Human and mouse brains share basic layers but differ in cell interactions
In short: Researchers used a high-resolution imaging technique called MERFISH to map the cellular landscape of the human and mouse cerebral cortices. By profiling thousands of genes across the brain, they identified over 100 distinct cell populations. The study found that while both species share a similar basic layered structure in their cortex, they differ significantly in how their individual cells interact with one another.
The study provides a molecularly defined atlas of the human temporal gyrus, highlighting how cellular diversity is organized in the brain. It reveals that human brains have a much higher frequency of interactions between neurons and non-neuronal cells compared to mice.
The researchers used MERFISH to capture spatial data at a single-cell level. However, because the study compares different species and relies on spatial proximity as a proxy for interaction, it provides an indirect view of how these cells communicate.
Why it matters: Understanding how our brain's cellular architecture differs from other species helps clarify the unique complexity of human neural organization.
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