<prompt> Which of the following is a first rank symptom in Schizophrenia?DelusionsThought insertionPerceptional hallucinationsWord salad  <response>: Ans: B Thought insertion Ref: Synopsis of psychiatry, Kaplan Sadock, 10th editionExplanationSchneider described a set of symptoms which were characteristic but not pathognomonic of schizophrenia.They are grouped as follows- Auditory hallucinations of following characteristicsdeg Voices heard arguingdiscussing or giving instructionseommanding 2nd persondeg Voices heard commenting on ones actions running commentary, usually describing the patient in the 3rd persondeg Thought echo thoughts being heard aloud in ones minddeg Thought insertion thoughts are ascribed to other people who are intruding into the patients minddeg Thought withdrawal feeling that ones thoughts are being sucked by means like chipsdeg Thought broadcasting also called thought diffusion- where ones thoughts are known to others by means of internetmobile etc- Somatic passivity experiences delusions of control of being controlled i.e. heshe is nothing but a doll hisher speechactivities are controlled by external agentsalien forces- Delusional perception Sudden delusional idea after a normal perception e.g., suddenly believing that one is the king after seeing a horsef 