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Directing or another characteristic of the joint, movement is also a specific form of relief of joint surfaces (articular condyles block articular screw propeller, etc.). Despite the limitations of movement in individual joints of the limbs, in an amount closer to its distal end, the greater grows the number of so-called "degrees of freedom of movement." For example, a finger of the foreleg has six degrees of freedom motion, ie, the number of degrees twice as large as spherical shoulder joint. prompted rising freedom of movement in the distal links of the limbs also contributes an original setting and articular condyles, ridges and corresponding grooves. For example, in a typical ginglime how is the ankle, due to an oblique statement of the screw is not only flexio, but supinatio abductio and distal hind limb in the removal of her forward. The two most common limb ginglima horse (elbow and hock) got the name "zipper joints (Schnappgelenke) Articular surface of the block of the humerus and the screw of the talus have the longest radius of the transition to the extreme positions of extension.Overcoming the time of this transition (labile position) the maximum voltage of collateral ligaments, located, in addition, not in the same plane as the joint would be latched (locked) to straighten out the state. When moving such an abrupt transition to the extension provides tolchek body during standing - to keep the limb in a position to straighten. In both cases, save muscular energy at a distance than under collateral ligaments of these joints play the role of a flexor brakes, the drag force which can be overcome only by actively reducing flexor muscles of the limb joints of these |