Anatomy
1 questionsRoot value of the thoracodorsal nerve
NEET-PG 2013 - Anatomy NEET-PG Practice Questions and MCQs
Question 1171: Root value of the thoracodorsal nerve
- A. C6, C7, C8 (Correct Answer)
- B. T1, T2
- C. C5, C6, C7
- D. C6, T1
Explanation: ***C6, C7, C8*** - The **thoracodorsal nerve**, also known as the middle subscapular nerve, originates from the **posterior cord of the brachial plexus**. - Its specific root values are **C6, C7, and C8**, which supply motor innervation to the **latissimus dorsi muscle** [1]. - This nerve is one of the three subscapular nerves arising from the posterior cord [1]. *C5, C6, C7* - While these roots contribute to the **posterior cord**, the thoracodorsal nerve specifically arises from **C6, C7, C8**. - **C5** primarily contributes to the **upper and middle trunk** and is more associated with nerves like the **suprascapular** and **axillary nerves**. *C6, T1* - These root values contribute to various nerves of the **brachial plexus**, but not specifically the thoracodorsal nerve. - **T1** contributes mainly to the **medial cord** and its branches like the **ulnar nerve**, not the posterior cord from which the thoracodorsal nerve arises. *T1, T2* - These are typical root values for **intercostal nerves** and contribute to the **sympathetic trunk**, not the **brachial plexus** or its branches like the thoracodorsal nerve. - The brachial plexus predominantly arises from **C5 to T1 spinal nerve roots**, and **T2** is not part of the brachial plexus.
Dental
1 questionsWhich of the following is not commonly used for local infiltration anesthesia?
NEET-PG 2013 - Dental NEET-PG Practice Questions and MCQs
Question 1171: Which of the following is not commonly used for local infiltration anesthesia?
- A. Lidocaine
- B. Ropivacaine
- C. Dibucaine (Correct Answer)
- D. Bupivacaine
Explanation: ***Dibucaine*** - **Dibucaine** is a local anesthetic with a long duration of action but is rarely used for local infiltration due to its **high toxicity**. - Its narrow therapeutic index makes it less safe for common use compared to other available local anesthetics. *Lidocaine* - **Lidocaine** is one of the most widely used local anesthetics for **local infiltration** due to its rapid onset and intermediate duration of action. - It is effective for a variety of minor surgical procedures and dental interventions. *Ropivacaine* - **Ropivacaine** is an amide-type local anesthetic commonly used for **local infiltration** and regional anesthesia due to its good safety profile and differential block. - It produces less motor block and has a lower potential for cardiotoxicity compared to bupivacaine. *Bupivacaine* - **Bupivacaine** is frequently used for **local infiltration** and regional anesthesia, especially when a longer duration of action is desired. - It is known for its prolonged sensory block but has a higher risk of **cardiac toxicity** compared to lidocaine.
Psychiatry
8 questionsWhat is the age range associated with the concrete operational stage in Piaget's theory of cognitive development?
Who is known as the father of modern psychiatry?
Pavlov's experiment is an example of which of the following learning theories?
ECT is contraindicated in -
What is a contraindication for ECT?
Indications for ECT are all except?
In which condition is psychosurgery considered as a last resort treatment?
Flooding is a psychological treatment modality used in which of the following?
NEET-PG 2013 - Psychiatry NEET-PG Practice Questions and MCQs
Question 1171: What is the age range associated with the concrete operational stage in Piaget's theory of cognitive development?
- A. 2-6 years
- B. 5-10 years
- C. 7-11 years (Correct Answer)
- D. 10-15 years
Explanation: ***7-11 years*** - This age range aligns with Piaget's **concrete operational stage**, during which children develop **logical thinking** about concrete events. - They begin to understand **conservation**, classification, and seriation. *2-6 years* - This range corresponds to the **preoperational stage**, characterized by **egocentrism** and reliance on intuition rather than logical reasoning. - Children in this stage have not yet mastered the concept of conservation. *5-10 years* - While it partially overlaps, this range is not the precise and commonly accepted period for the **concrete operational stage** in Piaget's theory. - The upper limit of 10 years excludes the latter portion of this cognitive stage. *10-15 years* - This age range predominantly represents the **formal operational stage**, where adolescents develop the ability for **abstract thought**, hypothetical reasoning, and systematic problem-solving. - This thinking is more advanced than the concrete operations.
Question 1172: Who is known as the father of modern psychiatry?
- A. Bleuler
- B. Freud
- C. Kraepelin
- D. Philippe Pinel (Correct Answer)
Explanation: ***Philippe Pinel*** - **Philippe Pinel** is widely regarded as the **father of modern psychiatry** due to his revolutionary reforms in the treatment of the mentally ill in the late 18th and early 19th centuries - He advocated for a more humane approach, removing chains from patients and emphasizing **moral treatment**, which laid the foundation for modern psychiatric care - His work at Bicêtre Hospital (1793) and Salpêtrière Hospital marked a paradigm shift from custodial care to therapeutic intervention *Bleuler* - **Eugen Bleuler** is known for coining the term **"schizophrenia"** (1911) and describing its fundamental symptoms (the "four A's": associations, affect, ambivalence, autism) - While his contributions were significant in understanding and classifying mental illness, he built upon the foundations of humane psychiatric care already laid by Pinel *Freud* - **Sigmund Freud** is considered the **father of psychoanalysis**, a distinct therapeutic approach and theory of personality - His work focused on the unconscious mind, defense mechanisms, and psychosexual development, which are central to psychoanalytic theory but not the foundational shift in psychiatric care management that Pinel initiated *Kraepelin* - **Emil Kraepelin** is often referred to as the **father of modern psychiatric classification** due to his systematic approach to categorizing mental disorders based on their clinical course and outcome (dementia praecox vs manic-depressive illness) - His work profoundly influenced the development of diagnostic manuals like the DSM, but his focus was on nosology and classification rather than the initial humane treatment reform
Question 1173: Pavlov's experiment is an example of which of the following learning theories?
- A. Modeling
- B. Classical conditioning (Correct Answer)
- C. Operant conditioning
- D. Learned helplessness
Explanation: ***Classical conditioning*** - Pavlov's experiment with dogs, where he conditioned them to **salivate** at the sound of a bell, is the quintessential example of **classical conditioning**. - This learning theory involves forming an association between a **neutral stimulus** (the bell) and a **natural stimulus** (food) that produces an involuntary response (salivation). *Modeling* - **Modeling**, or observational learning, involves learning by **observing and imitating** others. - This theory is associated with **Albert Bandura** and his Bobo doll experiment, which is different from Pavlov's stimulus-response pairing. *Operant conditioning* - **Operant conditioning** involves learning through **rewards and punishments** for voluntary behaviors. - This theory is primarily associated with **B.F. Skinner**, where an organism learns to associate a behavior with its consequences. *Learned helplessness* - **Learned helplessness** occurs when an individual or animal learns that they have no control over negative situations, leading to a sense of powerlessness and **giving up**. - This concept was developed by **Martin Seligman** and is not related to Pavlov's experiments on associative learning.
Question 1174: ECT is contraindicated in -
- A. Very ill patients
- B. Raised ICT (Correct Answer)
- C. Heart disease
- D. Pregnancy
Explanation: ***Raised ICT (Correct Answer)*** - An increase in **intracranial pressure (ICP)** is the **only absolute contraindication** to ECT in modern practice. - ECT causes a **transient rise in ICP** during the seizure due to increased cerebral blood flow and cerebral metabolic rate. - In patients with pre-existing raised ICP (from brain tumors, subdural hematoma, or other space-occupying lesions), this additional increase can precipitate **brain herniation**, which is potentially fatal. - This makes raised ICP an **absolute contraindication** where the risks clearly outweigh any potential benefits. *Very ill patients* - ECT is **not contraindicated** in medically ill patients; in fact, it can be **life-saving** in severe psychiatric emergencies. - With careful medical evaluation, monitoring, and management, ECT can be safely administered to medically fragile individuals. - The rapid therapeutic response of ECT makes it particularly valuable when other treatments have failed or when quick intervention is critical. *Heart disease* - Cardiac conditions are **relative contraindications**, not absolute contraindications. - While conditions like recent MI, unstable angina, or severe arrhythmias require careful evaluation, ECT can be performed safely with appropriate cardiac optimization and monitoring. - Modern anesthetic techniques and cardiovascular management allow most patients with heart disease to receive ECT when clinically indicated. *Pregnancy* - **Pregnancy is NOT a contraindication** to ECT and is considered one of the safest treatment options for severe psychiatric illness during pregnancy. - ECT can be performed safely throughout all trimesters with appropriate obstetric consultation, fetal monitoring, and positioning adjustments. - It avoids the teratogenic risks associated with many psychotropic medications, making it a preferred option for severe depression or psychosis in pregnancy.
Question 1175: What is a contraindication for ECT?
- A. Epilepsy
- B. HIV
- C. Cerebral aneurysm (Correct Answer)
- D. Arrhythmia
Explanation: ***Cerebral aneurysm*** * A **cerebral aneurysm** is considered a **relative contraindication** for electroconvulsive therapy (ECT) due to the increased risk of rupture from the transient, but significant, rise in **blood pressure** and **intracranial pressure** during the procedure. * The cardiovascular stress induced by the seizure can worsen pre-existing vascular pathologies in the brain, making it a high-risk condition. *Arrhythmia* * While various cardiac conditions require careful monitoring during ECT, **arrhythmias** are generally not an absolute contraindication. * Patients can often undergo ECT with proper **cardiac monitoring** and **pharmacological management** to control the heart rhythm during the procedure. *Epilepsy* * **Epilepsy** is not a contraindication for ECT; in fact, ECT *artificially induces a seizure* to achieve therapeutic effects. * The presence of epilepsy primarily impacts the choice of **anticonvulsant medications** and the need for potentially higher seizure thresholds, but it does not preclude ECT. *HIV* * **HIV infection** itself is not a contraindication for ECT. * ECT can be safely administered to HIV-positive individuals, with consideration given to the patient's overall **physical health**, **medication interactions**, and any co-morbid opportunistic infections.
Question 1176: Indications for ECT are all except?
- A. Severe psychosis
- B. Catatonic schizophrenia
- C. Severe manic attack (Correct Answer)
- D. Severe depression with suicidal risk
Explanation: ***Severe manic attack*** - While **severe mania IS a recognized indication for ECT**, it is generally considered **less commonly used as first-line therapy** compared to the other options listed. - In clinical practice, **acute severe mania** is typically managed initially with **antipsychotics and mood stabilizers** (lithium, valproate), with ECT reserved for **treatment-resistant cases** or when rapid response is critical. - ECT is highly effective for severe mania, particularly with **psychotic features** or **medication intolerance**, but is not the **most typical first-choice indication** compared to severe depression or catatonia. - This question reflects the **relative clinical priority** of ECT indications rather than absolute contraindication. *Severe depression with suicidal risk* - This is the **most common and well-established indication for ECT**. - ECT provides **rapid antidepressant effect** (often within 1-2 weeks) and is particularly indicated when there is **imminent suicide risk**, **psychotic depression**, or **treatment-resistant depression**. - Response rates exceed 70-90% in severe depression, making it a primary indication. *Catatonic schizophrenia* - **Catatonia is one of the strongest indications for ECT**, regardless of underlying etiology (schizophrenia, mood disorders, or medical conditions). - ECT rapidly resolves **catatonic symptoms** including mutism, stupor, posturing, and waxy flexibility. - Often considered **first-line treatment** for severe or malignant catatonia due to life-threatening complications. *Severe psychosis* - ECT is indicated for **severe psychotic disorders** that are **treatment-resistant** or when patients cannot tolerate antipsychotic medications. - Particularly effective in **acute psychotic agitation**, **treatment-refractory schizophrenia**, and psychosis with high risk of harm. - Provides rapid symptom control when pharmacotherapy has failed or is contraindicated.
Question 1177: In which condition is psychosurgery considered as a last resort treatment?
- A. Severe Generalized Anxiety Disorder
- B. Severe Obsessive-Compulsive Disorder (Correct Answer)
- C. Severe Depression
- D. Severe Phobia
Explanation: ***Severe Obsessive-Compulsive Disorder*** - Psychosurgery (e.g., **anterior cingulotomy**, **capsulotomy**) is considered for individuals with **severe, refractory OCD** who have not responded to conventional treatments. - This intervention aims to disrupt specific neural circuits implicated in OCD, such as the **corticostriatothalamocortical (CSTC) loop**. *Severe Generalized Anxiety Disorder* - While GAD can be debilitating, standard treatments like **psychotherapy (CBT)** and **pharmacotherapy (SSRIs, SNRIs)** are generally effective. - Psychosurgery is not typically considered for GAD, as less invasive and established treatments carry significantly lower risks. *Severe Depression* - For severe, treatment-resistant depression, **electroconvulsive therapy (ECT)** and **transcranial magnetic stimulation (TMS)** are more common and established interventions. - Psychosurgery is rarely, if ever, used for severe depression due to ethical concerns and the availability of less invasive options. *Severe Phobia* - Severe phobias primarily respond to **exposure therapy** and **cognitive behavioral therapy (CBT)**. - These therapies directly target the learned fear response and are highly effective without the need for invasive procedures.
Question 1178: Flooding is a psychological treatment modality used in which of the following?
- A. Phobia (Correct Answer)
- B. Depression
- C. Mania
- D. Schizophrenia
Explanation: ***Phobia*** - **Flooding** is a specific type of **exposure therapy** that involves immediate and intense exposure to the feared object or situation for a prolonged period, without the possibility of escape. - This technique is primarily used to overcome **phobias** and other **anxiety disorders** by breaking the association between the feared stimulus and the anxiety response. *Depression* - Treatment for **depression** typically involves a combination of **pharmacotherapy** (antidepressants) and **psychotherapy**, such as cognitive-behavioral therapy (CBT) or interpersonal therapy. - While exposure techniques exist for some aspects of depression (e.g., social anxiety in depressive contexts), **flooding** is not a primary or standalone treatment modality for core depressive symptoms. *Mania* - **Mania**, a characteristic feature of **bipolar disorder**, is primarily treated with **mood stabilizers** (e.g., lithium, valproate) and sometimes antipsychotics. - Psychological interventions focus on **psychoeducation**, symptom monitoring, and adherence to medication, rather than exposure-based therapies like flooding. *Schizophrenia* - The primary treatment for **schizophrenia** involves **antipsychotic medications** to manage psychotic symptoms like hallucinations and delusions. - Psychological therapies, such as **cognitive-behavioral therapy for psychosis (CBTp)** and **family therapy**, aim to improve coping skills, reduce distress, and enhance social functioning, but **flooding** is not an appropriate or effective treatment.