NAVLE Musculoskeletal

Equine Lameness Study Guide

Lameness is the most common clinical problem in equine practice and represents a significant portion of NAVLE questions.

Overview and Clinical Importance

Lameness is the most common clinical problem in equine practice and represents a significant portion of NAVLE questions. Defined as any alteration in normal gait or stance, lameness is typically caused by pain but may also result from mechanical or neurological dysfunction. The equine industry loses over $500 million annually due to lameness-related issues, making proficiency in lameness evaluation essential for every veterinarian.

Understanding the systematic approach to lameness examination, localization techniques, and common conditions affecting the equine musculoskeletal system is critical for both clinical practice and board examination success.

Grade Description
0 Lameness not perceptible under any circumstances
1 Lameness difficult to observe; not consistently apparent regardless of circumstances (under saddle, circling, inclines, hard surface)
2 Lameness difficult to observe at walk or trotting straight; consistently apparent under certain circumstances (weight-carrying, circling, inclines, hard surface)
3 Lameness consistently observable at a trot under all circumstances
4 Lameness obvious at a walk
5 Minimal weight bearing in motion and/or at rest; complete inability to move (non-weight bearing)

AAEP Lameness Grading Scale

The American Association of Equine Practitioners (AAEP) developed a standardized 0-5 lameness grading scale for consistent documentation and communication.

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