Memories are stored as synaptic plasticity patterns rather than chemical or emotional signatures
Extensive neuroscience research demonstrates that long-term memories are encoded and stored primarily through enduring modifications in synaptic strength and connectivity patterns, such as long-term potentiation and structural plasticity.
The retrieved literature overwhelmingly supports the claim that memories are stored via synaptic plasticity and structural changes in neural circuits (such as LTP and engram connectivity). While paper [0] notes that conclusive single-proof remains challenging and non-synaptic mechanisms are occasionally proposed, the vast majority of studies (e.g., [1], [2], [5], [7], [9]) corroborate synaptic plasticity as the primary substrate of memory storage.
W. Abraham, O. Jones, D. Glanzman. Is plasticity of synapses the mechanism of long-term memory storage?. 2019. https://doi.org/10.1038/s41539-019-0048-y
Hebb's theory and subsequent research dominate the view that synapses serve as the principal site of information storage in the brain.
See more details
E. Santini, Thu N. Huynh, E. Klann. Mechanisms of Translation Control Underlying Long-lasting Synaptic Plasticity and the Consolidation of Long-term Memory. 2014. https://doi.org/10.1016/B978-0-12-420170-5.00005-2
Protein synthesis and long-lasting synaptic plasticity (such as LTP) are required for the formation and consolidation of long-term memory.
H. C. Dringenberg. The history of long-term potentiation as a memory mechanism: Controversies, confirmation, and some lessons to remember.. 2020. https://doi.org/10.1002/hipo.23213
Empirical evidence strongly suggests that long-term potentiation (LTP) serves as a primary mechanism for learning and memory storage.
Hong I, Kim Y, Jung H, Kim CH, Cho JH, Kaang BK. Protein synthesis blockade prevents fear memory reactivation via inhibition of engram synapse strengthening.. 2026. https://doi.org/10.1073/pnas.2510016123
Engram synapse density and structural potentiation correlate directly with memory formation and successful recall.
M. Samavat, T. Bartol, Cailey Bromer, Dusten D. Hubbard, Dakota C. Hanka, M. Kuwajima, J. Mendenhall, Patrick H. Parker, Jared B. Bowden, W. Abraham, T. Sejnowski, Kristen M. Harris. Long-Term Potentiation Produces a Sustained Expansion of Synaptic Information Storage Capacity in Adult Rat Hippocampus. 2024. https://doi.org/10.1101/2024.01.12.574766
LTP enhances synaptic information storage capacity by expanding spine head volumes and increasing structural precision.
Clara Ortega-de San Luis, Maurizio Pezzoli, Esteban Urrieta, Tomás J. Ryan. Engram cell connectivity as a mechanism for information encoding and memory function. 2023. https://doi.org/10.1101/2023.09.21.558774
Specific synaptic wiring and plasticity mechanisms between engram cells act as the substrate of information storage.
The paper trail · every fact has a biography
Challenge the receipt
Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.
Terms · Privacy · How verdicts work · Dispute this receipt