This study group provides a close look at the forelimb stay apparatus and how to work with it in Ortho-Bionomy, also bringing in the relationship of some forelimb fascia meridian lines. The stay apparatus is important to keep in mind when assessing lameness of the forelimb and how to treat it.

The equine stay apparatus is a system of muscles, tendons and ligaments that allows horses to stand and sleep for extended periods without tiring their muscles so they can conserve energy. In this study group we focus on the forelimb stay apparatus and its role in forelimb lameness. Both fore and hind lock the distal limb joints in extension, preventing overextension and collapse. Other muscles and ligaments further up the limb provide support for the locking extension phases. This passive stabilization is essential for horses, who maintain health by standing most of the time.

These muscles, tendons and ligaments of the stay apparatus – biceps brachii, triceps, collateral ligaments, superficial and deep digital flexor tendons, suspensory ligaments –  create a passive locking mechanism. When weight is applied, tension is created in these structures, “locking” the joints in a stable, extended position. This allows the horse to relax its muscles and conserve energy while standing.

The study group includes a Dropbox folder with handout, videos, and charts and the ability to view a 3D Anatomy model to support the work we do in class. A zoom recording is available to all participants.