Where neurosciences, developing unremittingly over time, interweave with law and, in particular, with end-of-life decisions matter, severe and sensitive implications become evident. Lawyers and lawmakers cannot remain unaffected by these implications. Accordingly, a complex entanglement between science/technique, law and politics must take place. Was this alliance considered in the case of the recent Italian law on “informed consent and living will” passed by the Italian Parliament at the end of 2017? Our paper aims to pinpoint how the Italian legislator, within the decision-making process which led to the mentioned law, combined the ethical and political dimension of this matter with the scientific and neuroscientific assumptions. Did the Parliament take properly advantage from experts? How did the experts’ opinions influence the definitive version of the law approved?