A new mouse study suggests the brain’s memory center isn’t a “blank slate” at birth. Instead, it begins with an unusually dense network of connections that are gradually pruned into more precise circuits as the brain matures. Early brain networks are highly active but less specific, making it difficult to form clear, long-lasting memories. This may help explain why most people remember very little from infancy and early childhood, a phenomenon known as infantile amnesia. The findings reveal how the developing brain refines its wiring over time, laying the foundation for the accurate and stable memories we form later in life.
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