Psychotic Disorders Practice Questions

Q: A patient with schizophrenia is convinced that she has caused a recent earthquake because she was bored and wishing for something exciting to occur. Which of the following symptoms describes this patient's thoughts?

Magical thinking. **Explanation:** The correct answer is **Magical thinking**. This is a cognitive distortion where a person believes that their thoughts, words, or actions can cause or prevent specific outcomes in a way that defies the laws of cause and effect. In this case, the patient believes her internal desire for excitement directly caused a physical, geological event (an earthquake). While common in normal childhood development, in adults, it is a frequent feature of Schizotypal Personality Disorder and Schizophrenia. **Analysis of Incorrect Options:** * **A. Thought broadcasting:** This is a delusion where the patient believes their private thoughts are being transmitted out loud so that others can hear them. * **C. Echolalia:** This is a formal thought disorder/speech sign characterized by the senseless, parrot-like repetition of words or phrases spoken by another person. * **D. Nihilism:** Also known as Cotard’s syndrome, this is a delusion where the patient believes that they, a part of their body, or the world itself does not exist or is "dead." **Clinical Pearls for NEET-PG:** * **Magical Thinking vs. Delusion of Influence:** While magical thinking involves a causal link between thoughts and events, a **delusion of influence** (Passivity phenomenon) specifically involves the belief that one’s body or actions are being controlled by an external force (Schneiderian First Rank Symptom). * **Key Association:** Magical thinking is a diagnostic criterion for **Schizotypal Personality Disorder**. * **Thought Broadcasting** is a **Schneiderian First Rank Symptom (FRS)**, whereas magical thinking is not.

Q: Which of the following is a psychosis?

Mania. ### Explanation In psychiatry, disorders are broadly categorized into **Psychosis** and **Neurosis**. The fundamental distinction lies in the **insight** (the patient’s awareness of their illness) and the **reality testing** (the ability to distinguish internal fantasies from external reality). **Why Mania is the Correct Answer:** Mania is a state of abnormally elevated arousal, affect, and energy level. It is classified as a **psychotic disorder** (specifically under Mood/Affective Disorders) because, during a manic episode, a patient typically lacks insight and experiences a significant break from reality. Severe mania often presents with psychotic features such as **delusions of grandeur** (e.g., believing they have special powers) or hallucinations. **Analysis of Incorrect Options:** * **A, B, and C (OCD, Phobia, and Anxiety):** These are classified as **Neurotic or Stress-related disorders**. In these conditions: * **Insight is preserved:** The patient is aware that their thoughts or fears are irrational or excessive. * **Reality testing is intact:** There is no gross distortion of external reality (no delusions or hallucinations). * **Personality** remains relatively organized compared to psychotic states. **High-Yield Clinical Pearls for NEET-PG:** * **Insight:** The hallmark of neurosis is present insight; the hallmark of psychosis is absent insight. * **Major Psychoses:** Include Schizophrenia, Mood Disorders (Mania/Depression with psychotic features), and Delusional Disorders. * **Pseudo-hallucinations:** Often seen in neurosis (the patient knows the perception isn't real), whereas true hallucinations are a core feature of psychosis. * **ICD-10/DSM-5:** While modern classifications move away from the "Neurosis vs. Psychosis" terminology, it remains a high-yield concept for competitive exams.

Q: Which of the following MRI findings is FALSE in schizophrenia?

Cortical thickening. **Explanation:** In Schizophrenia, the structural brain changes are characterized by **neurodegeneration and volume loss**, rather than growth. Therefore, **Option B (Cortical thickening) is FALSE** because Schizophrenia is associated with **cortical thinning**, particularly in the prefrontal and temporal regions, due to reduced neuropil (dendritic branching and synaptic density) rather than a loss of cell bodies. **Analysis of other options:** * **Option A (Increased ventricular volume):** This is the most consistent finding in Schizophrenia. Lateral and third ventricular enlargement occurs due to the loss of surrounding brain parenchyma (ventriculomegaly). * **Option C & D (Reduced volume of temporal and hippocampal lobes):** Structural MRI typically shows a 5–10% reduction in total brain volume. Specifically, the **limbic system** (hippocampus, amygdala, and parahippocampal gyrus) and the **superior temporal gyrus** show significant volume reduction, which correlates with positive symptoms like auditory hallucinations and memory deficits. **High-Yield NEET-PG Pearls:** 1. **Most common MRI finding:** Enlargement of lateral ventricles. 2. **Key area of volume loss:** Hippocampus and Thalamus. 3. **Functional Imaging (PET/SPECT):** Shows **Hypofrontality** (reduced blood flow/glucose metabolism in the prefrontal cortex during executive tasks). 4. **Neuropathology:** Unlike Alzheimer’s, Schizophrenia does **not** show prominent gliosis; it is considered a neurodevelopmental disorder with progressive features.

Q: What is the meaning of the term schizophrenia?

Split mind. **Explanation:** The term **Schizophrenia** was coined by the Swiss psychiatrist **Eugen Bleuler** in 1908. It is derived from the Greek words *'schizein'* (to split) and *'phren'* (mind). 1. **Why "Split mind" is correct:** Bleuler used this term to describe a "splitting" or fragmentation of various mental functions—specifically the separation between emotion, thought, and behavior (e.g., a patient laughing while describing a tragic event). It does **not** refer to multiple personality disorder (Dissociative Identity Disorder), which is a common misconception. 2. **Why other options are incorrect:** * **Free mind:** This has no clinical relevance to the pathology of psychosis. * **Euphoric mind:** Euphoria is a characteristic of Mania (Bipolar Disorder), not the core feature of Schizophrenia. * **Confused mind:** While patients may appear disorganized, "confusion" typically refers to a clouding of consciousness, which is the hallmark of **Delirium** (Organic Brain Syndrome). In Schizophrenia, consciousness usually remains clear. **High-Yield Clinical Pearls for NEET-PG:** * **Eugen Bleuler** also described the **4 A's** of Schizophrenia: **A**ffective blunting, **A**mbivalence, **A**utism (social withdrawal), and **A**ssociative looseness. * **Emil Kraepelin** previously called this condition **Dementia Praecox** (premature dementia), focusing on its early onset and deteriorating course. * **Schneider’s First Rank Symptoms (FRS)** are the most commonly tested diagnostic criteria for Schizophrenia in exams. * The primary neurotransmitter abnormality involved is **excess Dopamine** in the mesolimbic pathway.

Q: Which of the following diseases is associated with hyperactivity of the mesocortical dopaminergic system?

Schizophrenia. ### Explanation The correct answer is **Schizophrenia**. This question is based on the **Dopamine Hypothesis of Schizophrenia**, which suggests that symptoms are caused by dysregulation of dopamine (DA) in specific brain pathways. **1. Why Schizophrenia is Correct:** Schizophrenia involves two distinct dopaminergic abnormalities: * **Mesolimbic Pathway:** Hyperactivity (increased DA) leads to **positive symptoms** (hallucinations, delusions). * **Mesocortical Pathway:** Hypoactivity (decreased DA) leads to **negative symptoms** (apathy, withdrawal) and cognitive deficits. * *Note:* While the question mentions "hyperactivity" of the mesocortical system, it is traditionally associated with **hypoactivity**. However, among the given options, Schizophrenia is the only disorder primarily defined by dopaminergic dysregulation in these specific cortical/limbic circuits. **2. Why Other Options are Incorrect:** * **Huntington’s Chorea:** Associated with hyperactivity of dopamine in the **Nigrostriatal pathway** (leading to chorea) and a deficiency of GABA and Acetylcholine in the basal ganglia. * **Parkinson’s Disease:** Caused by **hypoactivity** (destruction of dopaminergic neurons) in the **Nigrostriatal pathway** (Substantia Nigra pars compacta). * **Depression:** Primarily linked to deficiencies in **Serotonin (5-HT)** and **Norepinephrine**, rather than primary mesocortical dopamine hyperactivity. **3. NEET-PG High-Yield Pearls:** * **Nigrostriatal Pathway:** Controls motor function; blockade here by antipsychotics causes **Extrapyramidal Side Effects (EPS)**. * **Tuberoinfundibular Pathway:** Controls prolactin secretion; blockade here leads to **hyperprolactinemia** (galactorrhea, gynecomastia). * **Negative Symptoms Treatment:** Atypical antipsychotics (e.g., Clozapine) are preferred as they modulate serotonin-dopamine receptors to improve mesocortical function.

Q: Which of the following is a good prognostic factor in schizophrenia?

Presence of precipitating factors. **Explanation:** The prognosis of schizophrenia is influenced by several clinical and demographic variables. The presence of **precipitating factors** (Option D) is a strong indicator of a **good prognosis**. This is because an illness triggered by a clear external stressor (e.g., bereavement, financial loss, or trauma) often suggests a reactive process rather than an ingrained constitutional vulnerability. Such cases typically have an acute onset and respond better to treatment compared to "insidious" cases where the illness develops without a clear cause. **Analysis of Incorrect Options:** * **Early age of appearance (Option A):** Early onset (childhood or adolescence) is a **poor prognostic factor**. It is often associated with structural brain abnormalities, poor premorbid adjustment, and a more chronic course. * **Male sex (Option B):** Males generally have a **poorer prognosis** than females. Men tend to have an earlier onset, more negative symptoms, and a less robust response to antipsychotics. * **Presence of negative symptoms (Option C):** Negative symptoms (e.g., apathy, anhedonia, poverty of speech) are associated with a **poor prognosis**. They are often resistant to typical antipsychotics and lead to significant social and occupational disability. **High-Yield Clinical Pearls for NEET-PG:** * **Good Prognostic Factors:** Late onset, female sex, married status, acute onset, presence of mood symptoms (especially depression), and good premorbid functioning. * **Poor Prognostic Factors:** Insidious onset, family history of schizophrenia, single/divorced status, and frequent relapses. * **Most common subtype** with a good prognosis is **Paranoid Schizophrenia**, while **Hebephrenic (Disorganized)** schizophrenia carries the worst prognosis.

Q: Which of the following is not included in delusional misidentification syndromes?

Syndrome of objective doubles. **Explanation:** **Delusional Misidentification Syndromes (DMS)** are a group of disorders where a patient misidentifies people, places, or objects, believing their identity has been altered or replaced. **Why Option D is Correct:** The term **"Syndrome of objective doubles"** is not a recognized clinical entity in psychiatry. The correct term is the **Syndrome of Subjective Doubles**, in which the patient believes that a doppelgänger (a double of themselves) is living a life of its own. Because "objective doubles" is a non-existent term, it is the correct answer to this "except" style question. **Analysis of Incorrect Options:** * **A. Capgras Syndrome:** The most common DMS. The patient believes a person close to them (e.g., a spouse) has been replaced by an identical-looking **imposter**. * **B. Fregoli Syndrome:** The patient believes that different people are actually a **single familiar person** in disguise (the opposite of Capgras). * **C. Syndrome of Intermetamorphosis:** The patient believes that people have swapped identities with each other both physically and psychologically. **NEET-PG High-Yield Pearls:** * **Anatomical Correlation:** DMS is often associated with lesions in the **Right Cerebral Hemisphere** (specifically the bifrontal or right temporoparietal regions). * **Associated Conditions:** While seen in Schizophrenia, these syndromes are highly associated with **Organic Brain Disorders** (e.g., Dementia, Right-sided stroke). * **Reduplicative Paramnesia:** Another DMS where a patient believes a physical location (like a hospital) has been duplicated or moved to another site.

Q: What is the prevalence of schizophrenia in dizygotic twins of a patient with schizophrenia?

12%. **Explanation:** The risk of developing schizophrenia is heavily influenced by genetic proximity. This question tests your knowledge of the **heritability patterns** of schizophrenia. **1. Why 12% is Correct:** The prevalence of schizophrenia in the general population is approximately **1%**. However, for a **dizygotic (fraternal) twin** of an affected individual, the risk increases significantly to approximately **12%**. This is because dizygotic twins share 50% of their genetic material, similar to non-twin siblings. The slight increase over regular siblings (who have an 8%–10% risk) is often attributed to shared prenatal environments. **2. Analysis of Incorrect Options:** * **Option A (40%):** This is incorrect for dizygotic twins but close to the risk for **monozygotic (identical) twins**, which is approximately **47%–50%**. Monozygotic twins share 100% of their DNA. * **Option B (1%):** This represents the **lifetime prevalence in the general population**, not the risk for a first-degree relative. * **Option D (0.10%):** This value is significantly lower than the baseline population risk and is clinically inaccurate. **High-Yield Clinical Pearls for NEET-PG:** * **Highest Risk:** If both parents have schizophrenia, the risk to the offspring is approximately **40%–46%**. * **Monozygotic Twins:** ~47% concordance rate (highest risk for a single relative). * **Dizygotic Twins/Siblings/Children of one parent:** ~10%–12% risk. * **Second-degree relatives (Uncles/Aunts):** ~2% risk. * **Adoption Studies:** These have been crucial in proving that the risk remains high even if the child is raised away from the biological parent, confirming a strong genetic component over purely environmental factors.

Q: A 70-year-old male presents with a history of auditory hallucinations and third-person auditory hallucinations. He has no prior history of similar problems. What is the most likely diagnosis?

Schizophrenia. **Explanation:** The presence of **third-person auditory hallucinations** (voices talking about the patient in the third person) is a classic **Schneiderian First-Rank Symptom (FRS)**. These symptoms are highly characteristic of **Schizophrenia**. While Schizophrenia typically presents in early adulthood, "Very Late-Onset Schizophrenia-Like Psychosis" can occur in patients over age 60, presenting with prominent hallucinations and delusions. **Why the other options are incorrect:** * **Dementia:** While psychotic symptoms can occur in dementia (especially Lewy Body Dementia), the primary clinical feature must be cognitive decline and memory impairment, which are not mentioned here. * **Delusional Disorder:** This diagnosis is characterized by non-bizarre delusions *without* prominent hallucinations. The presence of auditory hallucinations generally excludes this diagnosis. * **Acute Psychosis (Brief Psychotic Disorder):** This diagnosis requires the symptoms to last more than one day but less than one month, often triggered by a stressor. The question implies a stable clinical picture of complex hallucinations, making Schizophrenia the more definitive academic answer for FRS. **Clinical Pearls for NEET-PG:** * **Schneider’s First-Rank Symptoms (FRS):** Includes audible thoughts (thought echo), voices arguing, voices commenting (3rd person), somatic passivity, and thought withdrawal/insertion/broadcast. * **Late-onset Schizophrenia:** More common in females and often associated with sensory deficits (hearing/vision loss). * **Diagnostic Tip:** If a question mentions "voices commenting on the patient's actions" or "voices arguing," always prioritize Schizophrenia as the diagnosis.

Question 1

A patient with schizophrenia is convinced that she has caused a recent earthquake because she was bored and wishing for something exciting to occur. Which of the following symptoms describes this patient's thoughts?

Accepted Answer

Magical thinking

Answer

Thought broadcasting

Answer

Echolalia

Answer

Nihilism

Question 2

Which of the following is a psychosis?

Accepted Answer

Mania

Answer

Obsessive-Compulsive Disorder (OCD)

Answer

Phobia

Answer

Anxiety

Question 3

Which of the following MRI findings is FALSE in schizophrenia?

Accepted Answer

Cortical thickening

Answer

Increased ventricular volume

Answer

Reduced volume of temporal lobe

Answer

Reduced volume of hippocampal lobe

Question 4

What is the meaning of the term schizophrenia?

Accepted Answer

Split mind

Answer

Free mind

Answer

Euphoric mind

Answer

Confused mind

Question 5

Which of the following diseases is associated with hyperactivity of the mesocortical dopaminergic system?

Accepted Answer

Schizophrenia

Answer

Huntington's chorea

Answer

Parkinson's disease

Answer

Depression

Question 6

A man reports that the day after assaulting his neighbour, he feels that the police are pursuing him and that his brain is being controlled by radio waves originating from his neighbour. What is the probable diagnosis?

Accepted Answer

Delusions of persecution

Answer

Personality disorder

Answer

Passivity feelings

Answer

Organic brain syndrome

Question 7

Which of the following is a good prognostic factor in schizophrenia?

Accepted Answer

Presence of precipitating factors

Answer

Early age of appearance

Answer

Male sex

Answer

Presence of negative symptoms

Question 8

Which of the following is not included in delusional misidentification syndromes?

Accepted Answer

Syndrome of objective doubles

Answer

Capgras syndrome

Answer

Fregoli syndrome

Answer

Syndrome of intermetamorphosis

Question 9

What is the prevalence of schizophrenia in dizygotic twins of a patient with schizophrenia?

Accepted Answer

12%

Answer

40%

Answer

1%

Answer

0.10%

Question 10

A 70-year-old male presents with a history of auditory hallucinations and third-person auditory hallucinations. He has no prior history of similar problems. What is the most likely diagnosis?

Accepted Answer

Schizophrenia

Answer

Dementia

Answer

Delusional disorder

Answer

Acute psychosis

Psychotic Disorders — MCQs

Psychotic Disorders — MCQs

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