The function of intersegmental connections in determining temporal characteristics of the spinal cord rhythmic output

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2007
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Ben-Jacob, Eshel
Cohen, Avis
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Neuroscience. 2007, 147(1), pp. 236-246. ISSN 0306-4522. eISSN 1873-7544. Available under: doi: 10.1016/j.neuroscience.2007.04.014
Zusammenfassung

Recent renewed interest in the study of rhythmic behaviors and pattern-generating circuits has been inspired by the currently well-established role of oscillating neuronal networks in all aspects of the function of our nervous system: from sensory integration to central processing, and of course motor control. An integrative rather than reductionist approach in the study of pattern-generating circuits is in accordance with current developments. The lamprey spinal cord, a relatively simple and much-studied preparation, is a useful model for such a study. It is an example of a chain of coupled oscillatory units that is characterized by its ability to demonstrate robust coordinated rhythmic output when isolated in vitro. The preparation allows maximum control over the chemical (neuromodulators and hormones) as well as neuronal environment (sensory and descending inputs) of the single oscillatory unit: the pattern-generating circuit. The current study made use of recently developed tools for nonlinear analysis of time-series, specifically neurophysiological signals. These tools allow us to reveal and characterize biological-functional complexity and information capacity of the neuronal output recorded from the lamprey model network. We focused on the importance of different types of inputs to an oscillatory network and their effect on the network's functional output. We show that the basic circuit, when isolated from short- and long-range neuronal inputs, demonstrates its full potential of information capacity: maximal variation quantities and elevated functional complexity. Morphological and functional constraints result in the network exhibiting only a limited range of the above. This constitutes an important substrate for plasticity in neuronal network function.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
570 Biowissenschaften, Biologie
Schlagwörter
central pattern generator, lamprey, cross-correlation, complexity
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ISO 690AYALI, Amir, Einat COUZIN-FUCHS, Eshel BEN-JACOB, Avis COHEN, 2007. The function of intersegmental connections in determining temporal characteristics of the spinal cord rhythmic output. In: Neuroscience. 2007, 147(1), pp. 236-246. ISSN 0306-4522. eISSN 1873-7544. Available under: doi: 10.1016/j.neuroscience.2007.04.014
BibTex
@article{Ayali2007-06-15funct-46904,
  year={2007},
  doi={10.1016/j.neuroscience.2007.04.014},
  title={The function of intersegmental connections in determining temporal characteristics of the spinal cord rhythmic output},
  number={1},
  volume={147},
  issn={0306-4522},
  journal={Neuroscience},
  pages={236--246},
  author={Ayali, Amir and Couzin-Fuchs, Einat and Ben-Jacob, Eshel and Cohen, Avis}
}
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    <dcterms:abstract xml:lang="eng">Recent renewed interest in the study of rhythmic behaviors and pattern-generating circuits has been inspired by the currently well-established role of oscillating neuronal networks in all aspects of the function of our nervous system: from sensory integration to central processing, and of course motor control. An integrative rather than reductionist approach in the study of pattern-generating circuits is in accordance with current developments. The lamprey spinal cord, a relatively simple and much-studied preparation, is a useful model for such a study. It is an example of a chain of coupled oscillatory units that is characterized by its ability to demonstrate robust coordinated rhythmic output when isolated in vitro. The preparation allows maximum control over the chemical (neuromodulators and hormones) as well as neuronal environment (sensory and descending inputs) of the single oscillatory unit: the pattern-generating circuit. The current study made use of recently developed tools for nonlinear analysis of time-series, specifically neurophysiological signals. These tools allow us to reveal and characterize biological-functional complexity and information capacity of the neuronal output recorded from the lamprey model network. We focused on the importance of different types of inputs to an oscillatory network and their effect on the network's functional output. We show that the basic circuit, when isolated from short- and long-range neuronal inputs, demonstrates its full potential of information capacity: maximal variation quantities and elevated functional complexity. Morphological and functional constraints result in the network exhibiting only a limited range of the above. This constitutes an important substrate for plasticity in neuronal network function.</dcterms:abstract>
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