Tradeoffs in the energetic value of neuromodulation in a closed-loop neuromechanical system.
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| Format: | Artículo científico |
| Sprache: | en |
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Journal of theoretical biology
2025
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| author | Yu, Zhuojun Wang, Yangyang Thomas, Peter J Chiel, Hillel J |
| author_facet | Yu, Zhuojun Wang, Yangyang Thomas, Peter J Chiel, Hillel J Yu, Zhuojun Wang, Yangyang Thomas, Peter J Chiel, Hillel J |
| collection | PubMed - marine biology |
| contents | Tradeoffs in the energetic value of neuromodulation in a closed-loop neuromechanical system. Yu, Zhuojun Wang, Yangyang Thomas, Peter J Chiel, Hillel J Animals Aplysia Energy Metabolism Biomechanical Phenomena Models, Neurological Models, Biological Neurotransmitter Agents Muscles Rhythmic motor behaviors controlled by neuromechanical systems, consisting of central neural circuitry, biomechanics, and sensory feedback, show efficiency in energy expenditure. The biomechanical elements (e.g., muscles) are modulated by peripheral neuromodulation which may improve their strength and speed properties. However, there are relatively few studies on neuromodulatory control of muscle function and metabolic mechanical efficiency in neuromechanical systems. To investigate the role of neuromodulation on the system's mechanical efficiency, we consider a neuromuscular model of motor patterns for feeding in the marine mollusk Aplysia californica. By incorporating muscle energetics and neuromodulatory effects into the model, we demonstrate tradeoffs in the energy efficiency of Aplysia's rhythmic swallowing behavior as a function of the level of neuromodulation. A robust efficiency optimum arises from an intermediate level of neuromodulation, and excessive neuromodulation may be inefficient and disadvantageous to an animal's metabolism. This optimum emerges from physiological constraints imposed upon serotonergic modulation trajectories on the energy efficiency landscape. Our results may lead to experimentally testable hypotheses of the role of neuromodulation in rhythmic motor control. |
| format | Artículo científico |
| id | pubmed_39892775 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Journal of theoretical biology |
| record_format | pubmed |
| spellingShingle | Tradeoffs in the energetic value of neuromodulation in a closed-loop neuromechanical system. Yu, Zhuojun Wang, Yangyang Thomas, Peter J Chiel, Hillel J Animals Aplysia Energy Metabolism Biomechanical Phenomena Models, Neurological Models, Biological Neurotransmitter Agents Muscles Tradeoffs in the energetic value of neuromodulation in a closed-loop neuromechanical system. Yu, Zhuojun Wang, Yangyang Thomas, Peter J Chiel, Hillel J Animals Aplysia Energy Metabolism Biomechanical Phenomena Models, Neurological Models, Biological Neurotransmitter Agents Muscles Rhythmic motor behaviors controlled by neuromechanical systems, consisting of central neural circuitry, biomechanics, and sensory feedback, show efficiency in energy expenditure. The biomechanical elements (e.g., muscles) are modulated by peripheral neuromodulation which may improve their strength and speed properties. However, there are relatively few studies on neuromodulatory control of muscle function and metabolic mechanical efficiency in neuromechanical systems. To investigate the role of neuromodulation on the system's mechanical efficiency, we consider a neuromuscular model of motor patterns for feeding in the marine mollusk Aplysia californica. By incorporating muscle energetics and neuromodulatory effects into the model, we demonstrate tradeoffs in the energy efficiency of Aplysia's rhythmic swallowing behavior as a function of the level of neuromodulation. A robust efficiency optimum arises from an intermediate level of neuromodulation, and excessive neuromodulation may be inefficient and disadvantageous to an animal's metabolism. This optimum emerges from physiological constraints imposed upon serotonergic modulation trajectories on the energy efficiency landscape. Our results may lead to experimentally testable hypotheses of the role of neuromodulation in rhythmic motor control. |
| title | Tradeoffs in the energetic value of neuromodulation in a closed-loop neuromechanical system. |
| topic | Animals Aplysia Energy Metabolism Biomechanical Phenomena Models, Neurological Models, Biological Neurotransmitter Agents Muscles |
| url | https://pubmed.ncbi.nlm.nih.gov/39892775/ |