[Dorsal root potential evoked by stimulation of periaqueductal gray and its efferent pathway analysis in rats].

Abstract

When periaqueductal gray (PAG) was stimulated with concentric electrodes, a steady negative potential called PAG-DRP was recorded from L5 dorsal root. PAG-DRP with properties of spatial and temporal summation propagates decrementally along the dorsal root and is inhibited by picrotoxin. Lesions of NRM had no effect on the PAG-DRP evoked by stimulation of dorsal PAG, but showed obvious reduction up to about 40% on the PAG-DRP evoked by stimulation of ventral PAG. It is suggested that the descending inhibition of PAG includes some presynaptic inhibition and that the ventral PAG-DRP is relayed partly via NRM while the dorsal PAG-DRP is not associated with NRM.

Cite this paper

@article{Zhang1990DorsalRP, title={[Dorsal root potential evoked by stimulation of periaqueductal gray and its efferent pathway analysis in rats].}, author={Arina Li Zhang and Z F Cheng}, journal={Sheng li xue bao : [Acta physiologica Sinica]}, year={1990}, volume={42 3}, pages={203-9} }