Neurotransmitters in memory destabilization: An integrative perspective framed by prediction error and novelty

Area of Science:

• Neuroscience
• Cognitive Science
• Molecular Biology

Background:

• Memory reconsolidation involves a destabilization phase crucial for updating memories.
• Current understanding of neurotransmitter roles in memory destabilization is fragmented.
• A unified framework is needed to integrate diverse findings on neurotransmitter signaling during memory reactivation.

Purpose of the Study:

• To introduce a novel integrative framework for understanding neurotransmitter-mediated memory destabilization.
• To organize existing evidence around novelty and prediction error (PE) signaling.
• To propose a unified model explaining the dynamic regulation of memory stability and flexibility.

Main Methods:

• Synthesizing experimental findings on dopamine (DA), norepinephrine (NE), acetylcholine (ACh), glutamatergic/GABAergic, and endocannabinoid systems.
• Analyzing how PE and novelty signaling engage distinct neural pathways.
• Integrating theoretical concepts and experimental data across multiple systems.

Main Results:

• A proposed PE-Novelty-Neurotransmitter Network integrates multimodal neurotransmitter co-release.
• This network operates across the midbrain-locus coeruleus-cortex circuit.
• The framework explains how neurotransmitters dynamically regulate memory stability versus flexibility.

Conclusions:

• The PE-Novelty-Neurotransmitter Network offers a unified perspective on memory plasticity.
• Understanding these neuromodulatory processes can inform strategies for modifying maladaptive memories.
• This framework bridges mechanistic insights with translational applications in therapeutic contexts.