Mouse Study Ties Infancy Memory Loss to CA3 Circuit Pruning After Birth
Updated
Updated · qazinform.com · Jul 18
Mouse Study Ties Infancy Memory Loss to CA3 Circuit Pruning After Birth
2 articles · Updated · qazinform.com · Jul 18
Summary
Researchers found newborn mice form memories in a densely connected, largely random CA3 hippocampal network that later gets pruned into a smaller, more organized system.
Single neural connections in newborns were often enough to trigger activity, but mature brains needed input from multiple connections, making memory coding more selective and less overlapping.
Computer simulations showed that the shift from dense, highly excitable circuits to sparser structured ones improves memory storage and retrieval efficiency.
The findings suggest infant memories may fade because early experiences are encoded in broad, overlapping activity patterns, while later pruning helps create more distinct and stable memories.