. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. 748 PHYSIOLOGY OP THE DOMESTIC ANIMALS. from the two rapid sounds when the feet of the opposite side strike the ground. It has been seen that in the movement of locomotion in man there are two periods of time in which both feet are on the ground and only one interval in which only one foot is in contact with the earth. In running, on the other hand, there is a moment in which one of the legs is raised up while the other is still performing the
. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. 748 PHYSIOLOGY OP THE DOMESTIC ANIMALS. from the two rapid sounds when the feet of the opposite side strike the ground. It has been seen that in the movement of locomotion in man there are two periods of time in which both feet are on the ground and only one interval in which only one foot is in contact with the earth. In running, on the other hand, there is a moment in which one of the legs is raised up while the other is still performing the pendulum motion, and, consequently, both legs are at one time in the air. This interval is, how- ever, much shorter than that in which both feet are on the ground. (c) The Trot.—The form of locomotion seen in the horse and more seldom in the ox and other quadrupeds which corresponds to the act of running in man is termed the trot, in which the fore leg completes its movement with the diagonal hind leg ; so that in the trot the diagonal feet and hind limbs at the same moment leave the ground and at the same. Mm£.AI.' Fig. 309.—The Trot. (Colin.) moment again reach it. Therefore, in the trot two strokes of the feet on the ground are heard at each step. In the fast trot an interval occurs between this double stroke of the feet against the ground in which the body is moving through the air with all four feet raised from the ground. This interval is variable, usually being about half the time that the feet are in contact with the ground. In the trot the impulse is communicated to the pelvis from each hind leg alternately, so tending to strain the articulation between the sacrum and vertebrae. This is, however, reduced to a minimum by the contrac- tion of the ilio-spinalis of the opposite side. In a very fast trot the second pair of feet leave the ground as soon as the first pair have reached the vertical position. Each step in the trot is twice as long as the step in the walk,
Size: 2085px × 1198px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysiol, bookyear1890
