Connect with us

Hi, what are you looking for?

Jewish Business News


What Really Controls How Deeply We Sleep?

A new study at Tel Aviv University discovered why during good, deep sleep, we rarely respond to external stimuli sounds unless they are strong enough

What Really Controls How Deeply We Sleep?
Have ever thought why during good, deep sleep, we rarely respond to external stimuli sounds unless they are strong enough like an alarm clock, or meaningful, like a baby’s cry, which wakes us up?

We differ in how easily we wake up: Deep sleepers can sleep through just about anything. In contrast, light sleepers wake up from every faint sound. We all can have dramatic changes in our sleep quality during periods of stress. Being able to sleep continuously in the face of sounds is critical for our health and well-being.

A new study by Prof. Yuval Nir and his team at Tel Aviv University explored the reasons and discovered a tiny region in the brainstem called the locus coeruleus, which secretes the chemical noradrenaline throughout the brain, is a key to determine how deeply we sleep.

Please help us out :
Will you offer us a hand? Every gift, regardless of size, fuels our future.
Your critical contribution enables us to maintain our independence from shareholders or wealthy owners, allowing us to keep up reporting without bias. It means we can continue to make Jewish Business News available to everyone.
You can support us for as little as $1 via PayPal at
Thank you.

The study published in the journal Science Advances finds that noradrenaline, which is produced in response to stress, is the heart of our ability to “shut off” our senses and sleep soundly.

The average healthy situation is for noradrenaline activity to be silent and minimal during sleep. When noradrenaline activity is high, we wake up more frequently, even from low-volume sounds.

“The ability to detach from the environment, in a reversible way, is a central feature of sleep,” explains led research TAU doctoral student Hanna Hayat of Prof. Nir’s lab, “Our findings show that the locus coeruleus noradrenaline system plays a central role in this disconnection by keeping a very low level of activity during sleep.”

“Sleep disruptions are a major health issue and are frequent in aging, as well as in neurological and psychiatric disorders,” concludes Prof Nir. “It is important to test if our findings on varying noradrenaline levels can explain hyperarousal that characterizes conditions such as anxiety disorders and PTSD and if so, to build on these findings to develop novel methods to improve sleep quality.”



You May Also Like

World News

In the 15th Nov 2015 edition of Israel’s good news, the highlights include:   ·         A new Israeli treatment brings hope to relapsed leukemia...


The Movie The Professional is what made Natalie Portman a Lolita.


After two decades without a rating system in Israel, at the end of 2012 an international tender for hotel rating was published.  Invited to place bids...

VC, Investments

You may not become a millionaire, but there is a lot to learn from George Soros.