Performance Enhancement — MCQs
Protein metabolism after trauma is characterized by the following except:
All of the following are side effects of growth hormone supplementation therapy except
Due to fear which of the following hormones increases rapidly?
All of the following are increased in Acute stress except
During a 100 m sprint which of the following is used by the muscle for meeting energy demands?
Painful arc syndrome is characterized by pain during which movement?
What is the primary pathology in Athletic Pubalgia?
Pain and tenderness over the lateral condyle of the humerus with painful dorsiflexion of the wrist is indicative of which of the following conditions?
What is true regarding Jumper's Knee?
Which test is used to assess for an ACL injury?
Performance Enhancement Indian Medical PG Practice Questions and MCQs
Question 1: Protein metabolism after trauma is characterized by the following except:
- A. Increased liver gluconeogenesis
- B. Increased urinary nitrogen loss
- C. Hepatic synthesis of acute phase reactants
- D. Inhibition of skeletal muscle breakdown by interleukin 1 and tumour necrosis factor (Correct Answer)
Explanation: ***Inhibition of skeletal muscle breakdown by interleukin 1 and tumour necrosis factor*** - After trauma, **interleukin 1 (IL-1)** and **tumor necrosis factor (TNF)** actually **promote** skeletal muscle breakdown (catabolism) to provide amino acids for gluconeogenesis and acute phase protein synthesis. - This statement is incorrect because these cytokines are **pro-catabolic**, not inhibitory, in their effect on muscle protein. *Increased liver gluconeogenesis* - Trauma leads to a significant increase in **liver gluconeogenesis**, primarily to maintain glucose supply for **immune cells** and wound healing, which rely heavily on glucose. - This process utilizes amino acids obtained from muscle breakdown as substrates. *Increased urinary nitrogen loss* - The breakdown of muscle protein releases amino acids, which are then deaminated. The nitrogen waste product, **urea**, is excreted in the urine, leading to **increased urinary nitrogen loss**. - This is a direct consequence of the catabolic state. *Hepatic synthesis of acute phase reactants* - The liver increases the synthesis of **acute phase reactants** (e.g., C-reactive protein, fibrinogen, haptoglobin) in response to inflammatory cytokines like IL-1, **IL-6**, and TNF. - These proteins play a crucial role in the inflammatory response and tissue repair.
Question 2: All of the following are side effects of growth hormone supplementation therapy except
- A. Slipped capital femoral epiphysis
- B. Pseudotumour cerebri
- C. Hypoglycemia (Correct Answer)
- D. Arthralgia
Explanation: ***Hypoglycemia*** - Growth hormone (GH) has an **anti-insulin effect**, increasing **insulin resistance** and hepatic glucose production, leading to **hyperglycemia** rather than hypoglycemia. - This diabetogenic effect contributes to a higher risk of developing **impaired glucose tolerance** and **type 2 diabetes mellitus** in individuals receiving long-term GH therapy. - GH is a **counter-regulatory hormone** that opposes insulin action. *Slipped capital femoral epiphysis* - Growth hormone supplementation can accelerate linear growth, which increases the risk of **mechanical stress** on the growth plate. - This rapid growth can lead to **weakening and displacement of the femoral capital epiphysis**, particularly in prepubertal and pubertal children. - This is a recognized orthopedic complication requiring monitoring during GH therapy. *Arthralgia* - Joint pain and stiffness are **common side effects** of GH therapy, affecting up to 25% of patients. - Related to **fluid retention** and **soft tissue swelling** caused by GH's effects on sodium and water retention. - May be accompanied by **myalgia** (muscle pain) and **carpal tunnel syndrome**. *Pseudotumour cerebri* - Also known as **benign intracranial hypertension**, this rare but serious side effect involves increased intracranial pressure without a tumor. - Presents with **headache, visual disturbances**, and **papilledema**. - Mechanism may involve alterations in **cerebrospinal fluid dynamics** and **increased CSF production** induced by GH.
Question 3: Due to fear which of the following hormones increases rapidly?
- A. Growth hormones
- B. Thyroid hormone
- C. Corticosteroid
- D. Epinephrine (Correct Answer)
Explanation: ***Epinephrine*** - **Epinephrine**, also known as adrenaline, is a hormone and neurotransmitter involved in the **"fight or flight" response** to stress, fear, or excitement. - When faced with fear, the **adrenal medulla** releases epinephrine, leading to rapid physiological changes like increased heart rate, blood pressure, and energy availability to prepare the body for immediate action. *Growth hormones* - **Growth hormone (GH)** primarily regulates growth, metabolism, and body composition. - While stress can influence GH secretion, a rapid increase in direct response to acute fear is not its primary function. *Thyroid hormone* - **Thyroid hormones (T3 and T4)** regulate metabolism, energy balance, and body temperature over a longer term. - Their primary role is not in the immediate, rapid physiological response to acute fear. *Corticosteroid* - **Corticosteroids**, such as cortisol, are released in response to stress, but their increase is typically more prolonged than the instant surge of epinephrine. - They play a role in modulating immune response and metabolism during stress but are not responsible for the immediate "fight or flight" reactions.
Question 4: All of the following are increased in Acute stress except
- A. Growth hormone
- B. Epinephrine
- C. Glucagon
- D. Insulin (Correct Answer)
Explanation: ***Insulin*** - During acute stress, **insulin secretion is actively suppressed** by catecholamines (epinephrine and norepinephrine) acting on **alpha-2 adrenergic receptors** on pancreatic beta cells. - This suppression is crucial for the stress response, as it allows **unopposed action of counter-regulatory hormones** to mobilize glucose and raise blood glucose levels. - The body prioritizes **immediate energy availability** (high blood glucose) over storage, making insulin the hormone that is **decreased, not increased**, during acute stress. *Growth hormone* - **Growth hormone** is a counter-regulatory hormone that **increases during acute stress** to mobilize energy stores, particularly by promoting lipolysis and gluconeogenesis. - Its actions contribute to the stress-induced elevation of **blood glucose levels**. *Epinephrine* - **Epinephrine** (adrenaline) is a primary catecholamine released during acute stress, leading to a rapid **fight or flight response**. - It significantly **increases heart rate**, blood pressure, and **glucose mobilization** through glycogenolysis and gluconeogenesis. *Glucagon* - **Glucagon** is a key hormone involved in **maintaining glucose homeostasis** and is significantly **increased during acute stress**. - It primarily acts on the liver to **stimulate glycogenolysis** and **gluconeogenesis**, thereby raising blood glucose levels to provide energy.
Question 5: During a 100 m sprint which of the following is used by the muscle for meeting energy demands?
- A. Phosphofructokinase
- B. Phosphocreatine (Correct Answer)
- C. Glucose 1 - phosphate
- D. Creatine phosphokinase
Explanation: ***Phosphocreatine*** - **Phosphocreatine (PCr)** is the primary energy source for a **100m sprint** (lasting 10-20 seconds). - The **ATP-PC (phosphagen) system** provides **immediate energy** by rapidly regenerating **ATP** from ADP through the transfer of a high-energy phosphate group. - This system is crucial for **short bursts of maximal intensity exercise** where energy demand exceeds the capacity of glycolysis and oxidative phosphorylation to respond quickly enough. - Phosphocreatine stores can fuel maximum effort for approximately **10-15 seconds**, making it ideal for sprint activities. *Phosphofructokinase* - **Phosphofructokinase (PFK)** is a key regulatory enzyme in **glycolysis**, not an energy substrate. - While PFK-catalyzed glycolysis contributes ATP during intense exercise, it cannot provide energy as rapidly as the phosphocreatine system. - Glycolysis becomes more prominent after the first 10-15 seconds of maximal effort. *Glucose 1-phosphate* - **Glucose 1-phosphate** is an intermediate in **glycogenolysis** (breakdown of glycogen to glucose-6-phosphate). - It is part of the pathway leading to glucose availability for glycolysis, but is not a **direct, immediate energy source** for muscle contraction. - Unlike phosphocreatine, it cannot directly regenerate ATP. *Creatine phosphokinase* - **Creatine phosphokinase (CPK)**, also known as **creatine kinase (CK)**, is the **enzyme** that catalyzes the reversible transfer of phosphate from phosphocreatine to ADP. - It facilitates the energy transfer reaction but is **not an energy substrate** itself. - The enzyme enables the phosphocreatine system to function, but the actual energy comes from phosphocreatine.
Question 6: Painful arc syndrome is characterized by pain during which movement?
- A. Initial abduction
- B. Terminal abduction
- C. Mid-range abduction (Correct Answer)
- D. Full range of abduction
Explanation: **Explanation:** **Painful Arc Syndrome** is a clinical sign typically associated with **Subacromial Impingement Syndrome**. It occurs when the structures within the subacromial space (most commonly the Supraspinatus tendon or the subacromial bursa) become compressed between the greater tuberosity of the humerus and the acromion process. 1. **Why Mid-range Abduction is Correct:** During abduction, the subacromial space is at its narrowest between **60° and 120°**. In this range, the inflamed or degenerated tendon is pinched against the acromial arch, eliciting sharp pain. This is the "mid-range" of motion. 2. **Analysis of Incorrect Options:** * **Initial Abduction (0°–15°):** Pain here usually indicates a complete Supraspinatus tear (inability to initiate) or severe tendonitis, but the subacromial space is not yet maximally compromised. * **Terminal Abduction (120°–180°):** Pain at the very end of abduction is characteristic of **Acromioclavicular (AC) joint arthritis**, not impingement. * **Full Range:** Pain throughout the entire range is more suggestive of adhesive capsulitis (Frozen Shoulder) or acute calcific tendonitis rather than a classic "arc." **Clinical Pearls for NEET-PG:** * **Neer’s Test and Hawkins-Kennedy Test:** These are the specific clinical provocative tests used to confirm subacromial impingement. * **The "Critical Zone":** The area of the Supraspinatus tendon roughly 1 cm proximal to its insertion is relatively avascular and is the most common site for pathology in this syndrome. * **Management:** Initial treatment is conservative (NSAIDs, PT, subacromial steroid injection). Surgical decompression (Acromioplasty) is reserved for refractory cases.
Question 7: What is the primary pathology in Athletic Pubalgia?
- A. Abdominal muscle strain (Correct Answer)
- B. Rectus femoris strain
- C. Gluteus medius strain
- D. Hamstring strain
Explanation: **Athletic Pubalgia**, commonly referred to as a "Sports Hernia," is a clinical syndrome characterized by chronic groin pain in athletes. Despite the name, there is no true clinical hernia present. ### **Explanation of the Correct Answer** The primary pathology involves a **strain or weakening of the posterior inguinal wall** and the **rectus abdominis insertion** onto the pubis. * **The Mechanism:** The rectus abdominis and the adductor longus act as antagonists. In high-intensity sports involving sudden changes in direction (soccer, hockey), the strong pull of the adductor muscles against a relatively weaker abdominal wall leads to micro-tears in the **rectus abdominis fascia** or the **external oblique aponeurosis**. This imbalance causes instability at the pubic symphysis. ### **Why Other Options are Incorrect** * **B. Rectus femoris strain:** This typically presents with anterior thigh pain and tenderness at the Anterior Inferior Iliac Spine (AIIS), often following explosive kicking or sprinting. * **C. Gluteus medius strain:** This causes lateral hip pain and weakness in abduction (Trendelenburg gait), not groin pain. * **D. Hamstring strain:** This involves the posterior compartment of the thigh, usually presenting with pain at the ischial tuberosity or the mid-muscle belly. ### **High-Yield Clinical Pearls for NEET-PG** * **Clinical Presentation:** Insidious onset of exercise-induced groin pain that radiates to the adductor region or testicles; pain is aggravated by Valsalva maneuvers or resisted sit-ups. * **Investigation of Choice:** **MRI** is the gold standard to visualize "cleft signs" or edema at the rectus abdominis-adductor longus attachment. * **Management:** Initial treatment is conservative (rest and PT). Surgery (pelvic floor repair or adductor tenotomy) is reserved for refractory cases. * **Differential Diagnosis:** Must be distinguished from **Osteitis Pubis**, which shows characteristic bony erosions and sclerosis on X-ray.
Question 8: Pain and tenderness over the lateral condyle of the humerus with painful dorsiflexion of the wrist is indicative of which of the following conditions?
- A. Golfer's Elbow
- B. Tennis Elbow (Correct Answer)
- C. Pitcher's Elbow
- D. Cricket Elbow
Explanation: **Explanation:** The clinical presentation described is a classic case of **Tennis Elbow**, also known as **Lateral Epicondylitis**. **1. Why Tennis Elbow is Correct:** Tennis elbow is a clinical condition characterized by pain and tenderness over the **lateral epicondyle** of the humerus. It is caused by repetitive strain and microtrauma at the common extensor origin, primarily involving the **Extensor Carpi Radialis Brevis (ECRB)** muscle. Since the ECRB is a primary wrist extensor, **resisted dorsiflexion (extension)** of the wrist exacerbates the pain, as it puts tension on the inflamed tendon origin. **2. Why Other Options are Incorrect:** * **Golfer’s Elbow (Medial Epicondylitis):** This involves the common flexor origin. Pain and tenderness are located over the **medial epicondyle**, and symptoms are aggravated by resisted **palmar flexion** of the wrist. * **Pitcher’s Elbow:** This refers to medial epicondyle apophysitis or ulnar collateral ligament (UCL) injury, typically seen in adolescent baseball players due to extreme valgus stress during throwing. * **Cricket Elbow:** This is a non-specific term but often refers to injuries like olecranon bursitis or posterior impingement due to repetitive bowling actions. **3. NEET-PG High-Yield Pearls:** * **Most common muscle involved:** Extensor Carpi Radialis Brevis (ECRB). * **Cozen’s Test:** Pain on resisted wrist extension with the elbow flexed (Diagnostic for Tennis Elbow). * **Mill’s Test:** Pain on passive wrist flexion and forearm pronation with the elbow extended. * **Maudsley’s Test:** Pain on resisted extension of the middle finger (due to ECRB tension). * **Treatment:** Conservative management (Rest, NSAIDs, bracing) is the first line. Refractory cases may require corticosteroid or PRP injections, or surgical release (Nirschl procedure).
Question 9: What is true regarding Jumper's Knee?
- A. Apophysitis of the patellar tendon as it inserts into the patella. (Correct Answer)
- B. Apophysitis of the patellar tendon as it inserts into the tibia.
- C. Apophysitis of the quadriceps tendon as it inserts into the patella.
- D. Apophysitis of the hamstring tendon as it inserts into the tibia.
Explanation: **Explanation:** **Jumper’s Knee**, also known as **Sinding-Larsen-Johansson (SLJ) syndrome** in the pediatric population, is a traction-related overuse injury. It is characterized by **apophysitis** (inflammation of the growth plate) or tendinopathy at the **inferior pole of the patella**, where the patellar tendon originates. This occurs due to repetitive stress from jumping and running, leading to microtrauma at the bone-tendon interface. **Analysis of Options:** * **Option A (Correct):** Jumper’s knee specifically involves the proximal attachment of the patellar tendon at the inferior pole of the patella. * **Option B (Incorrect):** Apophysitis at the insertion of the patellar tendon into the **tibial tuberosity** is known as **Osgood-Schlatter Disease**. This is the most common cause of knee pain in active adolescents. * **Option C (Incorrect):** Inflammation at the quadriceps tendon insertion (superior pole of the patella) is less common and is typically referred to as Quadriceps Tendinitis. * **Option D (Incorrect):** Hamstring insertions (like the Pes Anserinus) are located medially or posteriorly on the tibia; inflammation here is termed Pes Anserine Bursitis, not Jumper's Knee. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** Point tenderness at the inferior pole of the patella, exacerbated by resisted knee extension. * **Radiology:** X-rays may show calcification or fragmentation at the inferior pole of the patella in chronic cases (SLJ syndrome). * **Management:** Primarily conservative, involving rest, ice, activity modification, and eccentric strengthening of the quadriceps. * **Differential:** Always differentiate from Osgood-Schlatter (tibial tuberosity) and Patellar Tendonitis (adult version without apophysitis).
Question 10: Which test is used to assess for an ACL injury?
- A. Lachman test (Correct Answer)
- B. Bryant's test
- C. Jobe's test
- D. Hamilton's test
Explanation: **Explanation:** The **Lachman test** is considered the most sensitive and reliable clinical test for diagnosing an acute **Anterior Cruciate Ligament (ACL)** injury. It is performed with the knee in 20–30° of flexion. The examiner stabilizes the femur with one hand and applies an anterior force to the proximal tibia with the other. A positive result is indicated by increased anterior translation of the tibia or a "soft/mushy" end-point compared to the unaffected side. **Analysis of Incorrect Options:** * **Bryant's test:** Used in the assessment of **Developmental Dysplasia of the Hip (DDH)**. It involves measuring the vertical distance between the anterior superior iliac spine (ASIS) and the greater trochanter (Bryant’s triangle). * **Jobe’s test (Empty Can test):** Used to evaluate the **Supraspinatus muscle/tendon** (Rotator cuff). Pain or weakness when resisting downward pressure with the arms abducted and internally rotated suggests a tear or impingement. * **Hamilton’s test (Ruler test):** Used to diagnose **Shoulder Dislocation**. In a normal shoulder, a straight edge cannot touch the acromion and the lateral epicondyle of the humerus simultaneously; in dislocation, it can. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Clinical Test for ACL:** Lachman Test (Sensitivity ~95%). * **Pivot Shift Test:** Most specific test for ACL deficiency, indicating anterolateral rotatory instability. * **Anterior Drawer Test:** Less sensitive than Lachman in acute cases due to protective hamstring spasms and "meniscal wedge" effect. * **Segond Fracture:** An avulsion fracture of the lateral tibial plateau; it is pathognomonic for an ACL tear.
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