Тест: Elbow Pathologies and Examination Techniques — 9 въпроса

1. Which nerve is affected in radial tunnel syndrome?

A. Ulnar nerve

B. Posterior interosseous nerve

C. Median nerve

D. Radial nerve

Answer: (B)

Обяснение

Radial tunnel syndrome involves compression of the posterior interosseous nerve (PIN), a branch of the radial nerve, as it passes through the radial tunnel. This nerve is responsible for motor innervation to some forearm extensor muscles, and its compression causes pain without motor deficits, distinguishing it from other nerve entrapments.

2. What is the primary anatomical structure affected in lateral epicondylitis, and which muscle tendon is most involved?

A. The ulnar nerve at the medial epicondyle

B. The flexor carpi ulnaris tendon

C. The extensor carpi radialis brevis tendon at the lateral epicondyle

D. The biceps brachii tendon at the attachment site on the radial tuberosity

Answer: (C)

Обяснение

Lateral epicondylitis predominantly involves degeneration of the extensor tendons, especially the extensor carpi radialis brevis, at the lateral epicondyle, which is often caused by overuse or repetitive stress.

3. What is the primary role of clinical history assessment in musculoskeletal examination?

A. To gather information about symptoms and their characteristics

B. To determine the patient's functional limitations

C. To perform specific physical maneuvers to provoke symptoms

D. To visualize the internal structures of the joint

Answer: (A)

Обяснение

The primary role of clinical history assessment is to gather detailed information about the patient's symptoms, onset, and related factors, which helps guide the diagnosis and subsequent management.

4. Which special test is most commonly used to diagnose lateral epicondylitis?

A. Cozen's test

B. Tinel's sign

C. Phalen's test

D. Finkelstein's test

Answer: (A)

Обяснение

Cozen's test, which involves resisted wrist extension, is frequently used to provoke lateral epicondylitis symptoms, confirming tendinopathy of the extensor tendons.

5. What does a musculoskeletal examination primarily involve?

A. Primarily a neurological assessment focusing on nerve function and reflexes

B. A comprehensive assessment including patient history, physical inspection, palpation, range of motion testing, and special tests

C. A brief history-taking session without physical examination or special tests

D. Only imaging studies like X-ray or MRI to diagnose joint and soft tissue injuries

Answer: (B)

Обяснение

A musculoskeletal examination is a comprehensive clinical assessment that combines patient history, visual inspection, palpation, range of motion testing, and special tests to diagnose joint, tendon, ligament, or nerve pathology.

6. Radial tunnel syndrome primarily involves compression of which nerve and causes which type of deficit?

A. Ulnar nerve; motor deficit

B. Posterior interosseous nerve; pain without motor or sensory deficit

C. Median nerve; sensory deficit

D. Radial nerve; sensory deficit over the dorsum of the hand

Answer: (B)

Обяснение

Radial tunnel syndrome is a compressive neuropathy of the posterior interosseous nerve (PIN), causing pain without causing motor weakness or sensory deficits, because it is a purely motor nerve.

7. Which ligament injury classification is most associated with elbow instability?

A. Lateral collateral ligament injury

B. Ulnar collateral ligament injury

C. Radial collateral ligament injury

D. Annular ligament injury

Answer: (A)

Обяснение

Lateral collateral ligament injuries compromise lateral elbow stability, often leading to instability, subluxation, or dislocation, especially during varus stress.

8. Which examination technique helps differentiate intra-articular from extra-articular elbow pathology?

A. Palpation of soft-tissue structures

B. Range of motion testing

C. Joint aspiration

D. Joint locking and swelling assessment

Answer: (D)

Обяснение

Features like joint locking, swelling, and instability during physical assessment help identify intra-articular pathology such as loose bodies or cartilage lesions.

9. In the context of elbow assessment, what imaging modality best visualizes soft tissue tendinopathy and nerve entrapment?

A. X-ray

B. MRI

C. CT scan

D. Bone scan

Answer: (B)

Обяснение

MRI provides detailed images of soft tissues, making it ideal for diagnosing tendinopathy, ligament injuries, and nerve entrapment around the elbow.