腰神经根病致背根神经节受损的实验研究

目的　探讨神经根受压后对背根神经节的影响。　方法　 SD大鼠 50只。参照 Kawakami方法 ,显露左侧 L4～ 6神经根及背根神经节 ,用 4/0肠线于背根神经节头侧端结扎神经根两道打两个结 ,线与神经根相距 3 mm;自身右侧神经根为对照。术后 1、2、4、8和 1 2周 ,分别取 L4～ 6脊髓节段标本 ,依 Gomori法检测抗氟化物酸性磷酸酶 (FRAP)活性 ,并用图像分析。　结果　实验侧术后 4周 ,脊髓后角 FRAP含量开始降低 ,在所观察的 1 2周内 FRAP随时间延长 ,其含量降低 ,与对照侧比较有统计学意义 (P<0 .0 1 )。　结论　腰神经根慢性受压对背根神经节有损害

EXPERIMENTAL STUDY ON INJURY OF DORSAL ROOT GANGLIA IN LUMBAR RADICULOPATHY

Objective To investigate the effects of nerve root compression on dorsal root ganglia.Methods Following the method of Kawakami, 4/0 ribbon gut were applied around left L 4 6 spinal nerve roots in 50 SD rats. Just 3 mm cranial to the dorsal root ganglia, the nerve roots were secured by two ligation node. The nerve roots of right side were as control. The L 4 6 spinal cord was taken out 1, 2, 4, 8, 12 weeks after surgery, respectively. The activity of fluoride resistant acid phosphatase (FRAP) was determined by the enzyme histochemistry (Gomori method) and the image analysis technique. Results In the test side,the FRAP content of spinal dorsal horn reduced 4 weeks after operation. And there were gradually more and more decreases from 4 to 12 weeks. There was significant difference between the test side and control side( P< 0.01).Conclusion Chronic nerve root compression causes damage to dorsal root ganglia.