Physical Therapy Assistant Practice Exam

The presence of a 15-degree carrying angle in a patient with elbow injury could indicate stress on which ligament?

1. Radial collateral ligament

2. Annular ligament

3. Ulnar collateral ligament

4. Transverse ligament

The correct answer is: Ulnar collateral ligament

The presence of a 15-degree carrying angle in the elbow suggests an adaptation to the anatomical positioning of the forearm concerning the upper arm, primarily influencing the ulnar collateral ligament. This ligament extends from the humerus to the ulna and is critical for maintaining elbow stability, especially in movements involving overhead activities or throwing motions. In individuals with notable stress or injury to the elbow, an increase in the carrying angle may indicate that the ulnar collateral ligament is experiencing excessive tension. This is often due to the nature of the activities performed, where improper mechanics or overuse can lead to microtrauma in the ligament, ultimately making it susceptible to injury. Understanding the anatomy and biomechanics of the elbow helps in recognizing that the ulnar collateral ligament is particularly affected by changes in the carrying angle, making it essential in the assessment of elbow injuries.