Are pre-ganglionic neurones recruited in a set order?
RM McAllen, D Trevaks
ACTA PHYSIOLOGICA SCANDINAVICA | WILEY | Published : 2003
AIM: The idea that, like somatic motor neurones, sympathetic pre-ganglionic neurones are engaged to fire in a pre-determined recruitment order, was investigated in chloralose-anaesthetized cats. METHOD: Ongoing pre-ganglionic spike activity was recorded from fine filaments of otherwise intact thoracic white rami, while post-ganglionic activity was recorded from the whole inferior cardiac nerve (ICN). Spikes of individual pre-ganglionic fibres were extracted from few-fibre recordings by spike shape analysis. Presumed cardiac pre-ganglionic fibres were further selected by the spike-triggered average of ICN activity, which showed a clear peak when triggered by their spikes. RESULTS: To test whe..View full abstract