Mouse Study Finds Memories Survive 50% Synapse Loss Through Network Patterns
Updated
Updated · Livescience.com · Aug 13
Mouse Study Finds Memories Survive 50% Synapse Loss Through Network Patterns
3 articles · Updated · Livescience.com · Aug 13
Summary
More than half of hippocampal synapses disappeared within 24 hours of artificial hibernation, yet mice still remembered a shock-linked setting and food locations after two days.
Science-published work led by Kazumasa Tanaka found memory persistence tracked with preserved connectivity patterns—resilient synapse hubs and clustered dendritic spines—rather than individually strong neuron-to-neuron links.
A comparison group under long-term anesthesia also lost synapses, but their memories faded when those clustered structures were disrupted, pointing to network architecture as the key difference.
The findings challenge a simple view that long-term memory depends mainly on strengthened individual synapses and suggest the brain stores information in higher-level organization that can survive heavy pruning.
Researchers now plan molecular studies of those clusters and say the work could inform both neuroscience and data-storage system design.