Psychotic Disorders Practice Questions

Q: Microcephaly is related to which of the following conditions?

Schizophrenia. **Explanation:** **Correct Option: D. Schizophrenia** While Schizophrenia is primarily a psychiatric disorder, it is increasingly recognized as a neurodevelopmental condition. Neuroimaging and post-mortem studies have consistently demonstrated structural brain abnormalities in schizophrenic patients, including **reduced intracranial volume** and **decreased gray matter volume**. This reduction in brain size often manifests as a lower-than-average head circumference (microcephaly) compared to healthy controls, likely due to impaired neurogenesis or excessive synaptic pruning during development. **Analysis of Incorrect Options:** * **A. Alexander Disease:** This is a leukodystrophy caused by mutations in the *GFAP* gene. It typically presents with **macrocephaly** (megalencephaly) due to the accumulation of Rosenthal fibers and white matter destruction. * **B. Tuberous Sclerosis:** While it causes cortical tubers and subependymal nodules, it is not classically associated with microcephaly. In some cases, it can lead to obstructive hydrocephalus (due to SEGA), which would cause **macrocephaly**. * **C. Cowden Disease:** Part of the PTEN hamartoma tumor syndrome, this condition is a classic cause of **macrocephaly** (specifically megalencephaly) along with multiple hamartomas. **High-Yield Clinical Pearls for NEET-PG:** * **Macrocephaly (Megalencephaly) Differentials:** Alexander disease, Canavan disease, Cowden syndrome, Sotos syndrome, and Neurofibromatosis type 1. * **Microcephaly Differentials:** TORCH infections (especially Zika and CMV), Fetal Alcohol Syndrome, Down Syndrome, and Rett Syndrome. * **Schizophrenia Fact:** The most common structural finding on MRI in Schizophrenia is **enlargement of the lateral ventricles** (ventriculomegaly) secondary to decreased cortical volume.

Q: Folie à deux is a psychiatric syndrome in which symptoms of a delusionally biased belief system are shared by two or more individuals with unusually close social relationships. Which of the following conditions is most commonly associated with Folie à deux?

Paranoid disorder. **Explanation:** **Folie à deux**, also known as **Shared Psychotic Disorder** (ICD-10: Induced Delusional Disorder), is a rare syndrome where a delusion is transmitted from one individual (the primary/inducer) to another (the secondary/recipient) who are closely related. **Why Paranoid Disorder is Correct:** The core feature of Folie à deux is a **delusion**, most commonly of a **persecutory (paranoid)** nature. The "inducer" typically suffers from a chronic psychotic illness, most frequently **Delusional Disorder (Paranoid Disorder)** or Schizophrenia. The recipient, who is often suggestible or dependent, adopts the inducer’s paranoid belief system due to social isolation and a close emotional bond. **Why Other Options are Incorrect:** * **Obsessive-Compulsive Disorder (A):** Characterized by intrusive thoughts and repetitive behaviors, not fixed false beliefs (delusions). * **Hysteria (C):** Now termed Dissociative or Conversion disorders; these involve physical symptoms or memory loss triggered by psychological stress, not shared delusional systems. * **Neurasthenia (D):** An archaic term for a condition involving fatigue, headache, and irritability; it lacks psychotic features. **NEET-PG High-Yield Pearls:** * **Management:** The primary treatment for the "recipient" is **separation** from the inducer, which often leads to the disappearance of the shared delusion. The inducer requires standard antipsychotic therapy. * **Subtypes:** If more than two people are involved, it is called *folie à trois* (three), *folie à quatre* (four), or *folie à plusieurs* (many). * **Risk Factors:** Social isolation from the outside world is the most significant factor facilitating the transfer of the delusion.

Q: A delusional belief about having a subjective double is called:

Doppelganger. **Explanation:** The correct answer is **Doppelganger (Option A)**. This phenomenon, also known as the "phenomenon of the double," is a delusional belief where a person believes they have a subjective double who looks exactly like them and exists in the external world. Unlike other visual hallucinations, the patient does not necessarily see the double with their eyes but "knows" it exists, often perceiving it as an omen of bad luck or death. **Analysis of Options:** * **Autoscopy (Option B):** This is a visual hallucination where the individual sees an image of themselves in external space (an "out-of-body" experience). The key difference is that Autoscopy is a **perceptual** experience (seeing), whereas a Doppelganger is primarily a **delusional** belief or a sense of presence. * **Delusion of Misidentification (Option C):** This is a broad category of syndromes (like Capgras or Fregoli) where patients misidentify familiar people or places. While Doppelganger is technically a subtype, it specifically refers to the "subjective double" of the self, making Option A the most specific answer. * **Depersonalization (Option D):** This is a dissociative symptom where the individual feels detached from themselves, as if they are an outside observer of their own body or mental processes. There is no "double" involved; rather, the self feels "unreal." **High-Yield Clinical Pearls for NEET-PG:** * **Capgras Syndrome:** The belief that a familiar person has been replaced by an identical-looking impostor (the most common delusional misidentification). * **Fregoli Syndrome:** The belief that different people are actually a single person in disguise. * **Intermetamorphosis:** The belief that people have swapped identities with each other both physically and psychologically. * **Heautoscopy:** A variant of autoscopy where the person sees their double but is unsure which "self" is the real one.

Q: All are negative symptoms of schizophrenia, except:

Hallucination. To understand schizophrenia symptoms for NEET-PG, it is essential to distinguish between **Positive** and **Negative** symptoms using the framework of Crow’s Type I and Type II syndromes. ### **Explanation** **Positive symptoms** (Option B) represent an "excess" or distortion of normal function. **Hallucinations** (perception in the absence of external stimuli) and **Delusions** are the hallmark positive symptoms. These are typically associated with dopaminergic hyperactivity in the mesolimbic pathway and generally show a good response to typical antipsychotics. **Negative symptoms** (Options A, C, and D) represent a "loss" or deficit of normal functions. They are often associated with structural brain changes (e.g., ventricular enlargement) and dopaminergic hypoactivity in the mesocortical pathway. * **Anhedonia (Option A):** The inability to experience pleasure from activities usually found enjoyable. * **Alogia (Option C):** Poverty of speech or a reduction in the amount/content of spontaneous speech. * **Affective Flattening (Option D):** A restricted range of emotional expression, characterized by a lack of facial expression and poor eye contact. ### **High-Yield NEET-PG Pearls** * **The 5 A’s of Negative Symptoms:** **A**ffective flattening, **A**logia, **A**volition (lack of motivation), **A**nhedonia, and **A**ttentional impairment. * **Schneider’s First Rank Symptoms (FRS):** These are primarily **positive symptoms** (e.g., audible thoughts, somatic passivity, delusional perception). Note that negative symptoms are *not* part of Schneider’s FRS. * **Prognosis:** The presence of predominant negative symptoms is a predictor of **poor prognosis**, poor social functioning, and resistance to traditional antipsychotic treatment. * **Treatment:** While typical antipsychotics treat positive symptoms, **Atypical Antipsychotics** (e.g., Clozapine, Cariprazine) are preferred for managing negative symptoms.

Q: What is true about late-onset schizophrenia?

Onset after 45 years. ### Explanation **1. Why Option A is Correct:** Schizophrenia typically presents in late adolescence or early adulthood. However, **Late-onset Schizophrenia** is defined as the onset of symptoms **after the age of 45**. It is more common in women and is often characterized by well-organized paranoid delusions and auditory hallucinations. **2. Analysis of Incorrect Options:** * **Option B (Onset between 25-30 years):** This is the typical age of onset for "early-onset" or "standard" schizophrenia (males: 15–25 years; females: 25–35 years). Onset after 60 years is specifically termed "Very-late-onset schizophrenia-like psychosis." * **Option C (Prognosis is poor):** This is incorrect. Late-onset schizophrenia generally has a **better prognosis** than early-onset forms. These patients usually have better premorbid social and occupational functioning, fewer negative symptoms (like apathy or withdrawal), and a better response to lower doses of antipsychotic medication. * **Option D (Olfactory hallucinations are common):** Auditory hallucinations remain the most common type in late-onset schizophrenia. Olfactory or gustatory hallucinations are rare and should always prompt an investigation into organic causes, such as temporal lobe epilepsy or tumors. **3. High-Yield Clinical Pearls for NEET-PG:** * **Gender Ratio:** Unlike early-onset schizophrenia (where M=F), late-onset is significantly more common in **females**. * **Symptom Profile:** Late-onset cases show **fewer negative symptoms** and less formal thought disorder compared to younger patients. * **Sensory Deficits:** There is a strong association between late-onset schizophrenia and **sensory impairments**, particularly hearing loss (presbycusis). * **Treatment:** Patients usually require **lower doses** of antipsychotics due to age-related changes in metabolism and increased sensitivity to extrapyramidal side effects.

Q: What are the biochemical abnormalities implicated in schizophrenia?

Increased dopamine and increased serotonin. ### Explanation The biochemical basis of schizophrenia is primarily explained by the **Dopamine Hypothesis** and the **Serotonin Hypothesis**. **Why Option B is Correct:** 1. **Dopamine Hypothesis:** Schizophrenia is associated with **increased dopaminergic activity** in the mesolimbic pathway (responsible for positive symptoms like hallucinations and delusions). While there is a decrease in the mesocortical pathway (leading to negative symptoms), the overall classic teaching for exams emphasizes "increased dopamine." 2. **Serotonin Hypothesis:** Research and the efficacy of **Atypical Antipsychotics** (Second Generation Antipsychotics like Risperidone and Clozapine) highlight the role of **increased serotonin (5-HT)**. These drugs act as 5-HT2A receptor antagonists, proving that serotonin excess contributes to the pathogenesis, particularly modulating dopamine release. **Why Other Options are Incorrect:** * **Options C & D:** Decreased dopamine levels are generally associated with Parkinson’s disease or the side effects of antipsychotic medications (Extrapyramidal symptoms), not the primary pathology of schizophrenia. * **Option A:** While dopamine is the most famous neurotransmitter involved, focusing solely on dopamine ignores the significant role of serotonin, which is a key target in modern psychiatric management. **High-Yield Clinical Pearls for NEET-PG:** * **Glutamate Hypothesis:** Decreased NMDA receptor activity (hypofunction) is also implicated in schizophrenia. * **Pathways to Remember:** * **Mesolimbic:** ↑ Dopamine → Positive Symptoms. * **Mesocortical:** ↓ Dopamine → Negative Symptoms. * **Nigrostriatal:** Blockade here leads to EPS (Extrapyramidal Symptoms). * **Tuberoinfundibular:** Blockade here leads to Hyperprolactinemia. * **GABA:** There is often a decrease in GABAergic inhibitory neurotransmission in the prefrontal cortex of schizophrenic patients.

Q: A 40-year-old woman with a long-standing history of chronic depression states, "My belly and chest are empty. All my organs are gone. I don't exist. I'm dead." What type of delusion is this patient presenting with?

Nihilistic delusions. ### Explanation **Correct Answer: C. Nihilistic delusions** **1. Why it is correct:** The patient is exhibiting **nihilistic delusions** (also known as **Cotard’s syndrome** or "walking corpse syndrome"). These are characterized by the false belief that one is dead, non-existent, or that their internal organs have rotted or disappeared. In this case, the patient’s statements ("organs are gone," "I don't exist," "I'm dead") are classic manifestations. These delusions are most commonly associated with **severe psychotic depression**, but can also occur in schizophrenia or organic brain syndromes. **2. Why the other options are incorrect:** * **A & B. Paranoid/Persecutory delusions:** These involve the belief that one is being followed, harassed, or conspired against by others. The patient’s focus here is on self-existence, not external threats. * **D. Delusions of reference:** This is the false belief that neutral external events (like a news report or a stranger’s conversation) have a special, personal meaning or message intended specifically for the patient. **3. High-Yield Clinical Pearls for NEET-PG:** * **Cotard’s Syndrome:** A specific triad of nihilistic delusions, melancholic depression, and self-harm/insensitivity to pain. * **Key Association:** While delusions are a hallmark of schizophrenia, nihilistic delusions are a **high-yield indicator of severe depressive psychosis** in exam questions. * **Schneider’s First Rank Symptoms (FRS):** Remember that nihilistic delusions are **not** part of Schneider’s FRS; they are mood-congruent psychotic features. * **Treatment:** Severe cases with nihilistic delusions often require **Electroconvulsive Therapy (ECT)** due to the high risk of self-neglect and refusal to eat.

Q: Which of the following is FALSE regarding schizophrenia?

Sustained mood changes. **Explanation:** Schizophrenia is primarily a **disorder of thought and perception**, whereas **sustained mood changes** (persistent elevation or depression) are the hallmark of **Mood Disorders** (like Bipolar Disorder or Major Depressive Disorder). While patients with schizophrenia may exhibit "blunted affect" or "inappropriate emotions," these are disturbances in the *expression* of emotion rather than a sustained pathological mood state. **Analysis of Options:** * **Sustained mood changes (Correct):** This is the false statement. If sustained mood symptoms are prominent, the diagnosis shifts toward Schizoaffective Disorder or a primary Mood Disorder with psychotic features. * **Third-person auditory hallucinations:** These are classic **Schneiderian First Rank Symptoms (FRS)**. Examples include hearing voices arguing about the patient or a running commentary on the patient's actions. * **Inappropriate emotions:** Also known as **incongruous affect**, this is a core feature where the patient’s emotional response does not match the context (e.g., laughing while describing a tragedy). * **Formal thought disorder:** This refers to a disorganized thinking process manifested through speech, such as loosening of associations, word salad, or neologisms. It is a diagnostic pillar of schizophrenia. **High-Yield Clinical Pearls for NEET-PG:** * **Schneider’s First Rank Symptoms (FRS):** Includes audible thoughts, third-person hallucinations, somatic passivity, and delusional perception. * **Bleuler’s 4 A’s:** Ambivalence, Autism (social withdrawal), Affective blunting, and Association looseness. * **Prognosis:** Good prognostic factors include late onset, female sex, presence of mood symptoms (ironically), and positive symptoms. Poor prognosis is linked to early onset, male sex, and negative symptoms.

Question 1

Microcephaly is related to which of the following conditions?

Accepted Answer

Schizophrenia

Answer

Alexander disease

Answer

Tuberous sclerosis

Answer

Cowden disease

Question 2

Folie à deux is a psychiatric syndrome in which symptoms of a delusionally biased belief system are shared by two or more individuals with unusually close social relationships. Which of the following conditions is most commonly associated with Folie à deux?

Accepted Answer

Paranoid disorder

Answer

Obsessive-Compulsive Disorder

Answer

Hysteria

Answer

Neurasthenia

Question 3

A delusional belief about having a subjective double is called:

Accepted Answer

Doppelganger

Answer

Autoscopy

Answer

Delusion of misidentification

Answer

Depersonalization

Question 4

Which of the following is a first-rank symptom in Schizophrenia?

Accepted Answer

Thought insertion

Answer

Delusions

Answer

Perceptional hallucinations

Answer

Word salad

Question 5

All are negative symptoms of schizophrenia, except:

Accepted Answer

Hallucination

Answer

Anhedonia

Answer

Alogia

Answer

Affective flattening

Question 6

Which of the following indicates a poor prognosis in Schizophrenia?

Accepted Answer

Insidious onset

Answer

Late age at onset

Answer

Family history of mania

Answer

Type I Schizophrenia

Question 7

What is true about late-onset schizophrenia?

Accepted Answer

Onset after 45 years

Answer

Onset between 25-30 years

Answer

Prognosis is poor

Answer

Olfactory hallucinations are common

Question 8

What are the biochemical abnormalities implicated in schizophrenia?

Accepted Answer

Increased dopamine and increased serotonin

Answer

Increased dopamine

Answer

Decreased dopamine

Answer

Decreased dopamine and decreased serotonin

Question 9

A 40-year-old woman with a long-standing history of chronic depression states, "My belly and chest are empty. All my organs are gone. I don't exist. I'm dead." What type of delusion is this patient presenting with?

Accepted Answer

Nihilistic delusions

Answer

Paranoid delusions

Answer

Delusions of persecution

Answer

Delusions of reference

Question 10

Which of the following is FALSE regarding schizophrenia?

Accepted Answer

Sustained mood changes

Answer

Third person auditory hallucinations

Answer

Inappropriate emotions

Answer

Formal thought disorder

Psychotic Disorders — MCQs

Psychotic Disorders — MCQs

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