Pacemaker activity and neuropeptides

Stimulation of Interneuron Evokes Bursting Activity

Effect of stimulation of the peptidergic interneuron on the activity of the RPa1 neuron . A and B is continuous record; upper record, activity of the RPa1 neuron, lower record, activity of the interneuron. Bars show the time of the interneuronal stimulation.

Contact between interneuron and RPa1

Cobalt-staining of both interneuron and RPa1 neuron of Helix pomatia. V.n. - visceral nerve. Triangle indicates the axon branch of the interneuron which could be in contact with axon of the RPa1 neuron. Arrow indicates the axon branch of the interneuron which has been traced in the visceral nerve.