Biomarcadores de complejidad basados en EEG para el diagnóstico temprano de TDAH
Stanisław Kamiński1, Michal Byra1, Janusz Szczepanski1
1Institute of Fundamental Technological Research, Polish Academy of Science, Pawinskiego 5B, Warsaw, 02 - 106, Poland.
Resumen
El análisis de la complejidad de Lempel-Ziv (LZC) de las señales de electroencefalografía (EEG) revela una complejidad neuronal reducida en niños con trastorno por déficit de atención/hiperactividad (TDAH), particularmente en regiones cerebrales lateralizadas a la derecha.
Área de la Ciencia:
- Neurociencia
- Psiquiatría Computacional
- Descubrimiento de Biomarcadores
Sus antecedentes:
- El trastorno por déficit de atención/hiperactividad (TDAH) es un trastorno del neurodesarrollo prevalente caracterizado por déficits de atención y disfunción ejecutiva.
- El diagnóstico actual de TDAH se basa en la evaluación clínica, careciendo de marcadores biológicos objetivos.
Objetivo del estudio:
- Introducir y validar un método novedoso y no invasivo que utiliza electroencefalografía (EEG) y complejidad de Lempel-Ziv (LZC) para identificar firmas neuronales relacionadas con el TDAH.
- Explorar el potencial de LZC como biomarcador objetivo para el diagnóstico de TDAH.
Principales métodos:
- Los datos de EEG se analizaron utilizando la complejidad de Lempel-Ziv (LZC), una medida de la complejidad temporal de la señal.
- Se realizó un análisis espaciotemporal para identificar diferencias en la complejidad neuronal entre niños con TDAH y controles en desarrollo típico.
Principales resultados:
- El análisis LZC diferenció eficazmente el TDAH de los patrones de EEG de control, lo que indica una menor complejidad no lineal del EEG en niños con TDAH.
- Las diferencias grupales más significativas se observaron en los electrodos frontales (F8) y parietales (P8) lateralizados a la derecha, lo que sugiere una dinámica neuronal alterada en estas regiones.
- El análisis LZC reveló una dinámica alterada de la señal temporal del EEG local en el TDAH, particularmente en regiones asociadas con la atención visuoespacial y el control ejecutivo.
Conclusiones:
- El análisis LZC de las señales de EEG presenta un biomarcador complementario prometedor para el TDAH, que refleja una dinámica neuronal alterada.
- Este enfoque basado en la complejidad puede mejorar potencialmente la objetividad y la precisión de los diagnósticos de trastornos del neurodesarrollo.
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