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Proyecciones callosales no recíprocas y gradientes de entrada subyacen a la comunicación interhemisférica en la

Suraj Honnuraiah¹, Helena Huang², Elisabetta Furlanis³

¹John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia; Department of Neurobiology, Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA.

|January 14, 2026

Resumen

El cerebro combina información visual utilizando distintas vías neuronales en la corteza visual del ratón. Este estudio revela un circuito no recíproco para la comunicación interhemisférica, que afecta la excitabilidad neuronal y la visión binocular.

Área de la Ciencia:

Neurociencia
Neurociencia Computacional
Neurociencia de Sistemas

Sus antecedentes:

La comunicación interhemisférica integra información de ambos hemisferios cerebrales.
Los mecanismos precisos de integración de información en la corteza visual aún no se comprenden completamente.
Los circuitos neuronales que median el procesamiento visual interhemisférico son clave para comprender la función cerebral.

Objetivo del estudio:

Elucidar los mecanismos del circuito que subyacen a la comunicación interhemisférica en la corteza visual binocular del ratón.
Investigar los roles de poblaciones neuronales específicas en la transferencia de información entre hemisferios.
Explorar cómo las propiedades neuronales y la conectividad dan forma al procesamiento visual.

Principales métodos:

Trazado anatómico para identificar neuronas que proyectan callosalmente (CPN) y neuronas receptoras callosales (CRN).
Registros electrofisiológicos para evaluar la excitabilidad neuronal y la expresión del canal de potasio (Kv1/KCNA2).
Caracterización funcional de la binocularidad neuronal y su correlación con la entrada callosal.

Principales resultados:

Se identificaron CPN y CRN anatómicamente segregados con conexiones callosales no recíprocas.
Los CRN exhiben una excitabilidad reducida debido a una mayor expresión del canal Kv1, lo que se correlaciona con la magnitud de la entrada callosal.
Los CRN son predominantemente binoculares, mientras que los no CRN (presuntos CPN) son predominantemente monoculares, con la binocularidad correlacionada con la entrada callosal.

Conclusiones:

Las proyecciones callosales no recíprocas entre CPN y CRN forman un circuito novedoso para la comunicación interhemisférica.
Las diferencias en la excitabilidad neuronal, moduladas por la entrada callosal, son cruciales para la integración de la información visual.
Esta arquitectura de circuito subyace al intercambio efectivo de información interhemisférica en la corteza visual binocular.

Palabras clave:

biología celular neurociencia canales Kv1 visión binocular proyecciones callosales cuerpo calloso comunicación interhemisférica dominio ocular optogenética pinza patch célula piramidal corteza visual

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