FM11.1-6 | Forensic Psychiatry — Practice Quiz

Correct. Third-person auditory hallucinations (voices discussing the patient in third person, commentary hallucinations) are Schneiderian First-Rank Symptoms (FRS). Combined with persecutory delusions (satellite government tracking = persecution), this presentation is consistent with schizophrenia spectrum disorder (ICD-11: schizophrenia). FRS are not pathognomonic for schizophrenia but are strongly associated with it.

Schneiderian First-Rank Symptoms: (1) auditory hallucinations (third-person, commentary, thought echo); (2) thought insertion/withdrawal/broadcasting; (3) made feelings/impulses/acts; (4) somatic passivity; (5) delusional perception. Delusions: persecutory (most common in schizophrenia), grandiose (mania), nihilistic (psychotic depression), jealous (Othello syndrome), erotomania (de Clérambault).

Nihilistic delusions (believing oneself dead/non-existent) characterise psychotic depression. Bipolar I can have psychotic features but command hallucinations are not its hallmark. PTSD features re-experiencing, avoidance, and hyperarousal — not typically third-person hallucinations.

Correct. DSM-5 and ICD-11 both require that PTSD symptoms persist for more than 1 month after the traumatic event. If symptoms resolve within 1 month of the stressor, the diagnosis is Acute Stress Disorder (DSM-5) or acute stress reaction (ICD-11). This patient's 3-month duration exceeds the 1-month threshold, confirming the PTSD diagnosis.

PTSD diagnostic criteria (DSM-5): Criterion A (traumatic event), B (intrusion), C (avoidance), D (negative cognitions/mood), E (arousal), F (>1 month duration), G (significant impairment), H (not substance/medical). Forensic relevance: PTSD can establish psychological injury in medicolegal claims; assess causation, pre-existing vulnerability.

2 weeks is insufficient. 3 months is when symptoms would be considered 'chronic PTSD' in older classification. 6 months was the ICD-10 criterion for establishing delayed-onset PTSD — not the minimum symptom duration.

Correct. The Indian Penal Code was replaced by the Bharatiya Nyaya Sanhita (BNS) 2023. The insanity defence — previously under IPC Section 84 — is now codified under BNS Section 22. The substance is unchanged: a person is not criminally responsible for an act committed when, by reason of unsoundness of mind, they did not know the nature of the act or that it was wrong.

BNS Section 22 (insanity defence): two prongs — (1) did not know the nature of the act, OR (2) did not know the act was wrong. Burden of proof: on the accused (balance of probabilities). Disease of mind: legal concept, not strictly psychiatric. Mental illness at time of offence is what matters, not at time of trial.

IPC Section 84 has been replaced by BNS Section 22. BNS Section 84 covers a different provision. IPC is no longer in force for offences committed after July 2024.

Correct. McNaughten Rules (1843, UK House of Lords) have two prongs: (1) the accused did not know the nature and quality of the act, OR (2) the accused did not know that the act was wrong. Both prongs require a 'defect of reason from disease of the mind'. 'Irresistible impulse' is NOT part of the McNaughten test — this is a common exam trap.

McNaughten Rules: two-prong cognitive test — 'nature' prong (didn't know what they were doing) + 'wrongness' prong (didn't know it was wrong). Irresistible impulse = NOT a defence in India. Forensic psychiatrist's role: assess whether the disease of mind existed AND caused the specific cognitive deficit at the time of the act.

ICD-11 diagnosis alone does not satisfy McNaughten — the disease must have caused a specific cognitive defect. Irresistible impulse is not a McNaughten defence (though it is in some US jurisdictions — not India). Involuntary intoxication is handled under separate provisions.

Correct. A hallmark of malingering is inconsistency — particularly the disappearance or marked improvement of symptoms when the patient believes they are not being observed (e.g., seen through a one-way mirror or in naturalistic settings). Genuine psychotic symptoms are persistent and not modulated by observation. Consistent symptom reporting, prior treatment history, and MSE findings suggest genuine illness.

Malingering detection: (1) inconsistency when unobserved; (2) endorsing rare/absurd symptoms; (3) approximate answers (Vorbeireden/Ganser syndrome — not malingering but differential); (4) SIMS/M-FAST structured instruments; (5) collateral history. Important: Ganser syndrome = genuine dissociative condition with approximate answers, not malingering.

Consistent hallucinations across assessments support genuine psychosis. Pre-existing treatment history supports genuine illness. Disorganised speech on MSE can be genuine. The key marker for malingering is symptom inconsistency when unobserved.

Correct. Delirium Tremens and alcohol withdrawal carry a risk of Wernicke's encephalopathy (thiamine deficiency) in malnourished alcoholics. Administering glucose before thiamine can precipitate acute Wernicke's encephalopathy by consuming the limited thiamine reserve. IV thiamine MUST be given BEFORE glucose. This is a well-established clinical rule in DT management.

DT timeline: tremulousness 6-8h; hallucinations 12-24h; withdrawal seizures 24-48h; full DT 48-72h after last drink. Treatment: high-dose IV thiamine FIRST, then glucose; benzodiazepines (diazepam/lorazepam) for seizures and agitation; monitor electrolytes (hypomagnesaemia common); ICU for severe cases. Wernicke triad: confusion + ophthalmoplegia + ataxia.

CT brain is not the urgent first step. Benzodiazepines are important for withdrawal management but thiamine before glucose is the priority safety step. Oral thiamine is inadequate in acute DT — IV route is required.

Correct. MHA 2017 uses the term 'supported admission' (not 'involuntary admission') for compulsory admission. Under Section 89-90, supported admission requires: (1) application by a nominated representative or relative, (2) two mental health professionals' assessment confirming danger, (3) independent review by a Mental Health Review Board (MHRB) within 48-72 hours to ensure rights are protected.

MHA 2017 key provisions: right to mental healthcare; supported admission (not 'involuntary'); MHRB for independent review; advance directives for mental illness; nominated representative; prohibition of electroconvulsive therapy without consent; decriminalisation of suicide attempt; replaces MHA 1987.

30 days without review is not permitted under MHA 2017 — independent review is required within 48-72 hours. 'Criminal detention' under MHA applies to accused persons under court order (BNSS Section 366) — a different provision. MHA 2017 recognises that not all admissions require consent.

Correct. Section 115 of MHA 2017 provides that any person who attempts suicide shall be presumed to be suffering from severe stress and shall not be tried or punished under IPC Section 309 (now BNS Section 226). The government is mandated to provide care and rehabilitation. IPC Section 309 was not formally repealed but is effectively nullified by MHA 2017's presumption.

MHA 2017 Section 115: suicide attempt = presumed severe stress; no prosecution under BNS 226; government must provide care/rehabilitation. Forensic relevance: medico-legal examination of survivors should focus on care, not prosecution. Risk assessment and mental health referral are the mandated responses.

IPC/BNS Section 309/226 was not formally repealed — it still exists but MHA 2017 Section 115 prevents prosecution. Police preventive detention is inappropriate. The mechanism is a mandatory presumption of severe stress, not formal amendment of the penal code.

Correct. Fitness to plead (fitness to stand trial) is about the accused's CURRENT mental state, not at the time of the offence. The Pritchard criteria (UK basis, adopted in India) assess: (1) understands the nature of the charge, (2) can distinguish plea options (guilty/not guilty), (3) can follow court proceedings, (4) can instruct their lawyer. It is a present-state assessment.

Fitness to plead vs insanity defence: Fitness = current capacity to participate in trial (Pritchard criteria). Insanity = mental state at time of act (McNaughten/BNS 22). Forensic assessment: examine current MSE, history, capacity to instruct, understand charges. If unfit: proceedings stayed; treatment ordered; reassessed when fit.

Mental state at the time of offence is for the insanity defence (McNaughten/BNS Section 22). Risk of reoffending is for disposal decisions post-verdict. Fitness to plead is strictly a current functional capacity assessment.

Correct. Delusional mood (Wahnstimmung) describes a state where the patient senses something strange and threatening is happening but has not yet crystallised a specific delusion. Delusional perception (a Schneiderian FRS) is when a normal perception is given a private, self-referential significance. The unsystematised, variable, perplexed presentation here is characteristic.

Delusion classification: (a) by form — primary (autochthonous, delusional perception, delusional memory) vs secondary (arising from mood/hallucination); (b) by content — persecutory, grandiose, nihilistic, erotic, jealous, hypochondriacal; (c) by structure — systematised vs fragmented.

A primary (autochthonous) delusion arises 'out of the blue' fully formed without preceding mood or perplexity. Secondary delusions arise from mood states (depressive or manic). An overvalued idea is intense but not fully delusional. The described presentation fits delusional mood/delusional perception.

Correct. Ganser syndrome is a dissociative disorder (NOT malingering) characterised by: approximate answers (Vorbeireden — e.g., 2+2=5), twilight state (clouded consciousness), somatic conversion symptoms, and pseudohallucinations. It is important in forensic settings because it can be mistaken for malingering. The approximate answers are genuinely dissociative, not conscious deception.

Ganser syndrome: Described by Sigbert Ganser (1898) in prisoners. Features: Vorbeireden (approximate answers — answers are close but wrong), twilight/clouded state, conversion symptoms (e.g., pseudoparalysis), pseudohallucinations. Classified under dissociative disorders (ICD-11 F44.80). Resolves with stress removal. Key distinction: not deliberate, not malingering.

Ganser syndrome is a dissociative disorder, not deliberate feigning (malingering). Factitious disorder involves feigning for sick-role benefits without external incentives. Dissociative amnesia is a separate entity. Ganser's hallmark is approximate answers within a dissociative context.

Correct. Severe autonomic instability with persistent disorientation indicates florid DT requiring ICU management. The CIWA-Ar (Clinical Institute Withdrawal Assessment for Alcohol) scale >15 indicates severe withdrawal. Autonomic instability (tachycardia, hypertension, hyperthermia) combined with delirium predicts mortality risk (untreated DT mortality ~15-20%; treated <1%).

DT severity (CIWA-Ar): mild (<8), moderate (8-15), severe (>15). Severe = ICU. Features of full DT: disorientation, vivid hallucinations (visual > auditory > tactile), autonomic storm, fever, seizures. Mortality: untreated ~15-20%; treated with benzos <1%. Risk factors for severe DT: prior severe withdrawal, long drinking history, concurrent illness.

Mild tremor and diaphoresis at 8 hours is early/mild withdrawal — manageable on ward. A single seizure without recurrence and no delirium is moderate severity. Visual illusions without autonomic disturbance indicate moderate withdrawal not requiring ICU.