Issue Archive

Effect of stimulating the peripheral endings of transected dorsal root on discharges of neighbouring dorsal root in rats

Zhang Yong, Deng Yunping, Guan Xinmin

Department of Neurobiology,Tongji Medical University.Wuhan 430030,Hubei

Abstract

The dorsal roots (DR) of L2-L3 segments on the left side in anesthetized rats (n=28) were exposed and transected. After stimulating the peripheral endings of L2 DR with a train of square waves (0.8-1.2mA, 100 Hz, 0.5 ms) for 2 s, the discharges at the distal end of transected L3 DR were recorded for 120 s. We found that the mean discharge frequency (MDF) of L3 DR was gradually increased with L2 DR stimulation. Time course analysis showed that the increase in MDF was linearly correlative to the number of stimuli, as well as to the levels of spontaneous discharge of L3 DR.

Key words: Dorsal root;Sensory nerve endings;Information transmission;Rat

Received: 　　Accepted:

Corresponding author: 　　E-mail:

Citing This Article：

Zhang Yong, Deng Yunping, Guan Xinmin. Effect of stimulating the peripheral endings of transected dorsal root on discharges of neighbouring dorsal root in rats. Acta Physiol Sin 1999; 51 (4): (in Chinese with English abstract).