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Los correlatos neuroanatómicos de la ansiedad anticipada
E M Reiman1, M J Fusselman, P T Fox
1Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110.
Science (New York, N.Y.)
|February 24, 1989
Resumen
La ansiedad anticipatoria, una emoción normal, mostró un aumento del flujo sanguíneo en los polos temporales del cerebro. Estos hallazgos vinculan la actividad de los polos temporales con los estados de ansiedad normales y patológicos.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- La psiquiatría es la psiquiatría.
- Imágenes médicas de imágenes médicas.
Sus antecedentes:
- La ansiedad es una emoción humana común con fundamentos neurobiológicos complejos.
- Comprender la base neuronal de la ansiedad es crucial para desarrollar tratamientos efectivos.
- Investigaciones anteriores han implicado varias regiones cerebrales en las respuestas de ansiedad.
Objetivo del estudio:
- Para investigar los correlatos neuroanatómicos de la ansiedad anticipatoria normal.
- Para identificar regiones cerebrales que muestran actividad neuronal alterada durante la ansiedad.
- Explorar el papel de áreas específicas del cerebro en la ansiedad normal y patológica.
Principales métodos:
- Utilizó la tomografía por emisión de positrones (PET) para medir el flujo sanguíneo cerebral regional (rCBF).
- Se evaluó el rCBF en voluntarios sanos antes, durante y después de anticipar una descarga eléctrica dolorosa.
- Cambios correlacionados en el flujo sanguíneo con la experiencia subjetiva de la ansiedad.
Principales resultados:
- Se observaron aumentos significativos en el flujo sanguíneo en los polos temporales bilaterales durante la ansiedad anticipada.
- Estas regiones del polo temporal fueron previamente implicadas en la ansiedad inducida por el lactato en pacientes con trastorno de pánico.
- Demostró un vínculo entre la actividad del polo temporal y la experiencia de ansiedad.
Conclusiones:
- Los polos temporales son regiones clave del cerebro involucradas en la neurobiología de la ansiedad humana normal.
- Los hallazgos sugieren un sustrato neuroanatómico compartido para la ansiedad anticipatoria normal y los estados de ansiedad patológica.
- Destaca el papel de los polos temporales en las respuestas de ansiedad adaptativas y no adaptativas.
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