The Supreme Court held that forcing a person to undergo polygraph, brain mapping, and narco-analysis tests is violative of:

In the famous Selvi v. State of Karnataka (2010) case, a three-judge bench of the Supreme Court held that involuntary administration of narco-analysis, polygraph test, or brain mapping violates an individual's right to privacy under Article 21 and the right against self-incrimination under Article 20(3) of the Constitution.