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- W2133528738 abstract "Several motor networks have now been found to be multifunctional, in which one group of neurons participates in the generation of multiple behavioral motor programs. Not surprisingly, the behaviors involved are frequently closely related, often using the same or similar muscle groups. Here we describe an interneuronal network in the marine mollusk Tritonia diomedea that is involved in producing two highly dissimilar behaviors, rhythmic, muscle-based escape swimming and nonrhythmic, cilia-mediated crawling. Several observations support this conclusion. First, the dorsal swim interneurons (DSIs) of the swim central pattern generator (CPG) directly excite Pedal neuron 21 (Pd21) and Pd5, the only identified cilia-activating efferent neurons in Tritonia. Second, stimulation of a single DSI elicits beating of the foot cilia in semi-intact preparations and crawling in intact animal treadmill preparations. Third, the DSIs fire at an elevated rate for nearly 1 hr after a swim motor program, which correlates reasonably well with the period freely behaving animals were found to crawl after they swam. Fourth, silencing the tonically active DSIs after a swim motor program substantially reduces or eliminates ongoing cilia neuron firing, indicating that the DSIs are major contributors to the synaptic input driving these cells. Finally, all of the other swim CPG neurons also connect to the cilia neurons, most monosynaptically. Taken together, these observations indicate that the Tritonia swim CPG network participates in producing both escape swimming and crawling. Given the extreme differences between these behaviors---rhythmic versus tonic, muscular versus ciliary, and brief versus prolonged--these findings reveal a striking versatility for a small multifunctional network." @default.
- W2133528738 created "2016-06-24" @default.
- W2133528738 creator A5001103091 @default.
- W2133528738 creator A5021028046 @default.
- W2133528738 date "2002-03-01" @default.
- W2133528738 modified "2023-10-13" @default.
- W2133528738 title "Highly Dissimilar Behaviors Mediated by a Multifunctional Network in the Marine Mollusk<i>Tritonia diomedea</i>" @default.
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- W2133528738 doi "https://doi.org/10.1523/jneurosci.22-05-01985.2002" @default.
- W2133528738 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6758888" @default.
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