The fourth and only non-invasive neurostimulation
technique, low frequency rTMS, is thought to sup-press cortical excitability either via inducing long term
depression or alternatively by enhancing GABAergic
inhibition.
62Although evidence for its efficacy is lim-ited, a number of small-scale studies suggest antiepi-leptic properties (see Fregni and Pascual-Leone for a
comprehensive review)