Many of the muscles of the hip (see [[Girdle Musculature - Anatomy & Physiology|Girdle Musculature]] and [[Rump Muscles - Anatomy & Physiology|Rump Muscles]]) act on the stifle by inserting on structures involved with the stifle or are distal to it. There are only really two muscles that act solely on the stifle; the '''quadriceps''' and the '''popliteal'''.
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Many of the muscles of the hip (see [[Hindlimb - Anatomy & Physiology#Girdle Musculature|Girdle Musculature]] and [[Hindlimb - Anatomy & Physiology#Rump Muscles|Rump Muscles]]) act on the stifle by inserting on structures involved with the stifle or are distal to it. There are only really two muscles that act solely on the stifle; the '''quadriceps''' and the '''popliteal'''.