- Committee on the Medical Aspects of Sports of the American MedicalAssociation 1968
- “Standard Nomenclature of Athletic Injuries”
- sprain = injury limited to ligaments
- strain = stretching injury of muscle or its tendinous attachment to bone
| Degree | Description |
|---|---|
| 1st | ~tear of a minimal number of fibers with localized tenderness but no instability |
| 2nd | ~disruption of more ligamentous fibers with more loss of function & more joint reaction with mild to moderate instability |
| 3rd | ~complete disruption with resultant marked instability further graded depending on the degree of instability demonstrated during stress testing ~1+ – surfaces separate 5 mm or less ~2+ = 5 to 10 mm ~3+ = 10 mm or more |