The Story
Enrichment reshapes many mouse synapse populations, but permanence and behavioral meaning remain separate questions.
The map shows a powerful but selective response: enrichment reorganized molecularly distinct excitatory synapses across many regions, while other synapse groups stayed unchanged. That establishes brainwide plasticity in mice. It does not establish that every alteration persists permanently, transfers directly to humans, or produces a particular cognitive benefit.
- The study detected experience-dependent reconfiguration of excitatory synapse populations in more than 100 mouse brain regions.
- The changes affected distinct synapse types and subtypes, with patterns related to protein turnover and brain connectivity.
- Environmental enrichment altered higher-order cortical connectivity after 10 weeks, while low-level neocortex showed no comparable remodeling.
Deeper Insight
The mouse brain kept its synapse count, its nerve-cell links, but changed its lineup. Experience can decide which signals get heard.
Give a mouse wheels, toys and company, then alter one eye’s input, and more than 100 brain regions reshuffle distinct synapse types, the links between nerve cells. The total count stays steady, but the cast changes. Experience may shape the brain by promoting some signals and sidelining others.
- What it could changeMapping synapse types could reveal why some brain regions adapt while others become vulnerable after injury or disease.
- How it touches todayThe environments around children, patients and older adults may shape brain function through selective changes we cannot yet see.
- Our futureA brain can keep its overall wiring while quietly changing which messages control the next move.
- Earlier research found experience-related changes in synapse number and morphology that remained well beyond the learning or exposure period.
- Enrichment sharpened synaptic nanoarchitecture and altered the dynamics of PSD95 assemblies and spine geometry in mouse cortex.
- Enriched experience increased reciprocal excitatory connectivity and altered inhibitory balance in higher-order mouse cortex, consistent with reorganized cell assemblies.
Sources · 6
- 5 Journals & institutions
- 1 News reporting
What do these mean?
- Journals & institutions. Published in a peer-reviewed journal, or from a university, government body, court or other institution.
- News reporting. Journalism: newspapers, magazines and news sites.
Featured · Primary source · pmc.ncbi.nlm.nih.gov
Experience-driven brain plasticity: beyond the synapse - PMC
Journal · peer-reviewed
Experience-driven brain plasticity: beyond the synapse - PMC # Experience-driven brain plasticity: beyond the synapse Julie A Markham 1, 2, ✉, William T Greenough Correspondence should be addressed to: Julie A. Markham, Ph.D., Beckman Institute, University of Illinois, 405 N. Matthews Avenue, Urbana
Read sourcePrimary source · science.org
Enriched experience increases reciprocal synaptic connectivity and coding sparsity in higher-order cortex
Journal · peer-reviewed
1 of 13 NEUROSCIENCE ## Enriched experience increases reciprocal synaptic connectivity and coding sparsity in higher-order cortex Rajat Saxena 1,2*, Justin L. Shobe 1, Aida M. Andujo 1, Wing Ning 1, Christelle Anaclet 3, Bruce L. McNaughton 1,4* The integration of new information during sleep reshap
Read sourcePrimary source · nature.com
Experience modifies the synaptome architecture in the developing and adult mouse brain | Nature Communications
Journal · peer-reviewed
Experience modifies the synaptome architecture in the developing and adult mouse brain | Nature Communications - Article - Open access - Published: 11 November 2026 # Experience modifies the synaptome architecture in the developing and adult mouse brain - Hanan Woods 1, 2, - Ülkü Günar ORCID: orcid.
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