B1 MOTONEURON

B1 is a large neuron located on the dorsal surface of each buccal ganglia. It has projections down the ipsi- and contralateral dorsal buccal nerves and is a putative salivary gland motoneuron. The two B1 motoneurons are electrically coupled.  During feeding cycles, B1 is active during the protraction phase due to excitation from the CPG interneuron N1M. B1 receives strong excitation from the cerebral modulatory interneurons, the CGCs. It is immunoreactive to both myomodulin and small cardioactive peptide.

References

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Benjamin, P.R., Rose, R.M., 1979. Central generation of bursting in the feeding system of the snail, Lymnaea stagnalis. J Exp Biol 80, 93–118. https://doi.org/10.1242/jeb.80.1.93

Benjamin, P.R., Rose, R.M., Slade, C.T., Lacy, M.G., 1979. Morphology of Identified Neurones in the Buccal Ganglia of Lymnaea Stagnalis. Journal of Experimental Biology 80, 119–135. https://doi.org/10.1242/jeb.80.1.119

Elliott, C.J., 1992. Cholinergic interneurons in the feeding system of the pond snail Lymnaea stagnalis. III. Pharmacological dissection of the feeding rhythm. Philos Trans R Soc Lond B Biol Sci 336, 181–189. https://doi.org/10.1098/rstb.1992.0055

Elliott, C.J., Kemenes, G., 1992. Cholinergic interneurons in the feeding system of the pond snail Lymnaea stagnalis. II. N1 interneurons make cholinergic synapses with feeding motoneurons. Philos Trans R Soc Lond B Biol Sci 336, 167–180. https://doi.org/10.1098/rstb.1992.0054

Elliott, C.J., Stow, R.A., Hastwell, C., 1992. Cholinergic interneurons in the feeding system of the pond snail Lymnaea stagnalis. I. Cholinergic receptors on feeding neurons. Philos Trans R Soc Lond B Biol Sci 336, 157–166. https://doi.org/10.1098/rstb.1992.0053

Santama, N., Brierley, M., Burke, J.F., Benjamin, P.R., 1994. Neural network controlling feeding in Lymnaea stagnalis: immunocytochemical localization of myomodulin, small cardioactive peptide, buccalin, and FMRFamide-related peptides. J Comp Neurol 342, 352–365. https://doi.org/10.1002/cne.903420304

Vehovszky, A., Elliott, C.J., 1995. The hybrid modulatory/pattern generating N1L interneuron in the buccal feeding system of Lymnaea is cholinergic. Invert Neurosci 1, 67–74. https://doi.org/10.1007/BF02331833

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Yeoman, M.S., Vehovszky, A., Kemenes, G., Elliott, C.J., Benjamin, P.R., 1995. Novel interneuron having hybrid modulatory-central pattern generator properties in the feeding system of the snail, Lymnaea stagnalis. J Neurophysiol 73, 112–124. https://doi.org/10.1152/jn.1995.73.1.112

McCrohan, C.R., Benjamin, P.R., 1980. Synaptic relationships of the cerebral giant cells with motoneurones in the feeding system of Lymnaea stagnalis. J Exp Biol 85, 169–186. https://doi.org/10.1242/jeb.85.1.169