Summary
This study describes the neural basis of respiratory behavior in a pulmonate mollusc, Lymnaea stagnalis. We describe and identify muscles of the respiratory orifice (pneumostome) and mantle cavity as well as relevant motor neurons innervating these muscles. All of these identified motor neurons are active during spontaneously occurring respiratory behavior and a sporadically occurring synaptic input, termed Input 3, controls the activities of these motor neurons. This spontaneous input can also be recorded from isolated brain preparations, suggesting that the respiratory motor program is generated centrally. However, evidence is also presented that in semi-intact preparations the role of peripheral feedback is important for the initiation and termination of respiratory behavior in Lymnaea.
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Syed, N.I., Harrison, D. & Winlow, W. Respiratory behavior in the pond snail Lymnaea stagnalis . J Comp Physiol A 169, 541–555 (1991). https://doi.org/10.1007/BF00193545
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DOI: https://doi.org/10.1007/BF00193545