Proposed by the EPA Section on Old Age Psychiatry - Despite advances in psychopharmacology, up to 30% of patients with psychiatric condition continue to experience disabling symptoms despite being on medication. Thanks to their ability to modulate cerebral networks, non-invasive brain stimulation methods have been proposed as an alternative method to alleviate symptoms in patients with treatment resistant psychiatric conditions, especially depression, schizophrenia and substance use disorders. Non-invasive brain stimulation methods cover a broad range of approaches including electroconvulsivotherapy (ECT), repetitive transcranial magnetic stimulation (rTMS), transcranial electrical stimulation (tES: tDCS, tRNS, tACS, tSOS,…). The course will have four sections: 1) Overview of rTMS and tDCS methods -Brief presentations of their main indications in psychiatry (depression, schizophrenia and substance use disorders) and their place in the treatment algorithm, with a focus on the elderly 2) Practice exercises with the devices 3)General Discussion about strengths, weaknesses and gaps in adult as well as elderly population The goals of this course are to: 1) Review recent non-invasive brain stimulation approaches (rTMS and tDCS) for the treatment of psychiatric symptoms and question their relevance in late-life psychiatric disorders. 2) Practice with available brain stimulation devices approved as medical device by health authorities. 3) Discuss the strengths, weaknesses and gaps of the various approaches in each indication