The impact of REM sleep loss on human brain connectivity.

Brain function is vulnerable to the consequences of inadequate sleep, an adverse trend that is increasingly prevalent. The REM sleep phase has been implicated in coordinating various brain structures and is hypothesized to have potential links to brain variability. However, traditional imaging research have encountered challenges in attributing specific brain region activity to REM sleep, remained understudied at the whole-brain connectivity level.

Hyper-excitability of corticothalamic PT neurons in mPFC promotes irritability in the mouse model of Alzheimer's disease.

Neuropsychiatric symptoms in patients with Alzheimer's disease (AD) are presented as early as the mild cognitive impairment (MCI) stage. However, it remains unclear whether separate neuronal populations encode distinct aspects of the neuropsychiatric symptoms and drive them differently. Here, we report that pyramidal tract (PT) neurons projecting to the thalamus, but not to the pons or medulla, in the medial prefrontal cortex (mPFC) of the mouse model of AD show increased excitability, which is associated with increased irritability and aggressivity.