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Competencia interhemisférica durante el sueño

Lorenz A Fenk1, Juan Luis Riquelme2,3, Gilles Laurent4

  • 1Max Planck Institute for Brain Research, Frankfurt, Germany. lorenz.fenk@brain.mpg.de.

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|March 23, 2023
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Resumen

Los hemisferios cerebrales compiten durante el sueño. Los dragones barbudos muestran estados de sueño coordinados, pero el sueño REM involucra una competición entre los lados del cerebro, impactando la actividad del claustro.

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Área de la Ciencia:

  • La neurociencia
  • Fisiología Comparada
  • Investigación del sueño

Sus antecedentes:

  • Los mecanismos del sueño y la coordinación interhemisférica son complejos y no se comprenden completamente.
  • Conectar los estudios del sueño con los circuitos y mecanismos neuronales conocidos sigue siendo un desafío.

Objetivo del estudio:

  • Para investigar la coordinación interhemisférica durante diferentes estados de sueño en dragones barbudos.
  • Para aclarar la base neuronal de la competencia del lado del cerebro durante el sueño.

Principales métodos:

  • Registro bilateral de la actividad de la claustra en los dragones barbudos dormidos (Pogona vitticeps).
  • Análisis de los patrones de coordinación durante el sueño de ondas lentas y el sueño REM (REM P).
  • Investigación de la participación del cerebro medio, específicamente el núcleo GABAérgico del complejo istmático.

Principales resultados:

  • El comienzo y el final del sueño están coordinados bilateralmente.
  • La actividad de Claustra es descoordinada durante el sueño de onda lenta.
  • Durante el sueño REM P, la actividad de la claustra está coordinada pero no es sincrónica, con un lado principal que exhibe una actividad más fuerte, lo que indica una competencia bilateral.
  • Esta competencia se origina en el cerebro medio y depende del complejo istmático.

Conclusiones:

  • Existe una competencia entre los hemisferios cerebrales durante el sueño REM P en los dragones barbudos.
  • Esta competencia originada en el cerebro medio influye precisamente en la actividad y coordinación del claustro.
  • Los hallazgos ofrecen información sobre el control neuronal de las interacciones interhemisféricas durante el sueño.