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Deep brain stimulation (DBS) is a neurosurgery neurosurgical technique in which electrodes are implanted into patient's brain. Although, patients have to undergo an invasive surgery, it is growing field of neurosurgery. <ref>GOSSET, Nathalie, DIETZ, Nicholas. IEEE Pulse [online]. Unlocking Pain: Deep brain stimulation might be the key to easing depression and chronic pain. 2015, Mar 15. Available online at: http://pulse.embs.org/march-2015/unlocking-pain/ (Retrieved 13th April, 2017).</ref> DBS proved to be cost-effective in a treatment of certain severe neurological diseases as Parkinson's disease, essential tremor, dystonia or epilepsy. The treatment of other neurological and psychiatric diseases as OCD, depression or chronic pain, is examined intensively. DBS is not a cure. None of the diseases to which is used are curable at the moment. It could however, eliminate symptoms of the diseases, which negatively affected the lives of the patients. DBS is used in medical devices, which are on prescription, the use for cognitive enhancement is highly limited. However, certain cases of possible cognitive enhancement were also reported. <ref>DANCE, Amber. Deep-Brain Stimulation: An Electrode for All Occasions?. Alzforum [online]. 2010, May 25. Available online at: http://www.alzforum.org/news/research-news/deep-brain-stimulation-electrode-all-occasions (Retrieved 13th April, 2017).</ref>