THE EFFECTS OF SODIUM SELENITE ON VENTRAL ROOT REFLEXS IN THE ISOLATED TOAD SPINAL CORD
- VernacularTitle:亚硒酸钠对离体蟾蜍脊髓腹根反射的影响
- Author:
Fangli ZHAO
;
Jun MEI
;
- Publication Type:Journal Article
- Keywords:
Selenite;
Ventral root reflexs;
Depolarization;
Post-tetanus hyperpolarization
- From:
Journal of Xi'an Jiaotong University(Medical Sciences)
1981;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
The effects of sodium selenite on ventral root reflexs in the isolated spinal cord of the toad were investigated. It was found that the effects of selenite on ventral root reflexs were excited first and then inhibited gradually. Using sucrose gap technique, we have found that selenite produced a significant depolarization on the rentral roots. Mg~(2+)ion markedly reduced this effect, which indicated that selenite had an importment action on interneurons activities of the spinal cord. Sodium selenite could antagonized the post-tetanus hyperpolarization of the ventral roots, which gave another evidenoe for proving its depolarization. The data described above suggest that the actions of sodium selenite on toad spinal cord are exciting first and then inhibiting gradually.
