Which anatomical position is less likely to expose the supraspinatus tendon?

The anatomical position that is less likely to expose the supraspinatus tendon is one characterized by extension, adduction, and internal rotation. In this position, the arm is brought closer to the body and rotated inward, which can provide added protection to the supraspinatus tendon by minimizing the space where it can be impinged or irritated.

The supraspinatus tendon is part of the rotator cuff and is most vulnerable during overhead movements or positions where the arm is in a flexed and abducted posture, such as when it is raised above shoulder level. In contrast, the positioning described in the correct answer reduces the likelihood of the tendon being in an advantageous position for impingement compared to positions that involve flexion and abduction, which tend to stretch or expose it more.

Considering that positions like flexion, abduction, and external rotation or adduction with internal rotation lead to a higher likelihood of the supraspinatus tendon being exposed to the greater tuberosity of the humerus, the choice of extension, adduction, and internal rotation represents a safer stance for the tendon. Thus, this anatomical alignment minimizes stress on the supraspinatus tendon and contributes to its protection during movement, aligning with the answer choice