetic stimulation (rTMS) at variable pulse intervals for a time sufficient to modulate said brain activity. Improvement in a physiological condition or a clinical condition is achieved. Conditions to be treated include but are not limited 0 to PTSD, autism spectrum disorder and Alzheimer's disease. Wavelet transform analysis is used to determine the variable pulse intervals employed. 10Ti T2 T3 Tn Ao Al A2 A3 An C2 101 Ci C3 n 102 D2 D3 FIG. 1 303 201 304 202 FIG. 2