A 6 year old boy has a history of recurrent dislocation of the right shoulder. On examination, the ohopedician puts the patient in the supine position and abducts his arm to 90 degrees with the bed as the fulcrum and then externally rotates it but the boy does not allow the test to be performed. The test done by the ohopedician is:

**Core Concept**
The test described is a physical examination maneuver used to assess the integrity of the shoulder joint, specifically the labrum and the surrounding muscles. It is a variation of the apprehension test, which is commonly used to diagnose labral tears and shoulder instability.

**Why the Correct Answer is Right**
The test performed by the orthopedician is a modification of the apprehension test, which involves abducting the arm to 90 degrees and then externally rotating it while the patient is in a supine position. This maneuver puts stress on the labrum and the surrounding muscles, causing discomfort and apprehension in patients with labral tears or shoulder instability. The fact that the boy does not allow the test to be performed indicates a positive result, suggesting that he has a labral tear or shoulder instability.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a recognized physical examination test for shoulder instability or labral tears.
**Option B:** This option is not a valid test for shoulder instability or labral tears, and it does not match the description of the test performed by the orthopedician.
**Option C:** This option does not match the description of the test performed by the orthopedician and is not a recognized physical examination test for shoulder instability or labral tears.

**Clinical Pearl / High-Yield Fact**
The apprehension test is a key physical examination maneuver for diagnosing labral tears and shoulder instability. A positive result can indicate a labral tear or shoulder instability, which may require further imaging studies or surgical intervention.

**Correct Answer: C. Apprehension Test**

✓ Correct Answer: A. Apprehension test