脊髓的神经在刨伤后不再生长,不是因为它们不能生长,而是因为有些东西阻碍它们穿过受伤区域生长的道路。俄亥俄州克利夫兰市凯斯西部保留地医学院的Francis Liuzzi和Raymond Lasek发现了为什么神经在进入损伤区时就停止生长(见《科学》237卷,642页)。周围神经与脊髓中上上下下的神经不同,当手指或足趾肌肉丧失神经接触时周围神经能够再生。Liuz-zi和Lasek注视再生的神经细胞怎样对付脊髓的敌对环境。研究人员使大鼠脊柱近旁的感觉神经遭受压坏损伤,并用电子里微镜监视中枢神经轴突向脊髓方 The nerves of the spinal cord no longer grow after planing, not because they can not grow, but because something hinder their growth through the injured area. Francis Liuzzi and Raymond Lasek, of the Case Western Reserve Medical School in Cleveland, Ohio, discovered why the nerve stopped growing as it entered the injury zone (see Science 237, p. 642). Peripheral nerves are different from the upper and lower nerves in the spinal cord and regenerate the peripheral nerves when the fingers or toes muscles lose their nerve contact. Liuz-zi and Lasek look at how regenerating nerve cells deal with the hostile environment of the spinal cord. The researchers underwent a crush injury on the sensory nerve in the vicinity of the spine of the rat and monitored the axons of the central nervous system in the spinal cord using electron micrographs