Summary of Background Data.The spinal cord has remarkable ability to resist chronic compression, howeer, delayed paralysis is sometimes seen following the deelopment of spinal kyphosis.

• 背景资料的概要：脊索有显著的抵抗慢性压迫的能力，然而，迟发性的偏瘫有时伴随着脊柱后凸的发展。