FM11.1-6 | Forensic Psychiatry — Graded Quiz

Correct. Knowing the 'nature of the act' includes knowing the physical character of what one is doing. If the accused genuinely believed (due to psychotic delusion) that he was killing a demon, not a human being, he did not know the nature of the act (killing a person). This satisfies the first prong of BNS Section 22 (McNaughten). The second prong (wrongness) might also apply but the nature prong is the stronger and more direct basis here.

BNS Section 22 application: (1) Nature prong: accused didn't know what they were physically doing (e.g., thought they were cutting a tree when strangling victim). (2) Wrongness prong: knew the physical act but believed it was commanded by God/justified. Both require 'disease of the mind'. Burden of proof on accused (balance of probabilities).

Both prongs are not typically argued together — the nature prong is more directly satisfied here. The wrongness prong would apply if he knew he was killing a human but believed it was divinely commanded and therefore not wrong. The nature prong is the primary basis when the accused misidentifies the target due to delusion.

Correct. Selvi v State of Karnataka (2010) — the Supreme Court held that polygraph, narcoanalysis (truth serum), and brain mapping (P300/BEAP) violate Article 20(3) of the Constitution (right against self-incrimination) and Article 21 (right to privacy and bodily integrity). The results are NOT admissible as evidence even with the accused's consent, as consent under police custody cannot be truly voluntary.

Selvi v Karnataka 2010: polygraph + narcoanalysis + brain mapping = NOT admissible. Constitutional basis: Art 20(3) (self-incrimination) + Art 21 (mental privacy). However: leads discovered from narcoanalysis statements MAY be used as circumstantial evidence. DNA profiling, blood samples, breath analysis = permissible (don't violate mental privacy).

Selvi 2010 makes these techniques inadmissible regardless of consent. BEAP/brain mapping is also inadmissible — the ruling covers all three techniques equally. Corroboration does not rescue otherwise inadmissible evidence obtained through these methods.

Correct. Under MHA 2017, any adult (≥18 years) who has the capacity to make decisions can execute an Advance Directive specifying their preferred treatment and/or treatment to be refused during future episodes of mental illness. It must be signed, witnessed, countersigned by a medical practitioner, and registered with the District Court to be valid.

MHA 2017 Advance Directive: (1) adult with capacity, (2) specifies treatment preferences/refusals, (3) witnessed by two persons, (4) countersigned by mental health professional, (5) registered with District Court. Can be revoked at any time when the person has capacity. Protects both patient autonomy and treating clinicians acting in good faith.

A person under current supported admission lacks requisite capacity by definition. Nominated representatives cannot make directives on behalf of others — a directive is a personal expression of autonomous choice. Family members cannot substitute their decision for the patient's directive.

Correct. The clinical triad of confusion + ataxia + nystagmus = Wernicke's encephalopathy until proven otherwise in a chronic alcoholic. High-dose IV thiamine (500 mg or 200-500 mg three times daily by IV infusion per UK guidelines) must be given BEFORE any glucose load. Blood glucose is 90 mg/dL — not hypoglycaemic — so dextrose bolus is not indicated. Haloperidol does not treat the underlying cause.

Wernicke's encephalopathy vs DT: DT = autonomic storm + delirium (48-72h post last drink); Wernicke = confusion + ophthalmoplegia/nystagmus + ataxia (thiamine deficiency). Both can co-occur. Korsakoff's psychosis = late sequela of untreated Wernicke's (anterograde amnesia + confabulation). Treatment: high-dose IV thiamine (500mg TDS × 3 days minimum).

Blood glucose is normal (90 mg/dL) — IV dextrose is not indicated. Haloperidol treats agitation, not Wernicke's. CT brain should not delay thiamine administration. The diagnosis is clinical and thiamine is immediately lifesaving.

Correct. MHA 2017 requires the MHRB to review supported (involuntary) admission within 48-72 hours to ensure: the admission criteria are met, the person's rights are protected, and the least restrictive option is being used. The MHRB must also review any extension of supported admission beyond 30 days.

MHRB composition: District Judge (chairperson) + medical officer or psychiatrist + mental health professional from allied field. Functions: review supported admissions within 48-72h; hear appeals; review admissions beyond 30 days; ensure rights compliance. District MHRB for each district — established under state governments.

7 days and 14 days are not the mandated review timelines under MHA 2017. 30 days is for extension review. The initial review is 48-72 hours to provide rapid independent oversight.

Correct. In medicolegal PTSD assessments, the core forensic question is causation: did the index event cause or materially contribute to the psychiatric injury? The 'thin skull' rule means pre-existing vulnerability does not reduce the defendant's liability — they 'take the victim as they find them'. The psychiatrist must also address apportionment (what proportion attributable to the accident vs other stressors).

Forensic PTSD report elements: (1) diagnosis per criteria, (2) causation (accident → PTSD), (3) pre-existing vulnerability (thin skull rule), (4) apportionment if multiple stressors, (5) current severity and functional impairment, (6) prognosis with treatment. Never conflate compensation claim with malingering — structured assessment (SIMS, PCL-5) should be used.

Delayed onset (>6 months) PTSD is recognised in both DSM-5 and ICD-11 — delay does not invalidate the diagnosis. Both DSM-5 and ICD-11 criteria are accepted in Indian courts. A compensation claim does not automatically imply malingering — this assumption is biased and clinically indefensible.

Correct. Indian criminal law (IPC/BNS) does NOT have a formal doctrine of diminished responsibility as a partial defence. Unlike the UK (Homicide Act 1957 / Coroners and Justice Act 2009), BNS Section 22 operates as a complete defence (full acquittal on grounds of insanity) or does not apply at all. Mental illness may be considered in sentencing as a mitigating factor, but it is not a partial defence reducing the charge.

Indian vs UK: UK has diminished responsibility (partial defence, murder→manslaughter). India has no equivalent — BNS 22 is complete or not applicable. Practical implication: a forensic psychiatrist in India cannot offer 'partial insanity' opinion; must opine on whether the full BNS 22 criteria are met or not. Mental illness at sentencing: judges can consider it under CrPC provisions for treatment/hospital order.

Diminished responsibility as a codified partial defence does not exist in Indian law. Substance intoxication has separate BNS provisions (voluntary intoxication is generally not a defence; involuntary may reduce culpability). Sentencing mitigation is different from a legal defence.

Correct. The ability to plan does not negate genuine psychosis. Delusional beliefs can be incorporated into goal-directed planning — the accused may have planned meticulously BECAUSE of the delusion (e.g., believed they needed to plan carefully to eliminate the demon). Forensic psychiatrists must educate courts that executive function (planning, organisation) and reality testing (delusions) are supported by different neural systems.

Common forensic misconceptions: (1) 'He planned it, so he knew it was wrong' — FALSE; planning ≠ reality testing. (2) 'He ran away, so he knew it was wrong' — flight behaviour in psychosis has multiple explanations. (3) 'He looks normal' — psychosis fluctuates. The forensic psychiatrist's role: educate court, apply McNaughten/BNS 22 criteria rigorously, separate planning capacity from delusional cognition.

Planning capacity does not disprove psychosis. Preserved executive function is entirely compatible with florid delusions. Culpability reduction percentages are not part of Indian criminal law framework.

Correct. Gedankenlautwerden (thoughts out loud) or thought echo is the experience of hearing one's own thoughts spoken aloud but with the quality of an internal voice that only the patient can hear. It is a Schneiderian First-Rank Symptom. Thought broadcasting is when the patient believes others CAN hear the thoughts. A true hallucination is perceived in external space with full perceptual quality.

Thought disorder types: (1) thought echo (Gedankenlautwerden) = hears own thoughts as internal voice; (2) thought broadcasting = believes others hear thoughts; (3) thought insertion = foreign thoughts inserted by outside agency; (4) thought withdrawal = thoughts removed. All four are Schneiderian FRS strongly suggestive of schizophrenia.

Thought broadcasting involves the belief that others hear the thoughts — this patient explicitly says others cannot hear them. True auditory hallucinations are perceived in external space (the 'outside'). A pseudohallucination lacks the 'egodystonic' quality of thought echo and is perceived purely in the inner mind's eye.

Correct. BNSS Section 366 (replacing CrPC Section 328) allows a magistrate, on report of a medical officer or MHP, to order an accused person who appears to be of unsound mind to be observed/treated at a mental health establishment. The court retains jurisdiction; the accused is not discharged. This is the legally correct pathway.

BNSS provisions for mentally ill accused: Section 366 (accused found of unsound mind — court-directed observation/treatment); Section 367 (procedure for disposal if permanently unfit — release or continued care); Section 369 (acquitted on grounds of unsoundness — safe custody order). MHA 2017 and BNSS must be read together.

Compulsory treatment without court order in prison is not legally sanctioned. Discharge on medical grounds removes court jurisdiction inappropriately. Filing an FIR for feigning is inappropriate as a first step and bypasses the proper medical assessment pathway.