The carpus consists of several small bones arranged in two rows and 3 associated joints between the forearm (radius and ulna) and the cannon (metacarpus). Due to its resemblance to a human kneejoint, it is often refered to as the knee, however anatomically speaking it is a different joint entirely (equivalent to the wrist).

Knock-kneed / carpusvalgus: a conformational fault of the forelimbs when viewed from the front. An imaginary line dropped from the shoulder passes through the lateral portion of the carpal joint; the carpal deviates medially.