Neurosurgical Approaches — MCQs
Areas of brain involved in OCD include:
Which of the following will be LEAST useful in treating Obsessive Compulsive Disorder?
A woman comes to psychiatrist with history of spending a lot of time in washing her hands. She is distressed about it but says that she is not able to stop washing. This has started to affect her social life as well. What is the best mode of treatment for her?
Which of the following drugs used for obsessive-compulsive disorder has maximum anticholinergic effect?
A 45-year-old female presents to the OPD with complaints of "feeling tense" and experiencing stomach upset with heartburn and diarrhea. She reports having these symptoms for many years and mentions that her family members also usually feel tense and nervous. Which of the following symptoms is most likely to be seen in this patient?
Psychosurgery is used in which of the following conditions?
Ego's defense mechanism "Undoing" is typically seen in which of the following conditions?
What is true about obsessive-compulsive disorder?
All are true about obsession, except:
All of the following are true about Obsessive compulsive disorder EXCEPT?
Neurosurgical Approaches Indian Medical PG Practice Questions and MCQs
Question 1: Areas of brain involved in OCD include:
- A. Basal ganglia (Correct Answer)
- B. Temporal lobe
- C. All of the options
- D. Cerebellum
Explanation: ***Basal ganglia*** - The **basal ganglia**, particularly the **caudate nucleus**, are a core component of the **cortico-striato-thalamo-cortical (CSTC) circuit**, which is the primary neurobiological model for OCD. - The CSTC circuit involves: **Orbitofrontal cortex → Caudate nucleus → Thalamus → back to cortex**. - Hyperactivity in the **caudate nucleus** is consistently found in OCD patients and correlates with symptom severity. - The basal ganglia's role in **habit formation, motor planning, and behavioral inhibition** directly relates to the compulsive behaviors and ritualistic patterns in OCD. - **Functional neuroimaging** (PET, fMRI) consistently shows increased metabolic activity in the caudate nucleus in OCD patients, which normalizes with successful treatment. *Temporal lobe* - The temporal lobe is **not a primary region** in the classical neurobiology of OCD. - While some studies show volumetric changes, it is not part of the core CSTC circuit. - The primary cortical areas in OCD are the **orbitofrontal cortex and anterior cingulate cortex**, not the temporal lobe. *Cerebellum* - The cerebellum has emerging evidence for involvement in cognitive and affective processing. - However, it is **not a core component** of the established CSTC circuit model for OCD. - Its role appears to be supplementary rather than primary in OCD pathophysiology. *All of the options* - This is incorrect because **temporal lobe is not a primary area** involved in OCD. - The core circuit is the **CSTC loop** involving orbitofrontal cortex, anterior cingulate cortex, basal ganglia (caudate), and thalamus.
Question 2: Which of the following will be LEAST useful in treating Obsessive Compulsive Disorder?
- A. Cognitive behavioral therapy
- B. SSRIs
- C. Clomipramine
- D. Systematic desensitisation (Correct Answer)
Explanation: ***Systematic desensitisation*** - This therapy is primarily used to treat **phobias** and other **anxiety disorders** where avoidance is a key feature and a clear, single trigger can be identified. - While it involves exposure, the gradual hierarchy and relaxation training are less effective for the complex, intrusive thoughts and compulsive rituals characteristic of **OCD**. *Cognitive behavioral therapy* - **CBT, particularly Exposure and Response Prevention (ERP)**, is considered the gold standard psychotherapy for OCD. - It directly addresses the **obsessions** by exposing the individual to feared thoughts or situations and then preventing the ritualistic responses. *SSRIs* - **Selective Serotonin Reuptake Inhibitors (SSRIs)** are the first-line pharmacological treatment for OCD due to their efficacy in reducing obsessive thoughts and compulsive behaviors. - They work by increasing the availability of **serotonin** in the brain. *Clomipramine* - **Clomipramine** is a tricyclic antidepressant (TCA) with potent **serotonergic effects**, making it highly effective in treating OCD, often when SSRIs are partially effective or not tolerated. - It is specifically approved for OCD and is sometimes considered a second-line or augmentation strategy.
Question 3: A woman comes to psychiatrist with history of spending a lot of time in washing her hands. She is distressed about it but says that she is not able to stop washing. This has started to affect her social life as well. What is the best mode of treatment for her?
- A. Exposure and response prevention (Correct Answer)
- B. Systematic desensitization
- C. Cognitive behavioral therapy
- D. Pharmacological agents
Explanation: ***Exposure and response prevention*** - **Exposure and response prevention (ERP)** is the **most specific and evidence-based** psychotherapy for **obsessive-compulsive disorder (OCD)**. - It is a specialized form of **Cognitive Behavioral Therapy (CBT)** that directly targets OCD by gradually exposing the individual to situations or objects that trigger their obsessions (e.g., dirt) and then preventing them from performing their compulsive rituals (e.g., handwashing). - **ERP is considered the gold standard psychotherapy** for OCD with the strongest evidence base, making it the **best** (most specific) answer. *Systematic desensitization* - This technique is primarily used for **specific phobias** and involves pairing relaxation techniques with gradual exposure to feared stimuli. - While it involves exposure, it does **not address the response prevention component** critical for treating compulsive rituals in OCD. - Less effective than ERP for OCD specifically. *Cognitive behavioral therapy* - **CBT is also a correct treatment** for OCD, as ERP is delivered within a CBT framework. - However, when answering "best mode of treatment," **ERP is the more specific answer** as it identifies the particular CBT technique with the strongest evidence for OCD. - Standard CBT without the specific ERP component (focusing only on cognitive restructuring) would be less effective than ERP for compulsive behaviors. *Pharmacological agents* - **SSRIs** (particularly high-dose) are first-line pharmacological treatment for OCD and often used in combination with ERP. - However, **psychotherapy with ERP** is generally considered the first-line treatment and can achieve significant long-term remission even as monotherapy. - The question asks for "mode of treatment" in a clinical context where behavioral intervention is being considered, making ERP the best answer.
Question 4: Which of the following drugs used for obsessive-compulsive disorder has maximum anticholinergic effect?
- A. Fluvoxamine
- B. Buspirone
- C. Sertraline
- D. Clomipramine (Correct Answer)
Explanation: ***Clomipramine*** - **Clomipramine** is a **tricyclic antidepressant (TCA)** with potent efficacy in OCD treatment. - It has **strong anticholinergic effects** including dry mouth, blurred vision, constipation, urinary retention, and cognitive impairment. - Among all medications used for OCD, clomipramine has the **maximum anticholinergic burden** due to its action on muscarinic receptors. - While effective for OCD, its significant side effect profile often limits its use to refractory cases. *Fluvoxamine* - **Fluvoxamine** is a **selective serotonin reuptake inhibitor (SSRI)** with FDA approval for OCD. - SSRIs have **minimal anticholinergic effects** compared to TCAs. - It selectively targets serotonin reuptake with little affinity for muscarinic cholinergic receptors. *Buspirone* - **Buspirone** is a **5-HT1A partial agonist** used primarily for **generalized anxiety disorder**. - It is **not a standard or approved treatment for OCD** - this makes it an inappropriate choice regardless of side effect profile. - It has negligible anticholinergic effects but lacks efficacy in OCD. *Sertraline* - **Sertraline** is an **SSRI** with FDA approval for OCD treatment. - Like other SSRIs, it has **very low affinity for muscarinic receptors** and minimal anticholinergic effects. - It is a first-line agent for OCD with a favorable side effect profile.
Question 5: A 45-year-old female presents to the OPD with complaints of "feeling tense" and experiencing stomach upset with heartburn and diarrhea. She reports having these symptoms for many years and mentions that her family members also usually feel tense and nervous. Which of the following symptoms is most likely to be seen in this patient?
- A. Ideas of reference
- B. Tingling of extremities (Correct Answer)
- C. Hallucination
- D. Neologism
Explanation: ***Tingling of extremities*** - The patient's presentation of "feeling tense," **stomach upset, heartburn, and diarrhea** for many years, alongside a family history of similar issues, suggests significant **anxiety**. - **Peripheral neurological symptoms** such as **tingling of extremities (paresthesia)** are common manifestations of anxiety and panic attacks due to **hyperventilation** (causing respiratory alkalosis and decreased ionized calcium) and **physiological arousal**. *Ideas of reference* - **Ideas of reference** are typically seen in **psychotic disorders** (e.g., schizophrenia) where a person believes that unrelated, external events have a special, personal meaning. - While anxiety can sometimes lead to misinterpretations, **ideas of reference** at a delusional level are not characteristic of generalized anxiety. *Hallucination* - **Hallucinations** are perceptual disturbances where an individual experiences sensory perceptions (e.g., hearing voices, seeing things) in the absence of an external stimulus. - These are core symptoms of **psychotic disorders** and are not typical findings in anxiety disorders without comorbid conditions. *Neologism* - A **neologism** is the coining of new words or phrases, often without clear meaning, which is a hallmark feature of disorganized thought in **psychotic disorders** (e.g., schizophrenia). - This symptom is related to severe thought disorganization and is not associated with anxiety disorders.
Question 6: Psychosurgery is used in which of the following conditions?
- A. Phobia
- B. Generalized anxiety disorder
- C. Obsessive-Compulsive Disorder (OCD) (Correct Answer)
- D. Depression
Explanation: **Explanation:** Psychosurgery, also known as functional neurosurgery for psychiatric disorders, is reserved for patients with severe, chronic, and treatment-resistant conditions who have failed to respond to multiple trials of pharmacotherapy (including high-dose SSRIs and augmentation) and intensive Cognitive Behavioral Therapy (CBT/ERP). **1. Why OCD is the Correct Answer:** OCD is the most common and well-established indication for psychosurgery today. The underlying pathophysiology involves hyperactivity in the **Cortico-Striato-Thalamo-Cortical (CSTC) circuit**. Surgical interventions aim to interrupt this circuit. Common procedures include: * **Subcaudate Tractotomy** * **Anterior Capsulotomy** (most common for OCD) * **Anterior Cingulotomy** * **Limbic Leukotomy** (combination of cingulotomy and tractotomy) **2. Why Other Options are Incorrect:** * **Phobia and GAD (Options A & B):** These anxiety disorders are primarily managed with psychotherapy (CBT) and pharmacotherapy (SSRIs/Benzodiazepines). There is no established surgical target or clinical evidence justifying psychosurgery for these conditions. * **Depression (Option D):** While "Treatment-Resistant Depression" (TRD) is a secondary indication for psychosurgery (specifically Cingulotomy), it is not the primary or most classic indication compared to OCD in the context of standard medical examinations. **High-Yield Clinical Pearls for NEET-PG:** * **Deep Brain Stimulation (DBS):** A modern, reversible alternative to ablative psychosurgery, often targeting the **Internal Capsule** or **Subthalamic Nucleus** for refractory OCD. * **Legal Aspect:** Under the **Mental Healthcare Act (MHCA) 2017** in India, psychosurgery can only be performed with the informed consent of the patient and prior approval from the State Mental Health Authority. * **Criteria:** Symptoms must be present for at least 5 years and be significantly disabling.
Question 7: Ego's defense mechanism "Undoing" is typically seen in which of the following conditions?
- A. Depression
- B. Schizophrenia
- C. Obsessive-compulsive neurosis (Correct Answer)
- D. Hysteria
Explanation: **Explanation:** The correct answer is **Obsessive-compulsive neurosis (OCD)**. **1. Why the correct answer is right:** **Undoing** is a primary defense mechanism characteristic of Obsessive-Compulsive Disorder. It is an unconscious process where an individual performs a specific action (a ritual or compulsion) to "cancel out" or "atone for" an unacceptable, anxiety-provoking thought or impulse. For example, a patient who has a blasphemous thought may compulsively recite a prayer to "undo" the perceived sin. In OCD, undoing works alongside other defense mechanisms like **Reaction Formation** and **Isolation of Affect**. **2. Why the incorrect options are wrong:** * **Depression:** The hallmark defense mechanism in depression is **Introjection** (turning anger inward). * **Schizophrenia:** Patients with schizophrenia typically use primitive defense mechanisms such as **Projection**, **Denial**, and **Splitting**. * **Hysteria (Dissociative/Conversion Disorders):** The classic defense mechanism here is **Repression** and **Conversion** (transforming psychological conflict into physical symptoms). **Clinical Pearls for NEET-PG:** * **Triad of Defense Mechanisms in OCD:** Undoing, Reaction Formation, and Isolation of Affect. * **Ego-dystonic:** OCD symptoms are recognized by the patient as irrational and unwanted (unlike OCPD, which is ego-syntonic). * **First-line Treatment:** SSRIs (at higher doses than for depression) and Cognitive Behavioral Therapy (specifically **Exposure and Response Prevention - ERP**). * **Neurobiology:** OCD is associated with structural abnormalities in the **Orbitofrontal cortex, Anterior Cingulate Cortex, and Caudate nucleus** (Cortico-striato-thalamo-cortical circuit).
Question 8: What is true about obsessive-compulsive disorder?
- A. Ego-alien
- B. The patient tries to resist against it
- C. Ego-syntonic (Correct Answer)
- D. Insight is present
Explanation: ### Explanation In the context of psychiatry, **Obsessive-Compulsive Disorder (OCD)** is traditionally characterized by symptoms that are **Ego-dystonic (Ego-alien)**. However, this specific question follows a pattern often seen in older medical entrance exams or specific textbook classifications where the focus is on the patient's internal experience of the thought. **1. Why "Ego-syntonic" is marked correct here:** While classic OCD is ego-dystonic (the patient finds thoughts intrusive and repugnant), this question likely refers to the **Obsessive-Compulsive Personality Disorder (OCPD)** or a specific examiner's view where the patient perceives the "need for order" as rational or part of their self-identity. *Note: In modern clinical practice and DSM-5/ICD-11, OCD is strictly ego-dystonic, while OCPD is ego-syntonic.* If this is a recall question where "Ego-syntonic" is the keyed answer, it highlights the distinction between the *disorder* (OCD) and the *personality* (OCPD). **2. Analysis of Incorrect Options:** * **A. Ego-alien (Ego-dystonic):** This is actually the hallmark of OCD. The patient views the obsessions as foreign and contrary to their own beliefs. * **B. Resistance:** In OCD, patients typically struggle and try to resist the obsessions/compulsions (at least initially). * **D. Insight:** Insight is usually present in OCD (the patient knows the thoughts are irrational), whereas it is often absent in OCPD. **High-Yield Clinical Pearls for NEET-PG:** * **OCD:** Ego-dystonic, insight present, resistance present, symptoms fluctuate. * **OCPD (Anankastic Personality):** Ego-syntonic, insight absent, no resistance, symptoms are pervasive traits. * **Treatment of choice for OCD:** SSRIs (High dose) + CBT (Exposure and Response Prevention). * **Most common obsession:** Contamination. * **Most common compulsion:** Checking.
Question 9: All are true about obsession, except:
- A. Recurrent foolish thoughts
- B. Associated with dim light (Correct Answer)
- C. Attempts to resist intrusive ideas
- D. Associated depression
Explanation: **Explanation:** Obsessive-Compulsive Disorder (OCD) is characterized by **obsessions** (intrusive, repetitive thoughts, urges, or images) and **compulsions** (repetitive behaviors or mental acts). **Why Option B is the correct answer (False statement):** There is no clinical or diagnostic association between obsessions and **dim light**. While some psychiatric conditions (like Seasonal Affective Disorder) are linked to light exposure, or certain phobias (like nyctophobia) involve darkness, light intensity is not a diagnostic feature or a known trigger for the phenomenology of obsessions. **Analysis of other options (True statements about obsession):** * **Option A (Recurrent foolish thoughts):** Obsessions are defined as recurrent and persistent thoughts that are often perceived by the patient as irrational, "foolish," or senseless (egodystonic). * **Option C (Attempts to resist):** A hallmark of obsession is that the individual recognizes the thoughts as a product of their own mind and typically makes active **attempts to ignore, suppress, or neutralize** them with some other thought or action (compulsion). * **Option D (Associated depression):** Comorbidity is extremely high in OCD. Approximately **60–80%** of patients with OCD will experience a Major Depressive Episode during their lifetime. **High-Yield Clinical Pearls for NEET-PG:** * **Egodystonic nature:** The patient recognizes the thoughts as irrational and contrary to their self-image (unlike delusions). * **Insight:** Usually preserved in OCD, though it can vary (good, fair, or poor insight). * **First-line Treatment:** Pharmacotherapy with **SSRIs** (often at higher doses than for depression) and psychotherapy, specifically **Exposure and Response Prevention (ERP)**. * **Neurobiology:** Associated with structural/functional abnormalities in the **Orbitofrontal Cortex, Anterior Cingulate Cortex, and Caudate Nucleus** (Cortico-striato-thalamo-cortical circuit).
Question 10: All of the following are true about Obsessive compulsive disorder EXCEPT?
- A. Washers
- B. Checkers
- C. Thought insertion causes distress
- D. Insight is absent (Correct Answer)
Explanation: In Obsessive-Compulsive Disorder (OCD), the defining characteristic is that the patient recognizes their obsessions and compulsions as **ego-dystonic** (irrational and originating from their own mind). **Explanation of Options:** * **Insight is absent (Correct Answer):** In OCD, insight is typically **preserved**. Patients are aware that their thoughts are excessive or unreasonable. While the DSM-5 allows for a specifier of "with absent insight/delusional beliefs," this is the exception rather than the rule. In contrast, absent insight is a hallmark of psychotic disorders (like Schizophrenia). * **Washers & Checkers:** These are the two most common clinical subtypes of OCD. **Washers** (Contamination obsessions) are the most frequent, followed by **Checkers** (Pathological doubt). * **Thought insertion causes distress:** In OCD, thoughts are perceived as internal but intrusive. If a patient experiences "thought insertion" (a Schneiderian First Rank Symptom), they feel the thought is alien. However, in the context of OCD-like presentations, the intrusive nature of these thoughts causes significant anxiety and distress, which the patient tries to neutralize. **High-Yield Clinical Pearls for NEET-PG:** * **Ego-dystonic vs. Ego-systonic:** OCD is ego-dystonic (distressing/unwanted), whereas Obsessive-Compulsive Personality Disorder (OCPD) is ego-syntonic (perceived as correct/ideal). * **First-line Treatment:** SSRIs (at higher doses than for depression) and Cognitive Behavioral Therapy (CBT) using **Exposure and Response Prevention (ERP)**. * **Drug of Choice (TCA):** Clomipramine (most potent serotonin reuptake inhibitor). * **Neurobiology:** Associated with hyperactivity in the **Orbitofrontal Cortex, Anterior Cingulate Cortex, and Caudate Nucleus** (Cortico-striato-thalamo-cortical circuit).
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