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Scientists uncover a hidden messaging network in the brain

So, a tiny group of brainstem cells called the locus coeruleus may be doing far more than broadcasting one general signal. In mice, researchers found that its nerve cells send norepinephrine along distinct pathways to different parts of the nervous system. Cells projecting toward the cortex were active during learning, while those sending signals downward appeared to influence whether mice responded to opportunities around them. This new map could help researchers develop more targeted approaches to conditions such as depression, anxiety, ADHD, and Alzheimer’s disease.
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