EN
This article draws attention to the ailment known as Body Integrity Identity Disorder (BIID). People affected by it are convinced that a particular limb does not correspond to their subjective body image. This discrepancy causing large discomfort is often eliminated through amputations. After selecting predominantly exchanged reasons for amputation of healthy limbs “on demand”, the specificity of the BIID is presented with particular emphasis on current research in broadly understood neuroscience. Research suggests congenital dysfunction of the right superior parietal lobule. The last part of the article lists the examples of the legal, ethical and social problems that may be associated with BIID, while stressing the role of neuroscience in attempts to solve these dilemmas.