Mood Disorders — MCQs

Q: In depression, there is a deficiency in which neurotransmitter?

5-HT (Serotonin). ### Explanation **Correct Option: A. 5-HT (Serotonin)** The pathophysiology of depression is primarily explained by the **Monoamine Hypothesis**, which suggests that a deficiency in monoamine neurotransmitters—specifically **Serotonin (5-HT)** and **Norepinephrine (NE)**—leads to depressive symptoms. Serotonin is crucial for regulating mood, sleep, appetite, and impulse control. Most first-line antidepressants, such as SSRIs (Selective Serotonin Reuptake Inhibitors), work by increasing the synaptic concentration of 5-HT, reinforcing its central role in the disorder. **Incorrect Options:** * **B. Acetylcholine (Ach):** Increased cholinergic activity is sometimes associated with depression, while decreased levels are linked to cognitive deficits (e.g., Alzheimer’s). It is not the primary deficiency in depression. * **C. Dopamine:** While dopamine deficiency is linked to **anhedonia** (loss of pleasure) and is central to Parkinson’s disease, serotonin remains the hallmark neurotransmitter associated with the core diagnosis of Major Depressive Disorder (MDD). * **D. GABA:** GABA is the primary inhibitory neurotransmitter. Its deficiency is more classically associated with **Anxiety Disorders** and seizure activity rather than the primary etiology of depression. **Clinical Pearls for NEET-PG:** * **Metabolite Marker:** The primary metabolite of Serotonin is **5-HIAA** (5-Hydroxyindoleacetic acid). Low levels of 5-HIAA in the cerebrospinal fluid (CSF) are strongly associated with **impulsive suicide attempts**. * **Neuroendocrine Change:** Depression is often associated with **Hypercortisolism** (failure to suppress cortisol in the Dexamethasone Suppression Test). * **Sleep Changes:** High-yield findings in depression include **decreased REM latency** (REM sleep starts sooner) and increased REM intensity.

Q: A 17-year-old boy is diagnosed with schizophrenia. What is the risk that one of his siblings will develop the disease?

9%. **Explanation:** The risk of developing schizophrenia is heavily influenced by genetic proximity. In the field of psychiatric genetics, the risk increases as the percentage of shared genes with an affected individual increases. **1. Why 9% is Correct:** For a sibling of an affected individual (who shares approximately 50% of their genes), the lifetime risk of developing schizophrenia is approximately **8–10%** (standardized at **9%** for examination purposes). This is nearly 10 times higher than the risk in the general population. **2. Analysis of Incorrect Options:** * **A (2%):** This is too low for a first-degree relative. However, the risk for a **second-degree relative** (uncles, aunts, nephews, nieces) is approximately **2–3%**. * **B (5%):** This is an intermediate value but does not align with established epidemiological data for siblings. It is closer to the risk for a parent (approx. 6%). * **D (20%):** This is too high for a single sibling. This value is more representative of the risk when **both parents** have schizophrenia (approx. 40%) or for a **dizygotic (fraternal) twin** of an affected individual (approx. 12–17%). **Clinical Pearls & High-Yield Facts for NEET-PG:** * **General Population Risk:** 1% (Baseline). * **Monozygotic (Identical) Twin:** ~47–50% (Highest risk; proves it is not 100% genetic). * **Dizygotic (Fraternal) Twin:** ~12–17%. * **Child of one affected parent:** ~12–13%. * **Child of two affected parents:** ~40–46%. * **Sibling of affected individual:** ~8–10% (9%). **Key Concept:** Schizophrenia is a **polygenic** disorder. The more closely related a person is to a patient, the higher the risk, with the highest concordance seen in monozygotic twins.

Q: An 18-year-old student complains of a lack of interest in studies for the last 6 months. He has frequent quarrels with his parents and experiences frequent headaches. What is the most appropriate clinical approach?

Rule out depression.. **Explanation:** The correct answer is **Rule out depression (Option B)**. In adolescents, depression often presents atypically compared to adults. While adults typically manifest "low mood" or sadness, adolescents frequently present with **irritable mood**, behavioral issues (quarrels with parents), and **somatic complaints** (frequent headaches). The patient’s "lack of interest in studies" for 6 months signifies **anhedonia** or a decline in socio-occupational functioning, which are core diagnostic criteria for Depressive Disorder under DSM-5 and ICD-11. **Why other options are incorrect:** * **Option A:** Attributing a 6-month decline in functioning and persistent somatic symptoms to "normal adolescent behavior" is a common clinical error. Any significant change in baseline behavior warrants a pathological workup. * **Option C:** While he has headaches, the presence of behavioral changes and academic decline suggests the headache is likely a somatic manifestation of an underlying psychiatric condition rather than a primary neurological disorder like migraine. * **Option D:** Oppositional Defiant Disorder (ODD) involves a pattern of angry/irritable mood and vindictiveness, but it does not typically explain the "lack of interest in studies" or the somatic symptoms as effectively as depression does. **Clinical Pearls for NEET-PG:** * **Atypical Presentation:** Irritability and somatic symptoms (headache, stomach ache) are the hallmarks of pediatric and adolescent depression. * **Duration:** For a diagnosis of Major Depressive Disorder, symptoms must persist for at least **2 weeks**. This patient has been symptomatic for 6 months. * **Pseudodementia:** In elderly patients, depression often mimics dementia; in adolescents, it often mimics "laziness" or "rebellion." Always screen for mood symptoms in cases of sudden academic decline.

Q: All of the following are features of mania except?

Decreased motor activity. **Explanation:** The correct answer is **D. Decreased motor activity**. Mania is a clinical syndrome characterized by a distinct period of abnormally elevated, expansive, or irritable mood and increased energy. **Why D is correct:** In mania, there is a characteristic **increase in psychomotor activity**. Patients are often restless, over-energetic, and may engage in excessive goal-directed activities (e.g., social, professional, or sexual). "Decreased motor activity" (psychomotor retardation) is instead a hallmark feature of **Depressive episodes**, not mania. **Why other options are incorrect:** * **A. Decreased need for sleep:** This is a classic diagnostic criterion. Unlike insomnia (where the person wants to sleep but can’t), a manic patient feels refreshed and energetic after only 2–3 hours of sleep or none at all. * **B. Elated mood:** Elation (a feeling of "being on top of the world") is the core emotional feature of mania. It can progress from euphoria to exaltation and ecstasy. * **C. Delusion of grandeur:** This is a common psychotic feature in mania where the patient believes they possess special powers, wealth, or a relationship with a famous person/deity. **High-Yield Clinical Pearls for NEET-PG:** * **DIG FAST Mnemonic** for Mania: **D**istractibility, **I**ndiscretion (excessive pleasure seeking), **G**randiosity, **F**light of ideas, **A**ctivity increase, **S**leep (decreased need), **T**alkativeness (pressure of speech). * **Duration:** Symptoms must last at least **1 week** for Mania (DSM-5) and **4 days** for Hypomania. * **Drug of Choice:** **Lithium** is the gold standard for prophylaxis and acute mania, though atypical antipsychotics are often used for rapid control of agitation.

Q: In depression, there is a deficiency of which neurotransmitter?

Serotonin (5-HT). **Explanation:** The correct answer is **Serotonin (5-HT)**. This is based on the **Monoamine Hypothesis of Depression**, which posits that depressive symptoms result from a functional deficiency of monoamine neurotransmitters, primarily serotonin and norepinephrine, in the synaptic cleft. Serotonin is crucial for regulating mood, sleep, appetite, and emotional stability. Most first-line antidepressants, such as SSRIs (Selective Serotonin Reuptake Inhibitors), work by increasing the availability of serotonin in the brain. **Analysis of Incorrect Options:** * **Acetlycholine:** Increased levels of acetylcholine are sometimes associated with depression (Cholinergic-Aminergic Imbalance Theory), while deficiencies are typically linked to cognitive decline and Alzheimer’s disease. * **Dopamine:** While dopamine is involved in the brain's reward system and its deficiency can lead to **anhedonia** (inability to feel pleasure), serotonin remains the primary neurotransmitter cited in the core pathophysiology of clinical depression. * **GABA:** This is the primary inhibitory neurotransmitter. Deficiencies are more commonly associated with **Anxiety Disorders** and seizure activity rather than being the primary cause of depression. **High-Yield Clinical Pearls for NEET-PG:** * **Metabolite Check:** The major metabolite of Serotonin is **5-HIAA** (5-Hydroxyindoleacetic acid). Low levels of 5-HIAA in the CSF are strongly associated with **impulsive behavior and violent suicide attempts**. * **Neuroendocrine findings:** Depression is often associated with **hypercortisolemia** (failure to suppress cortisol in the Dexamethasone Suppression Test). * **Sleep Changes:** Characteristic findings include **decreased REM latency** (entering REM sleep faster) and increased REM density.

Q: A 40-year-old woman is being evaluated and is noted to have a decreased latency of REM sleep. Which disorder is she most likely suffering from?

Major depression. ### Explanation The correct answer is **Major Depressive Disorder (MDD)**. **Understanding REM Latency** REM latency is the interval between falling asleep and the first episode of REM (Rapid Eye Movement) sleep. In a healthy adult, this typically takes about 90 minutes. **Decreased REM latency** (entering REM sleep sooner than normal) is a hallmark polysomnographic finding in Major Depression. **Why Major Depression is Correct:** In patients with MDD, the architecture of sleep is significantly altered. Key findings include: * **Decreased REM Latency:** The most characteristic finding. * **Increased REM Duration:** The first REM period is longer. * **Increased REM Density:** More frequent eye movements during REM. * **Reduced Slow-Wave Sleep (N3):** Deep sleep is diminished. * **Early Morning Awakening:** Terminal insomnia. **Analysis of Incorrect Options:** * **Schizophrenia:** While sleep disturbances (like insomnia) occur, decreased REM latency is not a diagnostic or characteristic feature. * **PTSD:** Patients often experience nightmares and fragmented sleep, but the specific finding of shortened REM latency is not the primary physiological marker. * **Obsessive-Compulsive Disorder (OCD):** Sleep patterns in OCD are generally non-specific and do not consistently show the shortened REM latency seen in mood disorders. **High-Yield Clinical Pearls for NEET-PG:** * **Biological Markers of MDD:** Along with decreased REM latency, look for **increased cortisol levels** (due to HPA axis hyperactivity) and a **positive Dexamethasone Suppression Test** (failure to suppress cortisol). * **Antidepressant Effect:** Most antidepressants (especially SSRIs and TCAs) **increase REM latency** and decrease total REM sleep, which is thought to contribute to their therapeutic effect. * **Cholinergic-Aminergic Balance:** Depression is associated with an overactive cholinergic system, which triggers REM sleep earlier.

Mood Disorders Indian Medical PG Practice Questions and MCQs

Question 1: All of the following are tricyclic antidepressants except?

A. Mianserin (Correct Answer)
B. Imipramine
C. Protriptyline
D. Maprotiline

Explanation: **Explanation:** The correct answer is **A. Mianserin**. **Why Mianserin is the correct answer:** Mianserin is classified as a **Tetracyclic Antidepressant (TeCA)**, not a Tricyclic Antidepressant (TCA). Chemically, it contains four fused rings. Pharmacologically, it acts as an alpha-2 adrenergic receptor antagonist and a serotonin receptor antagonist (NASSA—Noradrenergic and Specific Serotonergic Antidepressant). Unlike TCAs, it lacks significant anticholinergic side effects and is relatively safer in overdose. **Analysis of Incorrect Options:** * **B. Imipramine:** This is the prototypical **Tricyclic Antidepressant**. It is a tertiary amine that inhibits the reuptake of both serotonin and norepinephrine. It is historically significant as the first antidepressant discovered. * **C. Protriptyline:** This is a **Secondary Amine TCA**. It is unique among TCAs because it is more activating/stimulating rather than sedating, making it useful for patients with lethargy. * **D. Maprotiline:** While Maprotiline is technically a tetracyclic compound (like Mianserin), in the context of standard medical examinations and the NEET-PG curriculum, it is traditionally grouped with **TCAs** (specifically as a secondary amine-like drug) because its side effect profile and mechanism (potent Norepinephrine Reuptake Inhibition) closely mimic TCAs. However, between Mianserin and Maprotiline, Mianserin is the definitive "non-TCA" due to its unique NASSA mechanism. **High-Yield Clinical Pearls for NEET-PG:** * **DOC for Enuresis:** Imipramine is the drug of choice for nocturnal enuresis in children (though behavioral therapy is first-line). * **OCD Treatment:** Clomipramine is the most serotonin-selective TCA and is highly effective for OCD. * **Toxicity:** TCA overdose presents with the **3 C's**: Coma, Convulsions, and Cardiac arrhythmias (due to sodium channel blockade). The antidote is **Sodium Bicarbonate**. * **Amitriptyline:** The most sedating TCA, often used for chronic pain and migraine prophylaxis.

Question 2: In depression, there is a deficiency in which neurotransmitter?

A. 5-HT (Serotonin) (Correct Answer)
B. Acetylcholine (Ach)
C. Dopamine
D. GABA (Gamma-aminobutyric acid)

Explanation: ### Explanation **Correct Option: A. 5-HT (Serotonin)** The pathophysiology of depression is primarily explained by the **Monoamine Hypothesis**, which suggests that a deficiency in monoamine neurotransmitters—specifically **Serotonin (5-HT)** and **Norepinephrine (NE)**—leads to depressive symptoms. Serotonin is crucial for regulating mood, sleep, appetite, and impulse control. Most first-line antidepressants, such as SSRIs (Selective Serotonin Reuptake Inhibitors), work by increasing the synaptic concentration of 5-HT, reinforcing its central role in the disorder. **Incorrect Options:** * **B. Acetylcholine (Ach):** Increased cholinergic activity is sometimes associated with depression, while decreased levels are linked to cognitive deficits (e.g., Alzheimer’s). It is not the primary deficiency in depression. * **C. Dopamine:** While dopamine deficiency is linked to **anhedonia** (loss of pleasure) and is central to Parkinson’s disease, serotonin remains the hallmark neurotransmitter associated with the core diagnosis of Major Depressive Disorder (MDD). * **D. GABA:** GABA is the primary inhibitory neurotransmitter. Its deficiency is more classically associated with **Anxiety Disorders** and seizure activity rather than the primary etiology of depression. **Clinical Pearls for NEET-PG:** * **Metabolite Marker:** The primary metabolite of Serotonin is **5-HIAA** (5-Hydroxyindoleacetic acid). Low levels of 5-HIAA in the cerebrospinal fluid (CSF) are strongly associated with **impulsive suicide attempts**. * **Neuroendocrine Change:** Depression is often associated with **Hypercortisolism** (failure to suppress cortisol in the Dexamethasone Suppression Test). * **Sleep Changes:** High-yield findings in depression include **decreased REM latency** (REM sleep starts sooner) and increased REM intensity.

Question 3: A 17-year-old boy is diagnosed with schizophrenia. What is the risk that one of his siblings will develop the disease?

A. 2%
B. 5%
C. 9% (Correct Answer)
D. 20%

Explanation: **Explanation:** The risk of developing schizophrenia is heavily influenced by genetic proximity. In the field of psychiatric genetics, the risk increases as the percentage of shared genes with an affected individual increases. **1. Why 9% is Correct:** For a sibling of an affected individual (who shares approximately 50% of their genes), the lifetime risk of developing schizophrenia is approximately **8–10%** (standardized at **9%** for examination purposes). This is nearly 10 times higher than the risk in the general population. **2. Analysis of Incorrect Options:** * **A (2%):** This is too low for a first-degree relative. However, the risk for a **second-degree relative** (uncles, aunts, nephews, nieces) is approximately **2–3%**. * **B (5%):** This is an intermediate value but does not align with established epidemiological data for siblings. It is closer to the risk for a parent (approx. 6%). * **D (20%):** This is too high for a single sibling. This value is more representative of the risk when **both parents** have schizophrenia (approx. 40%) or for a **dizygotic (fraternal) twin** of an affected individual (approx. 12–17%). **Clinical Pearls & High-Yield Facts for NEET-PG:** * **General Population Risk:** 1% (Baseline). * **Monozygotic (Identical) Twin:** ~47–50% (Highest risk; proves it is not 100% genetic). * **Dizygotic (Fraternal) Twin:** ~12–17%. * **Child of one affected parent:** ~12–13%. * **Child of two affected parents:** ~40–46%. * **Sibling of affected individual:** ~8–10% (9%). **Key Concept:** Schizophrenia is a **polygenic** disorder. The more closely related a person is to a patient, the higher the risk, with the highest concordance seen in monozygotic twins.

Question 4: An 18-year-old student complains of a lack of interest in studies for the last 6 months. He has frequent quarrels with his parents and experiences frequent headaches. What is the most appropriate clinical approach?

A. Consider it a normal adolescent problem.
B. Rule out depression. (Correct Answer)
C. Rule out migraine.
D. Rule out oppositional defiant disorder.

Explanation: **Explanation:** The correct answer is **Rule out depression (Option B)**. In adolescents, depression often presents atypically compared to adults. While adults typically manifest "low mood" or sadness, adolescents frequently present with **irritable mood**, behavioral issues (quarrels with parents), and **somatic complaints** (frequent headaches). The patient’s "lack of interest in studies" for 6 months signifies **anhedonia** or a decline in socio-occupational functioning, which are core diagnostic criteria for Depressive Disorder under DSM-5 and ICD-11. **Why other options are incorrect:** * **Option A:** Attributing a 6-month decline in functioning and persistent somatic symptoms to "normal adolescent behavior" is a common clinical error. Any significant change in baseline behavior warrants a pathological workup. * **Option C:** While he has headaches, the presence of behavioral changes and academic decline suggests the headache is likely a somatic manifestation of an underlying psychiatric condition rather than a primary neurological disorder like migraine. * **Option D:** Oppositional Defiant Disorder (ODD) involves a pattern of angry/irritable mood and vindictiveness, but it does not typically explain the "lack of interest in studies" or the somatic symptoms as effectively as depression does. **Clinical Pearls for NEET-PG:** * **Atypical Presentation:** Irritability and somatic symptoms (headache, stomach ache) are the hallmarks of pediatric and adolescent depression. * **Duration:** For a diagnosis of Major Depressive Disorder, symptoms must persist for at least **2 weeks**. This patient has been symptomatic for 6 months. * **Pseudodementia:** In elderly patients, depression often mimics dementia; in adolescents, it often mimics "laziness" or "rebellion." Always screen for mood symptoms in cases of sudden academic decline.

Question 5: All of the following are features of mania except?

A. Decreased need for sleep
B. Elated mood
C. Delusion of grandeur
D. Decreased motor activity (Correct Answer)

Explanation: **Explanation:** The correct answer is **D. Decreased motor activity**. Mania is a clinical syndrome characterized by a distinct period of abnormally elevated, expansive, or irritable mood and increased energy. **Why D is correct:** In mania, there is a characteristic **increase in psychomotor activity**. Patients are often restless, over-energetic, and may engage in excessive goal-directed activities (e.g., social, professional, or sexual). "Decreased motor activity" (psychomotor retardation) is instead a hallmark feature of **Depressive episodes**, not mania. **Why other options are incorrect:** * **A. Decreased need for sleep:** This is a classic diagnostic criterion. Unlike insomnia (where the person wants to sleep but can’t), a manic patient feels refreshed and energetic after only 2–3 hours of sleep or none at all. * **B. Elated mood:** Elation (a feeling of "being on top of the world") is the core emotional feature of mania. It can progress from euphoria to exaltation and ecstasy. * **C. Delusion of grandeur:** This is a common psychotic feature in mania where the patient believes they possess special powers, wealth, or a relationship with a famous person/deity. **High-Yield Clinical Pearls for NEET-PG:** * **DIG FAST Mnemonic** for Mania: **D**istractibility, **I**ndiscretion (excessive pleasure seeking), **G**randiosity, **F**light of ideas, **A**ctivity increase, **S**leep (decreased need), **T**alkativeness (pressure of speech). * **Duration:** Symptoms must last at least **1 week** for Mania (DSM-5) and **4 days** for Hypomania. * **Drug of Choice:** **Lithium** is the gold standard for prophylaxis and acute mania, though atypical antipsychotics are often used for rapid control of agitation.

Question 6: What is the treatment of choice for endogenous depression with suicidal tendencies?

A. Lithium
B. Chlorpromazine
C. Electroconvulsive Therapy (ECT) (Correct Answer)
D. Psychoanalysis

Explanation: ### Explanation **Correct Answer: C. Electroconvulsive Therapy (ECT)** **Why ECT is the Correct Choice:** In psychiatry, the presence of **suicidal tendencies** or active suicidal ideation in a patient with Severe Depression (Endogenous Depression) constitutes a psychiatric emergency. While antidepressants are effective, they typically have a "therapeutic lag" of 2–4 weeks before showing significant clinical improvement. **ECT is the treatment of choice** because it provides the **most rapid clinical response**, effectively reducing the immediate risk of self-harm. It is also the gold-standard treatment for depression with psychotic features or catatonia. **Analysis of Incorrect Options:** * **A. Lithium:** Primarily used as a mood stabilizer for Bipolar Disorder and for prophylaxis. While it has long-term anti-suicidal properties, it is not the first-line acute treatment for a suicidal depressive episode due to its slow onset and narrow therapeutic index. * **B. Chlorpromazine:** This is a typical antipsychotic. While it may provide sedation, it has no primary role in treating endogenous depression and can sometimes worsen depressive symptoms. * **D. Psychoanalysis:** This is a long-term "insight-oriented" psychotherapy. It is strictly contraindicated in acute, severe, or suicidal depression as the patient lacks the cognitive energy to engage, and the process is too slow to address an emergency. **NEET-PG High-Yield Pearls:** * **Absolute Contraindication for ECT:** There are no absolute contraindications, but **Increased Intracranial Pressure (ICP)** is the most important relative contraindication. * **Most Common Side Effect of ECT:** Retrograde and anterograde amnesia (transient). * **Mortality Risk:** The risk of death with ECT is extremely low (approx. 0.01%), similar to that of general anesthesia. * **Electrode Placement:** Bilateral ECT is more effective but has more cognitive side effects; Unilateral (d'Elia placement) has fewer side effects.

Question 7: In depression, there is a deficiency of which neurotransmitter?

A. Serotonin (5-HT) (Correct Answer)
B. Acetylcholine
C. Dopamine
D. GABA

Explanation: **Explanation:** The correct answer is **Serotonin (5-HT)**. This is based on the **Monoamine Hypothesis of Depression**, which posits that depressive symptoms result from a functional deficiency of monoamine neurotransmitters, primarily serotonin and norepinephrine, in the synaptic cleft. Serotonin is crucial for regulating mood, sleep, appetite, and emotional stability. Most first-line antidepressants, such as SSRIs (Selective Serotonin Reuptake Inhibitors), work by increasing the availability of serotonin in the brain. **Analysis of Incorrect Options:** * **Acetlycholine:** Increased levels of acetylcholine are sometimes associated with depression (Cholinergic-Aminergic Imbalance Theory), while deficiencies are typically linked to cognitive decline and Alzheimer’s disease. * **Dopamine:** While dopamine is involved in the brain's reward system and its deficiency can lead to **anhedonia** (inability to feel pleasure), serotonin remains the primary neurotransmitter cited in the core pathophysiology of clinical depression. * **GABA:** This is the primary inhibitory neurotransmitter. Deficiencies are more commonly associated with **Anxiety Disorders** and seizure activity rather than being the primary cause of depression. **High-Yield Clinical Pearls for NEET-PG:** * **Metabolite Check:** The major metabolite of Serotonin is **5-HIAA** (5-Hydroxyindoleacetic acid). Low levels of 5-HIAA in the CSF are strongly associated with **impulsive behavior and violent suicide attempts**. * **Neuroendocrine findings:** Depression is often associated with **hypercortisolemia** (failure to suppress cortisol in the Dexamethasone Suppression Test). * **Sleep Changes:** Characteristic findings include **decreased REM latency** (entering REM sleep faster) and increased REM density.

Question 8: A 40-year-old woman is being evaluated and is noted to have a decreased latency of REM sleep. Which disorder is she most likely suffering from?

A. Schizophrenia
B. Major depression (Correct Answer)
C. PTSD
D. Obsessive-compulsive disorder

Explanation: ### Explanation The correct answer is **Major Depressive Disorder (MDD)**. **Understanding REM Latency** REM latency is the interval between falling asleep and the first episode of REM (Rapid Eye Movement) sleep. In a healthy adult, this typically takes about 90 minutes. **Decreased REM latency** (entering REM sleep sooner than normal) is a hallmark polysomnographic finding in Major Depression. **Why Major Depression is Correct:** In patients with MDD, the architecture of sleep is significantly altered. Key findings include: * **Decreased REM Latency:** The most characteristic finding. * **Increased REM Duration:** The first REM period is longer. * **Increased REM Density:** More frequent eye movements during REM. * **Reduced Slow-Wave Sleep (N3):** Deep sleep is diminished. * **Early Morning Awakening:** Terminal insomnia. **Analysis of Incorrect Options:** * **Schizophrenia:** While sleep disturbances (like insomnia) occur, decreased REM latency is not a diagnostic or characteristic feature. * **PTSD:** Patients often experience nightmares and fragmented sleep, but the specific finding of shortened REM latency is not the primary physiological marker. * **Obsessive-Compulsive Disorder (OCD):** Sleep patterns in OCD are generally non-specific and do not consistently show the shortened REM latency seen in mood disorders. **High-Yield Clinical Pearls for NEET-PG:** * **Biological Markers of MDD:** Along with decreased REM latency, look for **increased cortisol levels** (due to HPA axis hyperactivity) and a **positive Dexamethasone Suppression Test** (failure to suppress cortisol). * **Antidepressant Effect:** Most antidepressants (especially SSRIs and TCAs) **increase REM latency** and decrease total REM sleep, which is thought to contribute to their therapeutic effect. * **Cholinergic-Aminergic Balance:** Depression is associated with an overactive cholinergic system, which triggers REM sleep earlier.

Question 9: "La belle indiff everence" is seen in which of the following conditions?

A. Somatization disorder
B. Conversion disorder (Correct Answer)
C. Post-traumatic stress disorder
D. Premature ejaculation

Explanation: **Explanation:** **La belle indifférence** (translated as "beautiful indifference") is a classic clinical sign where a patient displays a striking lack of concern or anxiety regarding a severe physical symptom, such as sudden paralysis or blindness. **1. Why Conversion Disorder is Correct:** In **Conversion Disorder** (Functional Neurological Symptom Disorder), patients present with neurological symptoms (motor or sensory) that cannot be explained by a neurological or medical condition. The symptom is often a symbolic expression of an underlying psychological conflict. *La belle indifférence* occurs because the physical symptom serves to reduce internal anxiety (Primary Gain), leading to an inappropriately calm emotional state despite the perceived disability. **2. Why Other Options are Incorrect:** * **Somatization Disorder:** Now part of Somatic Symptom Disorder, it involves multiple, distressing physical complaints (pain, GI issues) where the patient is typically **highly distressed** and preoccupied with their symptoms, rather than indifferent. * **Post-traumatic Stress Disorder (PTSD):** Characterized by hyperarousal, flashbacks, and intense emotional distress. While emotional numbing can occur, it is distinct from the specific "indifference" toward a physical deficit seen in conversion. * **Premature Ejaculation:** A sexual dysfunction unrelated to the defense mechanisms or neurological presentations of conversion disorder. **3. NEET-PG High-Yield Pearls:** * **Primary Gain:** The internal relief from anxiety by converting a psychological conflict into a physical symptom. * **Secondary Gain:** The external benefits derived from the "sick role" (e.g., attention, avoiding work). * **Identification:** Conversion symptoms often mimic a person the patient knows or has seen. * **Note:** While *la belle indifférence* is a classic textbook association for Conversion Disorder, it is not pathognomonic and is only present in about 30-50% of cases.

Question 10: The period of normalcy is seen between two psychotic episodes. What is the diagnosis?

A. Schizophrenia
B. Manic depressive psychosis (Bipolar disorder) (Correct Answer)
C. Alcoholism
D. Depression

Explanation: ### Explanation **Correct Answer: B. Manic depressive psychosis (Bipolar disorder)** The hallmark of **Manic Depressive Psychosis (MDP)**, now known as Bipolar Disorder, is the **episodic nature** of the illness. Patients experience distinct episodes of mania, hypomania, or depression, separated by periods of **euthymia** (complete normalcy). During these inter-episodic intervals, the patient typically returns to their baseline level of functioning without residual cognitive or social deficits. This "restitution ad integrum" (restoration to the original state) is a classic diagnostic feature that distinguishes it from chronic psychotic disorders. **Why other options are incorrect:** * **A. Schizophrenia:** This is a chronic, deteriorating illness. While it may have exacerbations, there is usually a **residual phase** characterized by negative symptoms (apathy, social withdrawal) and a decline in baseline functioning rather than a return to complete normalcy. * **C. Alcoholism:** This is a substance use disorder characterized by a continuous or compulsive pattern of use. While there may be periods of sobriety, it does not follow the cyclical "psychotic episode followed by normalcy" pattern inherent to primary mood disorders. * **D. Depression:** While Unipolar Depression is episodic, the question specifies "psychotic episodes." While severe depression can have psychotic features, MDP (Bipolar) is the more classic representation of alternating psychotic states (Mania/Depression) with intervening normalcy. **High-Yield Clinical Pearls for NEET-PG:** * **Good Prognostic Factors in Psychosis:** Sudden onset, presence of mood symptoms, and **complete recovery between episodes** (as seen in MDP). * **Kraepelinian Dichotomy:** Emil Kraepelin distinguished "Dementia Praecox" (Schizophrenia) as deteriorating and "Manic Depressive Insanity" as non-deteriorating/periodic. * **Lithium** remains the gold standard for prophylaxis to maintain this period of normalcy in Bipolar patients.

Practice by Chapter

Major Depressive Disorder

Practice Questions

Bipolar Disorder: Manic Episodes

Practice Questions

Bipolar Disorder: Depressive and Mixed Episodes

Practice Questions

Persistent Depressive Disorder (Dysthymia)

Practice Questions

Cyclothymic Disorder

Practice Questions

Seasonal Affective Disorder

Practice Questions

Suicide and Suicidal Behavior

Practice Questions

Pharmacotherapy of Mood Disorders

Practice Questions

Psychotherapy for Mood Disorders

Practice Questions

Brain Stimulation Therapies

Practice Questions

Treatment-Resistant Depression

Practice Questions

Mood Disorders in Special Populations

Practice Questions

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