RHYTHMIC ACTIVITIES IN THE RAT SOLITARY COMPLEX INVITRO

被引:9
作者
FORTIN, G [1 ]
BRANCHEREAU, P [1 ]
ARANEDA, S [1 ]
CHAMPAGNAT, J [1 ]
机构
[1] UNIV PARIS 06,INST NEUROSCI,DEPT CYTOL,F-75230 PARIS 05,FRANCE
关键词
RHYTHM; SYNAPTIC CURRENT; NUCLEUS-TRACTUS-SOLITARII; DORSAL VAGAL MOTOR NUCLEUS; WHOLE-CELL RECORDING;
D O I
10.1016/0304-3940(92)90194-C
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
In adult mt brainstem slices, rhythmic discharge of action potentials occurred spontaneously in 10 out of 197 cells of the solitary complex. In 6 neurones, fast rhythms (2-6 per min) were characterized by volleys of synaptic activity presenting abrupt onset denoting synchronized discharge of presynaptic elements. Synchronizing signals may be generated by cells discharging bursts of high-frequency action potentials and presenting extensive axonal arborization, as observed in one cell. Slower rhythms (0.3-0.8 per min) monitored in three cells did not involve synchronizing processes and could be evoked in non-rhythmic cells by 15-30 min bath application of the cholecystokinin octapeptide (100 nM). These results suggest distinct operating mechanisms of fast and slow rhythms in the solitary complex in vitro.
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页码:23 / 27
页数:5
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