North American Veterinary Licensing Examination (NAVLE) Practice Test

Fractures of the proximal sesamoid bones in horses are often associated with damage to which structure?

1. Superior check ligament

2. Deep digital flexor tendon

3. Suspensory ligament

4. Impar ligament

The correct answer is: Suspensory ligament

Fractures of the proximal sesamoid bones in horses are commonly associated with damage to the suspensory ligament. The proximal sesamoid bones are critical components in the equine forelimb, serving as a fulcrum for the suspensory apparatus, which plays a significant role in the horse's ability to bear weight and propel itself forward. When these sesamoid bones are fractured, the associated damage to the suspensory ligament occurs due to the relationship between these structures. The suspensory ligament originates from the back of the knee and runs down to attach to the palmar side of the proximal sesamoid bones. Therefore, any trauma that leads to a fracture of the sesamoid bones can cause additional strain or injury to the suspensory ligament because of their close anatomical and functional association. Understanding this relationship is crucial for both diagnosis and treatment planning in equine veterinary practice, as managing injuries to the suspensory ligament is essential to prevent further complications and ensure the horse's recovery and return to athletic function.