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The Complement of Projection Neurons Activated Determines the Type of Feeding Motor Program in . | LitMetric

AI Article Synopsis

  • - Researchers studied the unique roles of multiple projection neurons in the feeding system, specifically focusing on a neuron called CBI-2, which can initiate ingestive motor programs after being stimulated repeatedly, leading to improved feeding responses.
  • - The study found that in some instances, the expected pattern of "repetition priming" (where programs become more ingestive with continued stimulation) does not occur, and this pattern can be found year-round without any seasonal influence.
  • - Additionally, when CBI-2 is electrically connected to another neuron, CBI-3, coactivation results in an immediate and effective ingestive response without the need for priming, suggesting that the specific combination of active neurons can influence the feeding behavior significantly.

Article Abstract

Multiple projection neurons are often activated to initiate behavior. A question that then arises is, what is the unique functional role of each neuron activated? We address this issue in the feeding system of . Previous experiments identified a projection neuron [cerebral buccal interneuron 2 (CBI-2)] that can trigger ingestive motor programs but only after it is repeatedly stimulated, i.e., initial programs are poorly defined. As CBI-2 stimulation continues, programs become progressively more ingestive (repetition priming occurs). This priming results, at least in part, from persistent actions of peptide cotransmitters released from CBI-2. We now show that in some preparations repetition priming does not occur. There is no clear seasonal effect; priming and non-priming preparations are encountered throughout the year. CBI-2 is electrically coupled to a second projection neuron, cerebral buccal interneuron 3 (CBI-3). In preparations in which priming does not occur, we show that ingestive activity is generated when CBI-2 and CBI-3 are coactivated. Programs are immediately ingestive, i.e., priming is not necessary, and a persistent state is not induced. Our data suggest that dynamic changes in the configuration of activity can vary and be determined by the complement of projection neurons that trigger activity.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8222659PMC
http://dx.doi.org/10.3389/fncir.2021.685222DOI Listing

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