Psychiatric Assessment and Diagnosis Practice Questions

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

Learning. **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.

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

Delusion. 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.

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

Intelligence. **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.

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

Normal. ### 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.

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

Thought withdrawal. ### 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.

Question 1

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

Accepted Answer

Learning

Answer

Implicit memory

Answer

Intelligence

Answer

Language

Question 2

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

Accepted Answer

Delusion

Answer

Obsessive compulsive neurosis

Answer

Schizophrenia

Answer

Loosening of association

Question 3

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

Accepted Answer

Intelligence

Answer

Memory

Answer

Orientation

Answer

Speech

Question 4

Which of the following signs is not characteristic of conversion disorder?

Accepted Answer

Cogwheel rigidity

Answer

Astasia-abasia

Answer

Hemianesthesia of the body at the midline

Answer

Normal reflexes

Question 5

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?

Accepted Answer

Frontotemporal dementia

Answer

Alzheimer's disease

Answer

Vascular dementia

Answer

Lewy body dementia

Question 6

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

Accepted Answer

Normal

Answer

Imbecile

Answer

Moron

Answer

Near Genius

Question 7

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

Accepted Answer

Gender dysphoria

Answer

Transvestism

Answer

Voyeurism

Answer

Paraphilias

Question 8

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

Accepted Answer

Coronary artery disease

Answer

Depression

Answer

Schizophrenia

Answer

Mania

Question 9

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?

Accepted Answer

Somatoform pain disorder

Answer

Generalized anxiety disorder

Answer

Conversion disorder

Answer

Somatization disorder

Question 10

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

Accepted Answer

Thought withdrawal

Answer

Thought block

Answer

Neologism

Answer

Perseveration

Psychiatric Assessment and Diagnosis — MCQs

Psychiatric Assessment and Diagnosis — MCQs

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