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For decades, the prevailing dogma in neuroscience held that the human brain was an immunological fortress, a "closed system" largely insulated from the immune defenses operating throughout the rest of the body. Protected by the formidable blood-brain barrier—a specialized network of vessels that restricts the movement of substances and cells from the bloodstream into the…
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For generations, the scientific community has operated under a foundational assumption: the brain is a single, unified organ that shares a common developmental origin. Whether considering the complex architecture of the human forebrain or the rhythmic, life-sustaining mechanisms of the hindbrain, the prevailing model suggested that all these regions traced their lineage back to a…
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For decades, the central dogma of neurobiology has held that the brain is an immunologically privileged site—a sequestered, closed system shielded by the blood-brain barrier. Under this long-standing model, the brain’s specialized immune cells, known as microglia, were thought to be established during embryonic development and to remain a self-sustaining, isolated population throughout an individual’s…
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For decades, the central dogma of developmental neurobiology has held that the human brain is a monolithic entity—a single, unified organ arising from a common pool of progenitor cells. Under this established model, the forebrain, midbrain, and hindbrain were thought to trace their lineage back to the same developmental starting point, evolving in tandem as…
