A rogue neuronal signal may lie at the root of Alzheimer's disease

What if amyloid plaques are not the whole story of Alzheimer's disease? New research suggests that a broad range of Alzheimer's pathologies may be orchestrated by a molecular switch called ERBB4 when it turns on in the wrong neurons. Once activated, this misplaced signal can set off a chain reaction that disrupts brain circuits, eliminates synapses, activates glial cells, increases amyloid pathology and impairs memory.

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