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Updated: Mar 22, 2026

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Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice
Published on: August 2, 2017
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Ondas lentas, ondas agudas, ondas y REM en dragones dormidos
Mark Shein-Idelson1, Janie M Ondracek1, Hua-Peng Liaw1
1Max Planck Institute for Brain Research, Frankfurt am Main, Germany.
Resumen
Los científicos descubrieron patrones de sueño de onda lenta (SW) y movimiento ocular rápido (REM) en lagartos, lo que sugiere que estas actividades cerebrales evolucionaron antes de lo que se pensaba, posiblemente antes de la aparición de los amniotas.
Área de la Ciencia:
- La neurociencia
- Biología evolutiva
- Fisiología Comparada
Sus antecedentes:
- El sueño, caracterizado por ondas lentas (SW) y movimientos oculares rápidos (REM), está bien documentado en mamíferos y aves.
- Anteriormente se creía que estas características electrofisiológicas del sueño eran exclusivas de los mamíferos y las aves.
Objetivo del estudio:
- Investigar la presencia y las características del sueño SW y REM en reptiles.
- Para determinar los orígenes evolutivos de los patrones de sueño de los mamíferos y las aves.
Principales métodos:
- Se realizaron grabaciones electrofisiológicas en el cerebro del lagarto dragón australiano (Pogona vitticeps).
- El análisis se centró en la identificación de patrones oscilatorios indicativos del sueño SW y REM.
Principales resultados:
- Se identificaron patrones de sueño SW y REM en el cerebro del lagarto.
- Estos patrones de sueño exhibieron oscilación continua durante 6 a 10 horas con un período de aproximadamente 80 segundos.
- La dinámica SW de la lagartija, originada en la cresta ventricular dorsal, mostró similitudes con el CA1 del hipocampo de los roedores, a pesar de la falta de similitud hodológica.
Conclusiones:
- Los hallazgos sugieren que el sueño SW y REM evolucionaron al menos hasta la aparición de amniotas.
- El antiguo circuito oscilador que controla el antagonismo SW-REM en los amniotas puede conservarse.
- Los reptiles exhiben dinámicas complejas del sueño que antes se pensaba que eran exclusivas de los mamíferos y las aves, ofreciendo nuevas ideas sobre la evolución del sueño.
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