Psychiatric Assessment and Diagnosis Practice Questions

Q: All of the following are examples of cortical dementia except?

Multiple sclerosis. ### Explanation Dementia is broadly classified into **Cortical** and **Subcortical** types based on the primary site of pathology and the clinical presentation. **1. Why Multiple Sclerosis (MS) is the correct answer:** Multiple Sclerosis is primarily a **Subcortical dementia**. It is a demyelinating disease affecting the white matter of the brain and spinal cord. Subcortical dementias are characterized by "executive dysfunction" rather than "cortical" symptoms like aphasia. Clinical features include psychomotor slowing, apathy, forgetfulness, and impaired ability to manipulate acquired knowledge. **2. Analysis of Incorrect Options (Cortical Dementias):** Cortical dementias primarily affect the cerebral cortex (gray matter), leading to early symptoms of **Aphasia** (language deficit), **Agnosia** (failure to recognize objects), **Apraxia** (inability to perform motor tasks), and **Amnesia**. * **Alzheimer’s Disease:** The most common cortical dementia, characterized by amyloid plaques and neurofibrillary tangles. * **Pick’s Disease (Frontotemporal Dementia):** A cortical dementia involving circumscribed atrophy of the frontal and temporal lobes. * **Creutzfeldt-Jakob Disease (CJD):** A rapidly progressive prion disease that causes widespread cortical spongiform changes. **3. NEET-PG High-Yield Pearls:** * **Cortical vs. Subcortical:** If the question mentions **Aphasia**, think Cortical. If it mentions **Movement Disorders** (like tremors or rigidity) or **Psychomotor slowing**, think Subcortical. * **Other Subcortical Dementias:** Parkinson’s disease, Huntington’s disease, Progressive Supranuclear Palsy (PSP), and HIV-associated dementia. * **Reversible Dementias:** Always rule out Vitamin B12 deficiency, Hypothyroidism, and Normal Pressure Hydrocephalus (NPH).

Q: Which of the following statements regarding delirium is true?

Decreased attention. **Explanation:** Delirium is an acute neuropsychiatric syndrome characterized by a transient, reversible decline in cognitive function. The hallmark of delirium is a **disturbance in attention** (reduced ability to direct, focus, sustain, and shift attention) and **awareness** (reduced orientation to the environment). **Why Option D is Correct:** According to DSM-5 criteria, the core feature of delirium is a disturbance in attention and awareness. Patients are easily distracted, unable to follow commands, and show a "clouding of consciousness." This is the most sensitive clinical sign for diagnosing delirium. **Why Other Options are Incorrect:** * **A. Insidious onset:** Delirium is characterized by an **acute onset** (hours to days) and a **fluctuating course** throughout the day (often worsening at night, known as "sundowning"). Insidious onset is typical of Dementia. * **B. Clear consciousness:** In delirium, consciousness is **impaired or clouded**. A "clear sensorium" in the presence of hallucinations or delusions is more suggestive of Schizophrenia or other primary psychotic disorders. * **C. Irreversible:** Delirium is typically **reversible** once the underlying medical cause (e.g., infection, electrolyte imbalance, drug toxicity) is identified and treated. **High-Yield Clinical Pearls for NEET-PG:** * **EEG Findings:** Characteristically shows **generalized slowing** (theta and delta waves). *Exception:* Alcohol/Sedative withdrawal delirium (Delirium Tremens) shows low-voltage fast activity. * **Visual Hallucinations:** These are the most common type of hallucinations in delirium (unlike Schizophrenia, where auditory are more common). * **Drug of Choice:** **Haloperidol** (low-dose) is the preferred antipsychotic for agitation. Avoid benzodiazepines unless the delirium is due to alcohol/sedative withdrawal.

Q: Which of the following is an example of a mature defense mechanism?

Suppression. **Explanation:** Defense mechanisms are unconscious psychological strategies used to cope with anxiety and internal conflict. They are categorized into four levels based on maturity (Narcissistic, Immature, Neurotic, and Mature). **Correct Answer: D. Suppression** Suppression is a **Mature** defense mechanism. It involves the **conscious** decision to delay paying attention to an emotion or need in order to cope with the present reality. For example, a student decides not to think about their exam results while attending a family function. Unlike other mechanisms, mature defenses are adaptive and help maintain psychological health. **Incorrect Options:** * **A. Intellectualization (Neurotic):** This involves using excessive abstract thinking or complex explanations to avoid experiencing disturbing feelings. It is a level 3 (neurotic) defense. * **B. Dissociation (Immature/Neurotic):** This involves a temporary, drastic modification of one’s character or sense of identity to avoid emotional distress (e.g., "out-of-body" experiences). It is generally classified as an immature or neurotic defense. * **C. Displacement (Neurotic):** This involves shifting an impulse or feeling from a threatening object to a safer, less threatening target (e.g., a doctor yelling at a nurse after being scolded by the Chief of Medicine). **High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic for Mature Defenses (SASH):** **S**ublimation (channeling impulses into socially acceptable actions), **A**ltruism (service to others), **S**uppression (conscious postponement), and **H**umor. * **Suppression vs. Repression:** This is a common examiner favorite. **Suppression is conscious**, while **Repression is unconscious** (forgetting a trauma involuntarily). * **Reaction Formation:** Transforming an unacceptable impulse into its exact opposite (e.g., being overly kind to someone you dislike). This is a Neurotic defense.

Q: All are features of delirium except?

Loss of memory. **Explanation:** Delirium is an acute, transient, and reversible organic mental syndrome characterized by a **disturbance of consciousness** and a change in cognition. **Why "Loss of Memory" is the correct answer:** While patients with delirium may appear forgetful due to poor attention, **Loss of Memory (Amnesia)** is not a core diagnostic feature of delirium. Memory loss is the hallmark of **Dementia** (a chronic, progressive neurocognitive disorder). In delirium, the primary deficit is **Attention and Awareness**, whereas in dementia, the primary deficit is memory. **Analysis of Incorrect Options:** * **Confusion:** This is a hallmark of delirium. The patient exhibits a "clouding of consciousness," where they cannot think with their customary speed, clarity, and coherence. * **Disorientation:** Delirious patients typically lose their sense of time and place. Disorientation to time is usually the first to appear. * **Hyperactivity:** Delirium is categorized into three motor subtypes: **Hyperactive** (agitation, psychomotor overactivity), **Hypoactive** (lethargy, stupor), and **Mixed**. Hyperactivity is a common clinical presentation, especially in alcohol withdrawal (Delirium Tremens). **NEET-PG High-Yield Pearls:** 1. **Key Diagnostic Feature:** Fluctuating levels of consciousness (waxing and waning) and impaired attention. 2. **EEG Findings:** Characteristically shows **generalized slowing** of background activity (except in Delirium Tremens, where EEG shows fast activity). 3. **Visual Hallucinations:** These are the most common type of hallucinations in delirium (often Lilliputian/microscopic). 4. **Sleep-Wake Cycle:** Reversal of the sleep-wake cycle (daytime somnolence and nighttime agitation/sundowning) is very common.

Q: A patient with a perceptual disorder is able to see an object without any external stimulus. What is this phenomenon known as?

Hallucination. ### Explanation **Correct Answer: B. Hallucination** A **hallucination** is defined as a false sensory perception in the absence of an external stimulus. It occurs in the external objective space and has the same qualities as a real perception (vividness and a sense of reality). Since the patient in the question sees an object without any actual stimulus present, it fits the classic definition of a visual hallucination. **Why the other options are incorrect:** * **A. Delusion:** This is a disorder of **thought content**, not perception. It is defined as a fixed, false belief that is out of keeping with the patient’s social, cultural, and educational background and is held with absolute conviction despite evidence to the contrary. * **C. Illusion:** This is a **misinterpretation** of a real external stimulus (e.g., mistaking a rope for a snake in the dark). Unlike hallucinations, an external stimulus must be present. * **D. Pseudohallucination:** These are perceptions that occur in the **inner subjective space** (the "mind's eye") rather than the external world. The patient often recognizes that the experience is not real. **NEET-PG High-Yield Clinical Pearls:** * **Hypnagogic vs. Hypnopompic:** Hallucinations occurring while falling asleep (Hypna**go**gic = **Go**ing to sleep) vs. waking up (Hypno**pom**pic = **Po**pping out of bed). * **Schizophrenia:** Most common type is **Auditory** (specifically third-person "running commentary"). * **Organic Brain Syndrome/Delirium:** **Visual** hallucinations are more common in organic conditions (e.g., alcohol withdrawal, head injury) than in primary psychiatric disorders. * **Formication:** A tactile hallucination feeling like insects crawling under the skin, commonly associated with cocaine use or alcohol withdrawal.

Q: What is the most common cause of organic amnestic syndrome?

Vitamin deficiency. **Explanation:** The correct answer is **Vitamin deficiency**, specifically **Thiamine (Vitamin B1) deficiency**. **1. Why Vitamin Deficiency is Correct:** Organic amnestic syndrome is characterized by a selective impairment of memory (both anterograde and retrograde) in the absence of generalized cognitive decline (dementia) or clouding of consciousness (delirium). The most common clinical manifestation is **Wernicke-Korsakoff Syndrome**, caused by chronic thiamine deficiency, typically secondary to alcohol use disorder. Thiamine is a vital cofactor for glucose metabolism in the brain; its deficiency leads to bilateral lesions in the **mammillary bodies** and the **dorsomedial nucleus of the thalamus**, which are critical nodes in the memory circuit (Papez circuit). **2. Why Other Options are Incorrect:** * **Alzheimer’s Disease:** While memory loss is a hallmark, it is a **neurodegenerative dementia**. It involves global cognitive decline (aphasia, apraxia, agnosia) rather than a "pure" or "isolated" amnestic syndrome. * **Concussion:** Head trauma can cause transient amnesia (post-traumatic amnesia), but it is usually self-limiting and less common as a chronic cause compared to nutritional deficiencies in clinical practice. * **Hypoxia:** While severe hypoxia (e.g., cardiac arrest) can cause permanent damage to the hippocampus leading to amnesia, it is a less frequent cause than the chronic nutritional deficits seen in the population. **Clinical Pearls for NEET-PG:** * **Korsakoff’s Psychosis:** Characterized by the triad of **Amnesia, Confabulation** (filling memory gaps with imaginary stories), and **Lack of Insight**. * **Wernicke’s Encephalopathy:** The acute precursor; triad includes **Ataxia, Ophthalmoplegia (nystagmus), and Confusion**. * **Key Anatomy:** The **Mammillary bodies** are the most high-yield anatomical site associated with organic amnesia in exams.

Q: Who coined the term Munchausen's syndrome?

Richard Asher. **Explanation:** The term **Munchausen's syndrome** was coined by **Richard Asher** in **1951**. He used this name to describe patients who chronically fabricate or self-induce symptoms of illness and wander from hospital to hospital seeking medical attention, often undergoing unnecessary surgeries. The syndrome is named after **Baron von Munchausen**, an 18th-century German nobleman famous for telling exaggerated and fictitious tales of his travels. **Analysis of Options:** * **Richard Asher (Correct):** An English endocrinologist and hematologist who first described the clinical pattern of "hospital hoppers" and linked it to the legendary Baron. * **Baron von Munchausen:** He is the historical figure who inspired the name due to his reputation for tall tales, but he did not coin the medical term. * **Jean-Marie Charcot:** Known as the "founder of modern neurology," he is famous for his work on hypnosis and hysteria (conversion disorder), but not factitious disorders. * **Emil Kraepelin:** A central figure in modern psychiatry known for distinguishing between "Dementia Praecox" (Schizophrenia) and manic-depressive psychosis. **High-Yield Clinical Pearls for NEET-PG:** * **Classification:** In DSM-5, Munchausen’s syndrome is classified as **Factitious Disorder Imposed on Self**. * **Munchausen Syndrome by Proxy:** Now termed **Factitious Disorder Imposed on Another**, where a caregiver (usually a mother) falsifies illness in a child. * **Primary Gain:** The motivation is to assume the **"sick role"** (internal psychological need), not for external incentives like money or avoiding work (which is **Malingering**). * **Common Signs:** "Gridiron abdomen" (multiple surgical scars), pseudologia fantastica (pathological lying), and extensive medical knowledge.

Question 1

All of the following are examples of cortical dementia except?

Accepted Answer

Multiple sclerosis

Answer

Alzheimer's disease

Answer

Creutzfeldt Jacob disease

Answer

Pick's disease

Question 2

Ganser syndrome is frequently seen in:

Accepted Answer

Prisoners

Answer

Doctors

Answer

Rape victims

Answer

Lawyers

Question 3

Which of the following statements regarding delirium is true?

Accepted Answer

Decreased attention

Answer

Insidious onset

Answer

Clear consciousness

Answer

Irreversible

Question 4

A 28-year-old male presents with vague pains and multiple surgical scars. He is persistently inquisitive about his diagnosis and requests various diagnostic procedures and biopsies. He reports a history of gallstone and appendicitis pain, but this history is inconsistent and appears manipulative, with no supporting records. What is the probable diagnosis?

Accepted Answer

Factitious disorder

Answer

Hypochondriasis

Answer

Somatization disorder

Answer

Conversion disorder

Question 5

Which of the following is an example of a mature defense mechanism?

Accepted Answer

Suppression

Answer

Intellectualization

Answer

Dissociation

Answer

Displacement

Question 6

All are features of delirium except?

Accepted Answer

Loss of memory

Answer

Confusion

Answer

Disorientation

Answer

Hyperactivity

Question 7

A 20-year-old female presented with complaints of nausea, vomiting, and pain in the legs. Her physical examination and lab investigations are normal. Despite repeated assurance by her doctor, she persistently requests investigations and treatment. What would be the most probable diagnosis?

Accepted Answer

Somatoform pain disorder

Answer

Generalized anxiety disorder

Answer

Conversion disorder

Answer

Somatization disorder

Question 8

A patient with a perceptual disorder is able to see an object without any external stimulus. What is this phenomenon known as?

Accepted Answer

Hallucination

Answer

Delusion

Answer

Illusion

Answer

Pseudohallucination

Question 9

What is the most common cause of organic amnestic syndrome?

Accepted Answer

Vitamin deficiency

Answer

Alzheimer's disease

Answer

Concussion

Answer

Hypoxia

Question 10

Who coined the term Munchausen's syndrome?

Accepted Answer

Richard Asher

Answer

Jean-Marie Charcot

Answer

Baron von Munchausen

Answer

Emil Kraepelin

Psychiatric Assessment and Diagnosis — MCQs

Psychiatric Assessment and Diagnosis — MCQs

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