Link between obesity and sleep loss

Can staying up late make you fat? Researchers found the opposite to be true when they studied sleep in worms: It’s not the sleep loss that leads to obesity, but rather that excess weight can cause poor sleep. Source

Babies retain even detailed events during a nap

While sleeping the brain goes through previously experienced things, consolidates new memory contents and summarizes similar experiences into more general knowledge. This also applies to babies. However, they can more than just generalize what they have learned. A recent study shows: during sleep a baby’s brain also consolidates the details of its individual experience and protects them from generalization and is therefore also important for what is known as episodic memory. Source

To sleep deeply: The brainstem neurons that regulate non-REM sleep

Researchers identified neurons that promote non-REM sleep in the brainstem in mice. These neurons commonly expressed the gene that encodes the neuropeptide neurotensin. Activation of these neurons induced non-REM sleep. Moreover, direct administration of neurotensin into the ventricle induced NREM sleep-like brain activity. These findings contribute to our understanding of sleep promotion and sleep disorders, and could tell us more about the evolution of sleep architecture in mammals. Source