It has been demonstrated that certain parts of the human spine, more specifically the dorsally inclined lower thoracic and high lumbar parts, are subject to dorsally directed shear loads.

• 已经被证实人类脊柱的特定部位，尤其是背侧倾斜的下胸椎和上腰椎，易于受到指向背侧的剪切载荷。