No effect of anodal F3/cathodal Cpz tDCS in a patient with severe treatment-refractory coenaesthetic hallucinations
Katarzyna Sylwia Walczak1, Adam Wysokiński2

This article presents a case report of a 57-year-old patient with chronic (>20 years) schizophrenia and severe treatment-refractory coenaesthetic hallucinations located within the genital area. Due to the lack of therapeutic alternatives, a course of transcranial direct current stimulation targeting the somatosensory cortex that represents the genital area was performed. The severity of symptoms was assessed using the Clinical Global Impression (CGI, Severity and Improvement), Positive and Negative Syndrome Scale (PANSS) and three visual-analogue scales, separately for the three distinctive features of “general discomfort”, “ripping out”, and “pain”. After completing the three-week transcranial direct current stimulation course, there were no changes between the baseline and final clinical scores.