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Los estados neuronales ocultos subyacen a la sintaxis de las canciones canarias
Yarden Cohen1, Jun Shen2, Dawit Semu3
1Department of Biology, Boston University, Boston, MA, USA. ycohen1@mgh.harvard.edu.
Nature
|June 20, 2020
Resumen
Los investigadores descubrieron neuronas en los canarios que recuerdan elementos de canciones pasadas, lo que permite reglas de sintaxis complejas y de largo alcance. Estos hallazgos revelan que las neuronas
Área de la Ciencia:
- La neurociencia
- El comportamiento de los animales
- La bioacústica
Sus antecedentes:
- Las vocalizaciones complejas como el habla humana y el canto de las aves exhiben reglas sintácticas.
- Las canciones canarias demuestran dependencias de largo alcance, donde la selección de frases depende de la estructura de la canción pasada.
- Los mecanismos neuronales que subyacen a estas reglas sintácticas de largo alcance siguen siendo en gran medida desconocidos.
Objetivo del estudio:
- Investigar los sustratos neuronales responsables de codificar las dependencias secuenciales de largo alcance en el canto del canario.
- Para identificar neuronas específicas y sus patrones de actividad relacionados con la sintaxis de la canción.
Principales métodos:
- Utilizó microscopios en miniatura montados en la cabeza para registrar la actividad neuronal en el núcleo premotor HVC de los canarios.
- Utilizó herramientas genéticas específicas del tipo de célula para la observación neuronal dirigida.
- Analizó la actividad neuronal durante la exploración de varias secuencias de frases en el repertorio del canario.
Principales resultados:
- Neuronas identificadas en el CVH que codifican transiciones pasadas en canciones de canario, que abarcan hasta cuatro frases y cuatro segundos.
- Estas neuronas codifican preferentemente acciones pasadas sobre acciones futuras.
- Se observó que estas neuronas reflejan múltiples historias de canciones y están activas durante las transiciones dependientes de la historia.
Conclusiones:
- La dinámica dentro de HVC involucra 'estados ocultos' que llevan información sobre acciones anteriores, no solo el comportamiento actual.
- Estos hallazgos sugieren un sustrato neural para el control de las transiciones de sintaxis regidas por reglas de largo alcance en el aprendizaje vocal.
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