Interaction between inhibitory and excitatory synaptic potentials at a peripheral neurone.

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Abstract
The interaction between inhibitory and excitatory synaptic potentials in neurons lying in the submucous plexus of guinea-pig ileum was examined. During an inhibitory conductance change, electrotonic potentials were more depressed in amplitude than were excitatory synaptic potentials. Inhibitory conductance changes may have only a slight effect on the impedance seen by excitatory synaptic currents as much of the excitatory synaptic current flow is likely to be capacitive. A part of the depression of excitatory synaptic potential amplitude was not associated with changes in electrical properties of neurons and inhibitory transmitter may reduce the release of excitatory transmitter.