N2M CPG NEURON

N2m is a neuron located on the ventral surface of the buccal ganglia. It has an elongated bipolar configuration with projections down the ipsilateral lateral buccal nerve and across the buccal commissure to the contralateral buccal ganglion. N2m is a rasp phase central pattern generator interneuron and is electrically couple with another rasp phase interneuron, N2v. Manipulation of N2m activity is sufficient to alter feeding rhythm generation. N2m has strong electrical coupling with rasp phase motoneurons such that subthreshold depolarizations in N2m are sufficient to trigger action potentials in these motoneurons.

References

Crossley, M., Simon, A., Marathe, S., Rau, C., Roth, A., Marra, V., Staras, K., 2025. Functional mapping of the molluscan brain guided by synchrotron X-ray tomography. PNAS.