Conclusion. These data show that, in humans and in quadrupeds , the thoracic spine is less rotationally stable under dorsal shear loads than under ventral shear loads.

结论：这些数据显示，对于人和四肢动物，在背侧剪切载荷下比在胸侧剪切载荷下胸椎旋转稳定性更小。