Anatomy MCQ 0036

The radial nerve

a. Is the principal branch of the posterior cord of the brachial plexus

b. Is derived from the posterior primary rami of the C5 to T1 nerve roots

c. Is the main nerve supply to the flexor compartments of the arm and forearm

d. Supplies sensation to the extensor aspect of the radial three and a half digits

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The Correct option is A

Explanation with High Yield Facts:

The radial nerve is the main branch of the posterior cord of the brachial plexus. Other branches of the posterior cord include the axillary, thoracodorsal and upper and lower subscapular nerves. All roots of the brachial plexus arise from the anterior primary rami. The radial nerve supplies the forearm and wrist extensors; A radial nerve palsy results in a classical 'wrist drop'. The anterior and posterior interosseus nerves are branches of the median and radial nerves respectively.

Anatomy MCQ 0029

The axilla contains all except

1. The cords of the brachial plexus
2. The superior thoracic artery
3. The latissimus dorsi muscle in its medial wall
4. The thoracodorsal nerve in its posterior wall

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The Correct option is B

Explanation with High Yield Facts:

The axilla contains the cords of the brachial plexus. The latissimus dorsi muscle forms the posterior wall of the axilla. It is supplied by the thoracodorsal nerve. The long thoracic nerve supplies serratus anterior and lies on the medial wall.

Anatomy MCQ 0016

Kanavel’s sign is seen in:

1. Tenosynovitis
2. Dupuyteren’s contracture
3. Carpal tunnel syndrome
4. Trigger finger

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The Correct option is A

Explanation with High Yield Facts :

Kanavel's sign, a point of maximum tenderness in the palm 2.5 cm proximal to the base of the little finger in infection of tendon sheath.

• goal is to distinguish infectious tenosynovitis from superficial or localized abscess
• Kanavel's Four Cardinal Signs

• for diagnosing infectious tenosynovitis;
• intense pain accompanies any attempt to extend partly flexed finger;
• this is absent in local involvement;
• pain will be noted along the course of tendon with extension;
• this is the earliest and most important sign;
• in case of a local furuncle, in contrast, the finger can be held straight without much pain;
• flexion posture: finger is held in flexion for comfort;
• uniform swelling involving entire finger in contrast to localized swelling in local inflammation;
• percussion tenderness along the course of the tendon sheath;
• tenderness is marked along the course of inflamed sheath in contrast to its absence in a localized inflammation;

Anatomy MCQ 0002

Ulnar injury in the arm leads to all except:

a. Sensory loss of the medial 1/3rd of the hand
b. Weakness of the hypothenar muscles
c. Claw hand
d. adduction of thumb



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The Correct option is D

Explanation with High Yield Facts :



Ulnar nerve supplies the Adductor pollicis muscle and hence it will be paralysed in its lesion. Hence, adduction of thumb is not a clinical finding in ulnar nerve palsy.