Noise and relaxation studies of acetylcholine induced currents in the presence of procaine.


1. The effects of procaine on the excitatory effects of acetylcholine (ACh) on Aplysia neurones were studied by analysing the current relaxations induced by voltage steps. Procaine was applied by perfusion and ACh was applied iontophoretically under two sets of experimental conditions designed to produce very different ACh concentrations at the membrane. 2… (More)