Psychiatric Assessment and Diagnosis — MCQs

Psychiatric Assessment and Diagnosis Indian Medical PG Practice Questions and MCQs

Question 181: All of the following are relatively normal in Korsakoff's psychosis except:

A. Implicit memory
B. Intelligence
C. Language
D. Learning (Correct Answer)

Explanation: **Explanation:** Korsakoff’s Psychosis (often part of the Wernicke-Korsakoff syndrome) is characterized by a profound **anterograde amnesia** caused by thiamine (Vitamin B1) deficiency, typically due to chronic alcohol abuse. **Why "Learning" is the correct answer:** The hallmark of Korsakoff’s syndrome is the inability to form new memories (anterograde amnesia). **Learning** is essentially the process of acquiring and encoding new information into long-term memory. Because the damage occurs in the diencephalon (mammillary bodies and dorsomedial nucleus of the thalamus), patients cannot "learn" or retain new facts or events, making this the most abnormal function among the choices. **Analysis of incorrect options:** * **A. Implicit memory:** This remains relatively **preserved**. Patients can often learn new motor skills or procedural tasks (e.g., mirror drawing) even if they have no conscious (explicit) memory of having practiced them. * **B. Intelligence:** General cognitive functions, reasoning, and IQ scores often remain within the **normal** range. The deficit is specific to memory rather than global intellectual decline (unlike Dementia). * **C. Language:** Basic linguistic abilities, vocabulary, and syntax are typically **spared**. Patients can converse normally, although they may use **confabulation** (filling memory gaps with fabricated stories) to hide their memory deficits. **High-Yield Clinical Pearls for NEET-PG:** * **Neuroanatomy:** Most common site of lesion is the **Mammillary bodies**. * **Clinical Tetrad:** Amnesia (Anterograde > Retrograde), Confabulation, Lack of insight, and Apathy. * **Confabulation:** A characteristic feature where the patient provides false information without the intent to deceive. * **Treatment:** High-dose parenteral **Thiamine**. Always give thiamine *before* glucose to avoid precipitating Wernicke’s encephalopathy.

Question 182: Which of the following is NOT an example of a form of thought disorder?

A. Obsessive compulsive neurosis
B. Delusion (Correct Answer)
C. Schizophrenia
D. Loosening of association

Explanation: To understand this question, one must distinguish between the **Form** (how one thinks) and the **Content** (what one thinks) of thought. ### **Explanation of the Correct Answer** **B. Delusion** is the correct answer because it is a disorder of **thought content**, not form. A delusion is defined as a fixed, false belief that is out of keeping with the patient’s social, cultural, and educational background. While the structure of the patient's speech may be logical (normal form), the underlying idea is pathological (abnormal content). ### **Analysis of Incorrect Options** * **D. Loosening of Association:** This is a classic example of a **Formal Thought Disorder (FTD)**. It occurs when the logical connection between successive thoughts is lost, resulting in fragmented speech. * **C. Schizophrenia:** This is a clinical syndrome where Formal Thought Disorders (like loosening of association, neologisms, and word salad) are hallmark diagnostic features. * **A. Obsessive Compulsive Neurosis:** While primarily characterized by obsessions (content), it is traditionally categorized under disorders of the **possession of thought**. However, in the context of this specific MCQ, it is often grouped with formal/process disturbances in older classifications compared to delusions, which are the "gold standard" for content disorders. ### **High-Yield Clinical Pearls for NEET-PG** * **Disorder of Stream:** Pressure of speech (Mania), Poverty of speech (Depression/Schizophrenia), Thought blocking. * **Disorder of Form (FTD):** Circumstantiality, Tangentiality, Loosening of associations (Knight's move thinking), Verbigeration. * **Disorder of Content:** Delusions, Phobias, Hypochondriacal preoccupations. * **Disorder of Possession:** Obsessions, Thought insertion, Thought withdrawal, Thought broadcasting (Schneiderian First Rank Symptoms). * **Neologism:** Coining new words; highly characteristic of Schizophrenia.

Question 183: The Wechsler test is used to assess which of the following?

A. Memory
B. Orientation
C. Speech
D. Intelligence (Correct Answer)

Explanation: **Explanation:** The **Wechsler Scales** are the gold standard instruments used globally for the assessment of **Intelligence (Option D)**. Developed by David Wechsler, these tests move away from the traditional "Mental Age" concept, instead using the **Deviation IQ**, which compares an individual's performance to the average performance of their age-matched peers. There are three primary versions tailored to different age groups: 1. **WPPSI:** Wechsler Preschool and Primary Scale of Intelligence (ages 2.5–7 years). 2. **WISC:** Wechsler Intelligence Scale for Children (ages 6–16 years). 3. **WAIS:** Wechsler Adult Intelligence Scale (ages 16–90 years). **Analysis of Incorrect Options:** * **Memory (Option A):** While the Wechsler scales include subtests for working memory (like Digit Span), memory is primarily assessed using the **Wechsler Memory Scale (WMS)** or the PGI Memory Scale, not the standard intelligence test. * **Orientation (Option B):** This is a component of the **Mini-Mental State Examination (MMSE)** or a bedside Mental Status Examination (MSE), used to screen for delirium or dementia. * **Speech (Option C):** Speech and language are evaluated through clinical observation or specific neuropsychological batteries (e.g., Boston Diagnostic Aphasia Examination) rather than IQ tests. **High-Yield Clinical Pearls for NEET-PG:** * **Mean IQ:** The mean score for Wechsler tests is **100** with a Standard Deviation (SD) of **15**. * **Intellectual Disability (ID):** Defined as an IQ score below **70** (2 SDs below the mean) along with deficits in adaptive functioning. * **Bhatia’s Battery:** A common Indian performance test for intelligence often asked in exams. * **Raven’s Progressive Matrices:** A popular non-verbal, culture-fair test of intelligence.

Question 184: Which of the following signs is not characteristic of conversion disorder?

A. Astasia-abasia
B. Cogwheel rigidity (Correct Answer)
C. Hemianesthesia of the body at the midline
D. Normal reflexes

Explanation: **Explanation:** Conversion Disorder (Functional Neurological Symptom Disorder) involves neurological symptoms (motor or sensory) that are inconsistent with established neurological or medical conditions. The diagnosis relies on finding "positive signs" of clinical incompatibility during physical examination. **Why Cogwheel Rigidity is the correct answer:** Cogwheel rigidity is a hallmark sign of **extrapyramidal dysfunction**, specifically seen in Parkinson’s disease. It is an objective physical finding resulting from a combination of lead-pipe rigidity and a tremor. It cannot be voluntarily simulated or produced by psychological distress, making it a "hard" neurological sign that rules out a conversion disorder. **Analysis of incorrect options:** * **Astasia-abasia:** This is a classic conversion symptom where the patient exhibits a bizarre, staggering gait, often swaying wildly without actually falling. The coordination of the limbs is normal when lying down, which is characteristic of conversion. * **Hemianesthesia at the midline:** In organic neurological lesions, sensory loss usually overlaps the midline due to the innervation pattern of cutaneous nerves. A sensory loss that stops abruptly and precisely at the midline is a classic non-anatomical finding suggestive of conversion. * **Normal reflexes:** Since conversion disorder does not involve damage to the upper or lower motor neurons, deep tendon reflexes (DTRs) remain normal, and the plantar response is flexor (negative Babinski). **High-Yield Clinical Pearls for NEET-PG:** * **Hoover’s Sign:** A positive sign for functional weakness where hip extension weakness resolves when the patient flexes the contralateral hip against resistance. * **La Belle Indifference:** A historical term describing a patient’s relative lack of concern regarding their severe disability (not pathognomonic but frequently associated). * **Primary Gain:** Internal conflict resolution (e.g., anxiety reduction). * **Secondary Gain:** External benefits (e.g., avoiding work or gaining attention).

Question 185: A 55-year-old male presented with complaints of apathy, disinhibition, compulsive behavior, loss of empathy, overeating, easy forgetfulness, and amnesia. There is also a family history of dementia. What is the most likely diagnosis?

A. Alzheimer's disease
B. Vascular dementia
C. Frontotemporal dementia (Correct Answer)
D. Lewy body dementia

Explanation: ### Explanation **Correct Answer: C. Frontotemporal dementia (FTD)** The clinical presentation of **Frontotemporal Dementia (behavioral variant)** is characterized by early and prominent changes in personality and social conduct. The key features in this patient—**apathy, disinhibition** (socially inappropriate behavior), **compulsive/ritualistic behaviors**, **loss of empathy**, and **hyperphagia** (overeating)—are classic markers of frontal lobe involvement. While memory impairment (amnesia) occurs, it is often secondary to executive dysfunction rather than the primary presenting symptom. The strong family history is also highly suggestive, as approximately 30-50% of FTD cases are hereditary (e.g., MAPT or Progranulin mutations). **Why Incorrect Options are Wrong:** * **A. Alzheimer’s Disease:** Typically presents with early, prominent **episodic memory loss** (anterograde amnesia) and disorientation. Behavioral changes and disinhibition usually occur in the later stages, not as the presenting feature. * **B. Vascular Dementia:** Characterized by a **"step-ladder" decline** and focal neurological deficits. It is associated with cardiovascular risk factors (hypertension, diabetes) and neuroimaging shows infarcts or white matter lesions. * **C. Lewy Body Dementia:** Characterized by the triad of **visual hallucinations**, **fluctuating cognition**, and **parkinsonism**. REM sleep behavior disorder is also a common early sign. **High-Yield Clinical Pearls for NEET-PG:** * **Pick’s Disease:** A subtype of FTD characterized by the presence of **Pick bodies** (silver-staining intracytoplasmic inclusions of tau protein). * **Imaging:** MRI in FTD shows characteristic **"Knife-edge" atrophy** of the frontal and temporal lobes. * **Age of Onset:** FTD is the most common cause of dementia in individuals **under the age of 65**. * **Management:** Unlike Alzheimer’s, SSRIs are often used to manage behavioral symptoms (compulsions/impulsivity), while AChE inhibitors (like Donepezil) may worsen symptoms in FTD.

Question 186: An IQ value between 90-109 is considered to belong to which category?

A. Imbecile
B. Moron
C. Normal (Correct Answer)
D. Near Genius

Explanation: ### Explanation The Intelligence Quotient (IQ) is a standardized measure of cognitive ability, calculated as (Mental Age / Chronological Age) × 100. According to the classification originally proposed by Terman and widely used in clinical psychiatry, an **IQ of 90–109 is classified as Average or Normal**. This range encompasses approximately 50% of the general population. #### Analysis of Options: * **C. Normal (Correct):** This range (90–109) represents the median of the bell curve in intelligence testing. * **A. Imbecile (Incorrect):** This is an obsolete term for **Moderate Intellectual Disability**, corresponding to an IQ range of **35–49**. * **B. Moron (Incorrect):** This is an obsolete term for **Mild Intellectual Disability**, corresponding to an IQ range of **50–70**. In modern ICD-11/DSM-5 terminology, these terms are replaced by "Intellectual Development Disorder." * **D. Near Genius (Incorrect):** This category (often termed "Very Superior") typically refers to an IQ score of **140 and above**. #### High-Yield Clinical Pearls for NEET-PG: * **Borderline Intelligence:** IQ range of **70–79**. * **Dull Normal:** IQ range of **80–89**. * **Intellectual Disability (ID) Cut-off:** An IQ below **70**, accompanied by deficits in adaptive functioning. * **Classification of ID (ICD-10):** * **Mild:** 50–69 (Educable) * **Moderate:** 35–49 (Trainable) * **Severe:** 20–34 (Dependent) * **Profound:** < 20 (Life support) * **The Flynn Effect:** The observed rise in average IQ scores over generations, necessitating periodic re-norming of tests.

Question 187: A homosexual person feels that they are imposed by a female body and has persistent discomfort with their sex. What is the diagnosis?

A. Gender dysphoria (Correct Answer)
B. Transvestism
C. Voyeurism
D. Paraphilias

Explanation: **Explanation:** The correct diagnosis is **Gender Dysphoria**. This condition is characterized by a strong, persistent cross-gender identification and a sense of inappropriateness regarding one’s assigned biological sex. The core feature described in the question—feeling "imposed" by a female body and experiencing "persistent discomfort"—aligns with the DSM-5 criteria for Gender Dysphoria (formerly known as Gender Identity Disorder). The individual’s sexual orientation (homosexuality) is independent of their gender identity. **Why other options are incorrect:** * **Transvestism (Transvestic Disorder):** This is a paraphilic disorder where an individual (typically a heterosexual male) achieves sexual arousal from cross-dressing. Unlike gender dysphoria, there is no inherent desire to be the opposite gender or discomfort with one's biological sex. * **Voyeurism:** This involves achieving sexual arousal by observing unsuspecting people who are naked, disrobing, or engaging in sexual activity ("Peeping Tom"). It is unrelated to gender identity. * **Paraphilias:** This is an umbrella term for intense, persistent sexual interests other than sexual interest in genital stimulation or preparatory fondling with phenotypically normal, physically mature, consenting human partners. While transvestism and voyeurism are types of paraphilias, they do not describe the specific identity conflict mentioned. **High-Yield Clinical Pearls for NEET-PG:** * **Gender Identity vs. Sexual Orientation:** Gender identity is *who you are* (internal sense of being male/female); sexual orientation is *who you are attracted to*. * **DSM-5 Update:** The term "Gender Identity Disorder" was replaced by "Gender Dysphoria" to focus on the **distress** caused by the mismatch, rather than pathologizing the identity itself. * **Ego-dystonic vs. Ego-syntonic:** Gender dysphoria is typically ego-dystonic (the person is distressed by the incongruence), whereas many paraphilias can be ego-syntonic unless they cause legal or social impairment.

Question 188: Type D personality is recently found to be at risk of developing which of the following?

A. Coronary artery disease (Correct Answer)
B. Depression
C. Schizophrenia
D. Mania

Explanation: **Explanation:** **Type D personality** (the "Distressed" personality) is characterized by two stable personality traits: **Negative Affectivity** (tendency to experience negative emotions like worry and irritability) and **Social Inhibition** (tendency to inhibit self-expression in social interactions due to fear of rejection). 1. **Why Coronary Artery Disease (CAD) is correct:** Extensive psychosomatic research has linked Type D personality to a significantly increased risk of adverse cardiovascular outcomes. These individuals experience chronic psychological stress but suppress their emotions, leading to prolonged physiological arousal, increased cortisol levels, and inflammation. This contributes to the pathogenesis of atherosclerosis and predicts a poorer prognosis (including recurrent myocardial infarction and mortality) in patients already diagnosed with CAD. 2. **Why other options are incorrect:** * **Depression:** While Type D individuals are prone to negative moods, the personality construct is specifically validated as an independent risk factor for *cardiovascular* health rather than a primary precursor to clinical Major Depressive Disorder. * **Schizophrenia & Mania:** These are major psychotic and mood disorders with strong genetic and neurobiological bases. There is no established clinical correlation between Type D personality traits and the development of these conditions. **High-Yield Clinical Pearls for NEET-PG:** * **Type A Personality:** Characterized by time urgency, competitiveness, and **hostility**. It is also linked to CAD (specifically the hostility component). * **Type B Personality:** Relaxed, easy-going, and less stressed; considered "heart-protective." * **Type C Personality:** Characterized by emotional suppression and compliance; historically (though controversially) linked to **Cancer** (specifically breast cancer). * **Type D (Distressed):** High Negative Affectivity + Social Inhibition = **CAD Prognosis.**

Question 189: A 20-year-old female presents with complaints of nausea, vomiting, and pain in her legs. Her physical examination and laboratory investigations are normal. What is the most probable diagnosis?

A. Generalized anxiety disorder
B. Conversion disorder
C. Somatoform pain disorder (Correct Answer)
D. Somatization disorder

Explanation: **Explanation:** The patient presents with multiple physical symptoms (nausea, vomiting, and leg pain) in the absence of any organic pathology or abnormal laboratory findings. This clinical picture is characteristic of **Somatoform Disorders**, where psychological distress manifests as physical symptoms. **Why Somatoform Pain Disorder is correct:** The primary complaint in this scenario is localized pain (leg pain) that cannot be explained by a medical condition. In **Somatoform Pain Disorder** (ICD-10), the predominant symptom is persistent, severe, and distressing pain which is not adequately explained by a physiological process and is often associated with emotional conflict or psychosocial problems. **Analysis of Incorrect Options:** * **Generalized Anxiety Disorder (GAD):** While GAD can have physical symptoms (muscle tension, restlessness), the core feature is excessive, uncontrollable worry about various events for at least 6 months, which is not mentioned here. * **Conversion Disorder (Functional Neurological Symptom Disorder):** This involves deficits in **voluntary motor or sensory functions** (e.g., blindness, paralysis, seizures) that are incompatible with known neurological conditions. Nausea and vomiting are autonomic/gastrointestinal, not motor/sensory deficits. * **Somatization Disorder:** This requires a chronic history (starting before age 30) of **multiple** symptoms across different organ systems (e.g., 4 pain, 2 GI, 1 sexual, and 1 pseudoneurological symptom). While this patient has multiple symptoms, the focus on pain makes Somatoform Pain Disorder the more specific diagnosis for a single presentation. **High-Yield Clinical Pearls for NEET-PG:** * **Somatization Disorder (Briquet’s Syndrome):** Characterized by "many symptoms, many years, many doctors." * **Hypochondriasis (Illness Anxiety Disorder):** Fear of *having* a serious disease based on misinterpretation of bodily sensations, despite reassurance. * **Factitious Disorder:** Symptoms are intentionally produced to assume the "sick role" (no external incentive). * **Malingering:** Intentional production of symptoms for **secondary gain** (e.g., insurance money, avoiding work/jail).

Question 190: A 46-year-old male presents with sudden blankness of thought and accuses you of stealing his thoughts. What is the most likely diagnosis?

A. Thought block
B. Thought withdrawal (Correct Answer)
C. Neologism
D. Perseveration

Explanation: ### Explanation The patient is experiencing **Thought Withdrawal**, a classic **delusion of thought possession**. In this phenomenon, the patient experiences a sudden cessation of thought and attributes this "blankness" to an external agency or person (in this case, the doctor) physically removing or "stealing" the thoughts from their mind. This is a **First Rank Symptom (FRS)** of Schizophrenia as described by Kurt Schneider. **Analysis of Options:** * **Thought Withdrawal (Correct):** The key differentiator here is the **external attribution**. The patient doesn't just lose their train of thought; they believe it was taken by someone else. * **Thought Block:** This is a formal thought disorder where the patient experiences a sudden, involuntary stop in the flow of thought. While the patient feels "blank," they do *not* necessarily attribute it to an external force stealing the thought. * **Neologism:** This refers to the coining of new words that have no recognized meaning to others, often seen in schizophrenia. It is a disorder of the *content/form* of thought, not possession. * **Perseveration:** This is the inappropriate persistence or repetition of a response (word, phrase, or gesture) beyond the point of relevance, often associated with organic brain disease or schizophrenia. **Clinical Pearls for NEET-PG:** * **Schneiderian First Rank Symptoms (FRS):** Include thought withdrawal, thought insertion, and thought broadcasting. * **Passivity Phenomena:** Thought withdrawal is a type of passivity where the patient feels they are no longer the master of their own mental processes. * **Differential:** While thought blocking can occur in high anxiety, **thought withdrawal** is almost pathognomonic for Schizophrenia.

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Clinical Interview Techniques

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Mental Status Examination

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Diagnostic Formulation

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Rating Scales and Questionnaires

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Psychological Testing

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Neuropsychological Assessment

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Risk Assessment

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Laboratory Investigations in Psychiatry

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Neuroimaging in Clinical Assessment

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Cultural Considerations in Assessment

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Developmental Assessment

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Diagnostic Classification Systems

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