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Videos de Conceptos Relacionados

Long-Term Memory01:18

Long-Term Memory

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Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
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Role of Neurotransmitters in Memory01:23

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Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
 Glutamate and Synaptic Plasticity
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Role of Cerebellum and Prefrontal Cortex in Memory01:14

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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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Long-term Depression01:03

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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Video Experimental Relacionado

Updated: Jan 10, 2026

Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
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Las puertas transcripcionales talamocorticales coordinan la estabilización de la memoria

Andrea Terceros1, Celine Chen1, Yujin Harada1

  • 1Laboratory of Neural Dynamics and Cognition, The Rockefeller University, New York, NY, USA.

Nature
|November 26, 2025
PubMed
Resumen

Los científicos descubrieron una cascada molecular que involucra CAMTA1, TCF4 y ASH1L que estabiliza los recuerdos con el tiempo. Esta vía es crucial para la persistencia de la memoria a largo plazo en el cerebro.

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Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation
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Videos de Experimentos Relacionados

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Área de la Ciencia:

  • La neurociencia
  • Biología molecular
  • La genética

Sus antecedentes:

  • Los mecanismos de persistencia de la memoria a largo plazo siguen siendo poco conocidos.
  • Identificar la base molecular de la consolidación de la memoria y el olvido es crucial para comprender la función cognitiva.

Objetivo del estudio:

  • Para investigar los programas moleculares que subyacen a la persistencia de la memoria durante semanas.
  • Para identificar los reguladores moleculares clave involucrados en la estabilización de los recuerdos.
  • Para aclarar la dinámica temporal de la expresión génica en el mantenimiento de la memoria.

Principales métodos:

  • Desarrolló una tarea de comportamiento en ratones para diferenciar entre recuerdos consolidados y olvidados.
  • Programas moleculares específicos del circuito y ondas de transcripción monitoreadas en el circuito talamocortical.
  • Se utilizaron estudios de nocaut de CRISPR para evaluar el papel causal de reguladores transcripcionales específicos.

Principales resultados:

  • Se identificaron ondas distintas de transcripción (macrostatos celulares) que se correlacionan con la persistencia de la memoria.
  • Descubrió que CAMTA1, TCF4 y ASH1L orquestan los programas de estabilización de la memoria.
  • Se han demostrado funciones dependientes del tiempo: CAMTA1 para el mantenimiento inicial (días), TCF4 y ASH1L para la estabilización posterior (semanas).

Conclusiones:

  • Una cascada transcripcional talamocortical CAMTA1-TCF4-ASH1L es esencial para la estabilización de la memoria.
  • Propone un modelo donde los programas secuenciales de transcripción permiten un mantenimiento de memoria progresivamente más largo.
  • Destaca el papel crítico de los factores de transcripción específicos en la persistencia de la memoria a largo plazo.