Neurons that are activated by the chemical messenger serotonin have a complex relationship to sleep-wake behaviors. That much is clear from past research, although the way the abundant…
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People with depression and a type of excessive sleepiness called hypersomnolence sleep for longer periods than healthy individuals, but sleep just as well, according to a February 1 study in the…
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New experiments show that brain cells called VTA dopaminergic neurons are directly responsible for causing and maintaining wakefulness in mice. When these neurons are active, they create wakeful…
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