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Estructura y flexibilidad en las representaciones corticales del espacio olfativo
Stan L Pashkovski1, Giuliano Iurilli1,2, David Brann1
1Department of Neurobiology, Harvard Medical School, Boston, MA, USA.
Nature
|July 3, 2020
Resumen
El cerebro
Área de la Ciencia:
- La neurociencia
- Investigación del sistema olfativo
- Procesamiento sensorial
Sus antecedentes:
- La corteza organiza la información sensorial para la discriminación y la generalización.
- Todavía no está claro cómo la corteza olfativa codifica las relaciones químicas entre los olores para formar categorías perceptivas.
- Las representaciones sistemáticas del espacio olfativo químico en la corteza olfativa aún no se han descrito.
Objetivo del estudio:
- Para investigar cómo la corteza olfativa representa las relaciones químicas del olor.
- Para comparar la codificación del olor en la corteza piriforme y el bulbo olfativo.
- Para entender la transformación del bulbo a la corteza y su plasticidad.
Principales métodos:
- Análisis quimioinformático
- Imágenes multifotónicas en ratones
- Análisis de los patrones de actividad neuronal
Principales resultados:
- Tanto la corteza piriforme como el bulbo olfativo representan relaciones químicas de olor a través de patrones de actividad correlacionados.
- Los códigos de olor corticales agrupan olores relacionados más fuertemente que los códigos de bulbo.
- La corteza olfativa construye activamente una representación estructurada del espacio olfativo químico que resalta las relaciones y coincide con la percepción.
Conclusiones:
- La corteza olfativa construye activamente una representación estructurada del espacio de olor químico, enfatizando las relaciones de olor.
- Esta representación cortical es similar en todos los individuos, pero sigue siendo plástica.
- El sistema olfativo puede asignar señales de olor relacionadas a percepciones comunes pero personalizadas.
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