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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
The paraventricular thalamus is a critical thalamic area for wakefulness.
Science 2018 October 27
Clinical observations indicate that the paramedian region of the thalamus is a critical node for controlling wakefulness. However, the specific nucleus and neural circuitry for this function remain unknown. Using in vivo fiber photometry or multichannel electrophysiological recordings in mice, we found that glutamatergic neurons of the paraventricular thalamus (PVT) exhibited high activities during wakefulness. Suppression of PVT neuronal activity caused a reduction in wakefulness, whereas activation of PVT neurons induced a transition from sleep to wakefulness and an acceleration of emergence from general anesthesia. Moreover, our findings indicate that the PVT-nucleus accumbens projections and hypocretin neurons in the lateral hypothalamus to PVT glutamatergic neurons' projections are the effector pathways for wakefulness control. These results demonstrate that the PVT is a key wakefulness-controlling nucleus in the thalamus.
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