When this form of the exercise is well understood, the trainer proceeds to the second form, in which the entire fore leg is extended forward.
For this, the rider's hand, in calling for the partial flexion of the neck, is first carried at the regular position, or, if necessary, a little lower. This position of the hand gives the fixed point at the atlas region, and thus acts directly on the rhomboideus muscle, which by its contraction raises the fore leg, and on the trapezius which holds the fore leg raised and flexed. In the meantime, the low position of the hand, as the flexion is asked, inhibits the action of the mastoido-humeralis. If now the hand is raised progressively from its low position, the tension from the fixed point at the atlas region will be communicated to the mastoido-humeralis , which will enter into action, extend the entire fore leg forward, and hold it there so long as the fixed point remains at the atlas region. This exercise is, then, the second form of the jambette. (Figure 28.)
These jambettes will teach the horse to raise its fore legs and to extend them at the effect produced by the hands of the rider, both in motion and standing still. By this means the fore legs are so placed as to receive and support their proper portion of the entire load. The partial flexions used to obtain a single jambette to the right or left are now replaced by a direct flexion of the lower jaw and neck, which gives the alternate jambettes of the two limbs. By the two positions of the hands, low for the flex-
