Researchers at Washington University School of Medicine in St. Louis have upended the decades-old dogma of how connections between brain cells are rearranged during states of heightened vigilance or attention. The team found that a brain chemical associated with alertness, attention and learning alters brain connectivity and function not by acting directly on neurons, the cells known for their quick transmission of information, but through the work of astrocytes, another, slower-acting type of brain cell that is often overlooked in the field of neuroscience.
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