Psychotic Disorders Practice Questions

Q: If both parents are diagnosed with schizophrenia, what is the estimated probability of their offspring developing the condition?

40%. **Explanation:** The risk of developing schizophrenia is heavily influenced by genetic factors. In the general population, the lifetime prevalence is approximately **1%**. However, this risk increases significantly as the degree of genetic relatedness to an affected individual increases. When **both parents** have schizophrenia, the risk to the offspring is approximately **40% to 46%**. This represents the highest risk among all familial categories, second only to monozygotic (identical) twins. In the context of standard medical examinations like NEET-PG, **40%** is the most commonly cited and accepted figure based on Kallmann’s landmark studies and Kaplan & Sadock’s Synopsis of Psychiatry. **Analysis of Options:** * **A (4%):** This is the approximate risk for a second-degree relative (e.g., a grandchild or nephew/niece) of an individual with schizophrenia. * **B (14%):** This is the approximate risk when only **one parent** or one non-twin sibling is affected (ranging from 10% to 15%). * **D (50%):** While 40-46% is close to 50%, the latter is generally reserved for the risk in **Monozygotic twins (47-50%)**. A child of two affected parents has a slightly lower risk than an identical twin because the twin shares 100% of the DNA and a more similar intrauterine environment. **High-Yield Clinical Pearls for NEET-PG:** * **General Population:** 1% * **One Parent affected:** 12–15% * **Dizygotic (Fraternal) Twins:** 12–15% (same as a sibling) * **Both Parents affected:** 40–46% * **Monozygotic (Identical) Twins:** 47–50% * **Note:** Schizophrenia is a **polygenic** disorder; no single gene is responsible. The most common environmental risk factor cited is cannabis use or obstetric complications.

Q: Which of the following is a delusion?

Othello syndrome. **Explanation:** The correct answer is **Othello syndrome**. In psychiatry, a **delusion** is defined as a fixed, false belief that is out of keeping with the patient’s social and cultural background and is held with absolute conviction despite evidence to the contrary. **1. Why Othello Syndrome is correct:** Othello syndrome, also known as **Morbid Jealousy** or Conjugal Paranoia, is a type of delusional disorder where the individual is unshakably convinced that their spouse or sexual partner is being unfaithful. This belief is maintained without any objective evidence and often leads to dangerous behaviors like stalking or violence. **2. Analysis of other options:** * **De Clerambault's syndrome:** Also known as **Erotomania**, this is a delusional disorder where the patient believes that another person (usually of higher social status or a celebrity) is in love with them. While this is also a delusion, the question asks "Which of the following is a delusion?" and in many standardized NEET-PG keys, Othello syndrome is the primary example used for "Delusional Disorder—Jealous type." *Note: In some contexts, both A and B are delusions; however, if forced to choose the "most" classic example in older MCQ patterns, Othello is frequently cited.* * **Pyromania:** This is an **Impulse Control Disorder**, not a delusion. It involves a repetitive failure to resist impulses to set fires, accompanied by tension before the act and relief/gratification afterward. **High-Yield Clinical Pearls for NEET-PG:** * **Capgras Syndrome:** Delusion of doubles (believing a familiar person has been replaced by an identical impostor). * **Fregoli Syndrome:** Delusion that different people are actually a single person in disguise. * **Ekbom Syndrome:** Delusional parasitosis (belief that one is infested with insects). * **Cotard Syndrome:** Nihilistic delusion (belief that one is dead, rotting, or does not exist).

Q: A young patient admitted to the hospital with acute psychosis believes his wife, who is present in the room, is a nurse masquerading as her. He states that this nurse previously gave him the wrong medication and now intends to harm him. What is the likely diagnosis?

Capgras syndrome. ### Explanation **1. Why Capgras Syndrome is Correct:** Capgras syndrome is a **delusional misidentification syndrome** characterized by the belief that a person familiar to the patient (usually a spouse or close relative) has been replaced by an **identical-looking impostor**. In this case, the patient recognizes his wife's physical appearance but denies her true identity, claiming she is a nurse "masquerading" as her. This often stems from a disconnection between the facial recognition area of the brain and the emotional processing center (amygdala), leading to a lack of "emotional warmth" upon seeing a loved one. **2. Analysis of Incorrect Options:** * **Fregoli Syndrome:** This is the "inverse" of Capgras. The patient believes that different strangers are actually a single familiar person in disguise. * **Delusion of Subjective Doubles:** The patient believes there is an exact physical double of *themselves* living an independent life. * **Othello Syndrome:** Also known as pathological jealousy, it is the delusional belief that one’s partner is being unfaithful, without any evidence. **3. High-Yield Clinical Pearls for NEET-PG:** * **Capgras Syndrome** is the most common delusional misidentification syndrome. * It is frequently associated with **Schizophrenia**, but can also occur in organic brain disorders like **Lewy Body Dementia** or right-hemisphere lesions. * **Key distinction:** In Capgras, the person looks the same but is a "stranger"; in Fregoli, the person looks like a stranger but is "familiar." * These syndromes are often categorized under **Monothematic Delusions**.

Q: Delusions are seen in all the following conditions except:

Obsessive compulsive disorder. **Explanation:** The core distinction in this question lies in the nature of thought content and the preservation of **insight**. **1. Why Obsessive-Compulsive Disorder (OCD) is the correct answer:** By definition, OCD is characterized by **obsessions**, which are recurrent, intrusive thoughts recognized by the patient as their own (ego-dystonic). A hallmark of OCD is that the patient typically retains **insight**, recognizing these thoughts as irrational or excessive. In contrast, a **delusion** is a fixed, false belief held with absolute certainty despite evidence to the contrary, representing a loss of insight. While "OCD with poor insight" exists, the classic definition of OCD excludes delusions. **2. Analysis of Incorrect Options:** * **Schizophrenia:** Delusions are a primary "positive symptom" and a diagnostic criterion for Schizophrenia. They are typically bizarre or non-bizarre and held with no insight. * **Mania:** In Bipolar Disorder (Manic episode), patients often exhibit **mood-congruent delusions**, such as delusions of grandeur (e.g., believing they have special powers or wealth). * **Depression:** In Severe Depressive Episodes with Psychotic Features, patients may experience **mood-congruent delusions**, such as delusions of guilt, poverty, or nihilistic delusions (Cotard’s syndrome). **Clinical Pearls for NEET-PG:** * **Overvalued Ideas:** These occupy a middle ground between obsessions and delusions; they are unreasonable beliefs but not held with the same "fixed" intensity as a delusion. * **Ego-dystonic vs. Ego-syntonic:** Obsessions are ego-dystonic (unpleasant/alien), whereas delusions are ego-syntonic (the patient believes them to be true/part of their reality). * **Insight Scale:** Insight is usually preserved in Neuroses (OCD, Anxiety) and lost in Psychoses (Schizophrenia, Mania).

Q: Which of the following is the most specific indicator of psychosis?

Neologism. **Explanation:** The correct answer is **A. Neologism**. In psychiatry, **Neologism** refers to the coining of new words or the use of existing words in a completely private, idiosyncratic manner that has no recognized meaning to others. It is a hallmark of a **formal thought disorder** and is considered a "first-rank" or highly specific indicator of **Schizophrenia** and other psychotic disorders. While other speech disturbances occur in various conditions, neologisms are rarely seen outside of psychosis. **Analysis of Incorrect Options:** * **B. Incoherence (Word Salad):** While common in severe schizophrenia (disorganized type), it can also be seen in organic brain syndromes, delirium, or advanced dementia. It is less specific to primary psychosis than neologisms. * **C. Pressure of speech:** This is a characteristic feature of **Mania** (Bipolar Disorder). It refers to rapid, frantic, and unstoppable speech. While it can occur in psychotic mania, it is primarily a sign of psychomotor agitation rather than a specific indicator of psychosis itself. * **D. Perseveration:** This is the persistent repetition of a specific response (word, phrase, or gesture) despite the absence or cessation of a stimulus. It is most commonly associated with **organic brain diseases** (like frontal lobe damage) and dementias, making it non-specific for psychosis. **Clinical Pearls for NEET-PG:** * **Formal Thought Disorder (FTD):** Neologisms, Derailment (Knight’s move thinking), and Loosening of Associations are the most characteristic FTDs in Schizophrenia. * **Clang Association:** Choosing words based on sound (rhyming) rather than meaning; typically seen in Mania. * **Echolalia:** Senseless repetition of another person’s words; seen in Catatonia, Autism, and Dementia.

Q: A person believes that a machine is being implanted on their head by others. This is an example of:

Bizarre delusions. **Explanation:** The correct answer is **A. Bizarre delusions**. A **delusion** is a fixed, false belief that is firmly held despite incontrovertible evidence to the contrary and is not in keeping with the patient’s cultural or educational background. * **Bizarre delusions** are characterized by beliefs that are clearly implausible, not understandable to same-culture peers, and do not derive from ordinary life experiences. The idea of a machine being implanted in one's head by others is physically impossible and lacks any logical basis in reality, making it "bizarre." This is a hallmark feature often associated with **Schizophrenia**. **Analysis of Incorrect Options:** * **B. Non-bizarre delusions:** These involve situations that could potentially occur in real life, such as being followed, poisoned, or loved by a stranger (e.g., Delusional Disorder). While false, they are physically possible. * **C. Hallucinations:** These are sensory perceptions in the absence of an external stimulus (e.g., hearing voices when no one is speaking). The question describes a *belief* (thought content), not a sensory experience. * **D. Illusions:** These are misinterpretations of a real external stimulus (e.g., mistaking a rope for a snake in the dark). **Clinical Pearls for NEET-PG:** * **Schneiderian First Rank Symptoms (FRS):** Bizarre delusions (specifically delusions of control, influence, or passivity) are key components of Schneider’s FRS for Schizophrenia. * **Delusion of Passivity:** If the patient believes their actions or thoughts are being controlled by the implanted machine, it is specifically termed a "passivity phenomenon." * **Key Distinction:** The primary difference between bizarre and non-bizarre delusions is **physical possibility**. If it *could* happen (even if unlikely), it is non-bizarre.

Q: What is an oneiroid state?

A dream-like state. **Explanation:** The term **Oneiroid state** (derived from the Greek word *oneiros*, meaning "dream") refers to a specific type of altered consciousness characterized by a **dream-like state** occurring while the patient is awake. 1. **Why Option B is correct:** In an oneiroid state, the patient experiences vivid, often kaleidoscopic hallucinations and scenic imagery, feeling as though they are living within a dream or a cinematic experience. Unlike typical delirium, the patient is often physically quiet but deeply immersed in an internal fantasy world. It is most commonly associated with **Oneiroid Schizophrenia**. 2. **Why the other options are incorrect:** * **Option A (Twilight state):** This is a condition of narrowed consciousness (often seen in epilepsy or hysteria) where the patient may perform complex actions but has subsequent amnesia. While similar, it lacks the specific "dream-like" hallucinatory depth of oneirophrenia. * **Option C (Heightened consciousness):** This refers to hyper-alertness, often seen in mania or under the influence of stimulants, which is the opposite of the clouded, dream-like immersion seen here. * **Option D (Organic stupor):** This involves a lack of psychomotor activity and responsiveness due to structural or metabolic brain damage, whereas the oneiroid state is primarily a functional psychotic phenomenon. **High-Yield Clinical Pearls for NEET-PG:** * **Mayer-Gross** is the psychiatrist associated with the description of the oneiroid state. * It is a key feature of **Oneirophrenia**, a sub-type of acute schizophrenia with a relatively good prognosis. * **Key distinction:** Unlike delirium (where disorientation is to the external environment), the oneiroid patient is disoriented because they are "lost" in an internal dream world.

Q: Schizophrenia is characterized by all the following positive symptoms, except:

Anhedonia. **Explanation:** In Schizophrenia, symptoms are broadly categorized into **Positive** and **Negative** symptoms. This distinction is crucial for both diagnosis and pharmacological management. **Why Anhedonia is the correct answer:** **Anhedonia** (the inability to experience pleasure from activities usually found enjoyable) is a classic **Negative symptom**. Negative symptoms represent a "loss" or "deficit" of normal functions. They are often more resistant to typical antipsychotics and are associated with a poorer long-term prognosis. Other negative symptoms include the "5 A’s": Affective flattening, Alogia (poverty of speech), Avolition (lack of motivation), Asociality, and Anhedonia. **Why the other options are incorrect:** Positive symptoms represent an "excess" or "distortion" of normal functions. * **A. Hallucinations:** These are sensory perceptions in the absence of external stimuli (most commonly auditory in Schizophrenia). * **B. Delusions:** These are fixed, false beliefs that are not amenable to change in light of conflicting evidence. * **C. Conceptual Disorganization:** This refers to thought disorder manifested through disorganized speech (e.g., derailment, incoherence, or tangentiality). **High-Yield Clinical Pearls for NEET-PG:** * **Schneider’s First Rank Symptoms (FRS):** Primarily consist of positive symptoms (e.g., audible thoughts, somatic passivity, delusional perception). * **Dopamine Hypothesis:** Positive symptoms are associated with **hyperactivity** of dopamine in the **mesolimbic pathway**, while negative symptoms are linked to **hypoactivity** in the **mesocortical pathway**. * **Prognosis:** Presence of prominent positive symptoms generally predicts a better response to treatment compared to predominant negative symptoms.

Q: Delusion is not seen in which of the following conditions?

Anxiety. **Explanation:** The core of this question lies in distinguishing between **Psychotic symptoms** (loss of contact with reality) and **Neurotic symptoms** (reality testing remains intact). **Why Anxiety is the Correct Answer:** Anxiety disorders (such as GAD, Panic Disorder, or Phobias) are classified as **neurotic disorders**. In these conditions, the patient’s reality testing is preserved. While a patient may experience irrational fears or intrusive thoughts, they do not harbor **Delusions** (fixed, false beliefs unshakeable by logic and out of keeping with the patient’s cultural background). If a patient with anxiety develops delusions, the diagnosis must be re-evaluated toward a psychotic spectrum or mood disorder. **Why the Other Options are Incorrect:** * **Schizophrenia:** This is the prototypical psychotic disorder. Delusions (especially persecutory, reference, or delusions of control) are a **Schneiderian First Rank Symptom** and a core diagnostic criterion. * **Mania:** In Bipolar Disorder, patients often exhibit **Mood-congruent delusions**, most commonly **Delusions of Grandeur** (believing they have special powers, wealth, or a divine identity). * **Depression:** Severe depression can present with **Psychotic Depression**. These patients experience mood-congruent delusions such as **Delusions of Guilt, Poverty, or Nihilistic delusions** (Cotard’s syndrome). **Clinical Pearls for NEET-PG:** * **Reality Testing:** Intact in Neurosis (Anxiety, OCD); Impaired in Psychosis (Schizophrenia, Mania). * **Cotard’s Syndrome:** A specific nihilistic delusion (belief that one is dead or body parts are rotting) seen in severe depression. * **Primary vs. Secondary Delusions:** Primary delusions (Autochthonous) are diagnostic of Schizophrenia; secondary delusions are derived from underlying mood states (Mania/Depression).

Question 1

If both parents are diagnosed with schizophrenia, what is the estimated probability of their offspring developing the condition?

Accepted Answer

40%

Answer

4%

Answer

14%

Answer

50%

Question 2

Which of the following is a delusion?

Accepted Answer

Othello syndrome

Answer

De Clerambault's syndrome

Answer

Pyromania

Answer

None of the above

Question 3

A young patient admitted to the hospital with acute psychosis believes his wife, who is present in the room, is a nurse masquerading as her. He states that this nurse previously gave him the wrong medication and now intends to harm him. What is the likely diagnosis?

Accepted Answer

Capgras syndrome

Answer

Fregoli syndrome

Answer

Delusion of subjective doubles

Answer

Othello syndrome

Question 4

Delusions are seen in all the following conditions except:

Accepted Answer

Obsessive compulsive disorder

Answer

Depression

Answer

Mania

Answer

Schizophrenia

Question 5

Marital discord is a known factor in the development of which of the following disorders?

Accepted Answer

Schizophrenia

Answer

Conduct disorder

Answer

Depression

Answer

Delusional disorder

Question 6

Which of the following is the most specific indicator of psychosis?

Accepted Answer

Neologism

Answer

Incoherence

Answer

Pressure of speech

Answer

Perseveration

Question 7

A person believes that a machine is being implanted on their head by others. This is an example of:

Accepted Answer

Bizarre delusions

Answer

Non-bizarre delusions

Answer

Hallucinations

Answer

Illusions

Question 8

What is an oneiroid state?

Accepted Answer

A dream-like state

Answer

A twilight state

Answer

A heightened state of consciousness

Answer

An organic stupor or torpor

Question 9

Schizophrenia is characterized by all the following positive symptoms, except:

Accepted Answer

Anhedonia

Answer

Hallucinations

Answer

Delusions

Answer

Conceptual disorganization

Question 10

Delusion is not seen in which of the following conditions?

Accepted Answer

Anxiety

Answer

Depression

Answer

Schizophrenia

Answer

Mania

Psychotic Disorders — MCQs

Psychotic Disorders — MCQs

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