Which ligament is primarily injured in gameskeeper's thumb?

Gameskeeper's thumb refers to an injury to the ulnar collateral ligament of the thumb. This injury typically occurs due to a forceful abduction of the thumb, often when an individual is gripping an object and experiences a sudden pull or jolt. The ulnar collateral ligament is crucial for the stability of the metacarpophalangeal joint of the thumb, as it prevents excessive movement that can lead to a dislocation or improper alignment of the thumb.

Injuries to this ligament can significantly affect a person's ability to pinch or grasp, which can lead to considerable functional impairment. Proper diagnosis and treatment are critical to restoring thumb functionality, including potential surgical intervention if the ligament is completely torn. Understanding the role of the ulnar collateral ligament helps reinforce the importance of ligaments in joint stability and overall hand function in orthopedic practice.