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Hiperactividad cortical visual similar a un rasgo en la ansiedad de rasgo

Zhaohan Wu1, Yuqi You1,2, Joshua A Brown3

  • 1Department of Psychology, Florida State University, Tallahassee, FL, USA.

Nature communications
|December 20, 2025
PubMed
Resumen

La ansiedad de rasgo está relacionada con una mayor actividad en las áreas de procesamiento visual temprano. Esta hiperactividad visual, específica de la vía parvocelular, ocurre rápidamente y no se modula por la excitación o el tipo de estímulo en personas con alta ansiedad.

Palabras clave:
ansiedad de rasgoprocesamiento visualhiperactividad corticalvía parvocelularneurocienciaexcitación-inhibición cortical

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Área de la Ciencia:

  • Neurociencia
  • Psicología Cognitiva
  • Psiquiatría

Sus antecedentes:

  • Las diferencias en el procesamiento sensorial, especialmente la hipersensibilidad, se correlacionan con rasgos emocionales y condiciones psiquiátricas.
  • Las teorías existentes a menudo vinculan el procesamiento sensorial-emocional con regiones cerebrales límbicas o prefrontales, pero la evidencia empírica es escasa.
  • La investigación emergente indica que la propia corteza sensorial codifica dinámicamente el valor, desafiando las teorías tradicionales de línea marcada.

Objetivo del estudio:

  • Investigar los fundamentos neuronales del vínculo entre la ansiedad de rasgo y el procesamiento sensorial.
  • Determinar si la actividad de la corteza visual temprana difiere en individuos con alta ansiedad de rasgo.
  • Explorar el papel del equilibrio entre excitación y inhibición cortical en la modulación de las respuestas sensoriales relacionadas con la ansiedad.

Principales métodos:

  • Se realizaron cuatro experimentos de electroencefalografía (EEG) de alta densidad con evaluaciones repetidas.
  • Se analizó la actividad cortical visual, centrándose específicamente en el procesamiento visual temprano (V1/V2) y la vía parvocelular.
  • Se evaluó el equilibrio entre excitación y inhibición cortical utilizando el exponente aperiódico del EEG (pendiente 1/f) y se correlacionó con las respuestas sensoriales.

Principales resultados:

  • Se identificó una hiperactividad visual cortical consistente en individuos con alta ansiedad de rasgo, que aparecía tan pronto como a los 46 ms.
  • Esta hiperactividad fue específica de la vía visual parvocelular y robusta en diferentes estados de excitación, valencias de estímulo y complejidades de imagen.
  • El equilibrio entre excitación y inhibición cortical predijo las respuestas parvocelulares en individuos con baja ansiedad, pero no en individuos con alta ansiedad, lo que sugiere una modulación alterada.

Conclusiones:

  • La ansiedad de rasgo altera significativamente el procesamiento visual temprano, manifestándose como hiperactividad en la vía parvocelular.
  • Estos hallazgos sugieren que las alteraciones en las computaciones corticales en las áreas sensoriales pueden subyacer a la predisposición de un individuo a la ansiedad.
  • Los resultados resaltan la importancia de considerar la función de la corteza sensorial en la neurobiología de los trastornos de ansiedad.