Alzheimer’s targets brain cells that help people stay awake

The new finding could fundamentally refocus dementia research

nerve cells

SLEEPY TIME In part of a human brain stem, a healthy nerve cell (red, left) releases a chemical messenger involved in wakefulness. Nearby, a nerve cell (brown, right) packed with tau, a protein tied to Alzheimer’s, is too damaged to work properly.

L. Grinberg

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