What reproduction test is associated with posterior interosseous syndrome?

What reproduction test is associated with posterior interosseous syndrome?

• A. Active wrist flexion
• B. Passive forearm pronation
• C. Resisted elbow extension
• D. Active supination from a pronated position

Answer: (D)

The reproduction test associated with posterior interosseous syndrome is active supination from a pronated position. This is because posterior interosseous syndrome primarily affects the radial nerve, specifically its deep branch, which innervates the muscles responsible for supination, including the supinator muscle and the wrist extensors. When a patient attempts to actively supinate from a fully pronated position, it may lead to discomfort or weakness due to the involvement of the affected nerves and muscles, effectively reproducing the symptoms associated with this syndrome. The other tests, while potentially related to other conditions affecting the upper extremity, do not specifically target the deficits or pain associated with posterior interosseous syndrome in the same way that active supination does. This makes active supination a more accurate reproduction test for diagnosing this condition.

The reproduction test associated with posterior interosseous syndrome is active supination from a pronated position. This is because posterior interosseous syndrome primarily affects the radial nerve, specifically its deep branch, which innervates the muscles responsible for supination, including the supinator muscle and the wrist extensors.

When a patient attempts to actively supinate from a fully pronated position, it may lead to discomfort or weakness due to the involvement of the affected nerves and muscles, effectively reproducing the symptoms associated with this syndrome. The other tests, while potentially related to other conditions affecting the upper extremity, do not specifically target the deficits or pain associated with posterior interosseous syndrome in the same way that active supination does. This makes active supination a more accurate reproduction test for diagnosing this condition.