Last Updated : Jul 15 2019 11:13PM     Screen Reader Access
News Highlights
Lok Sabha passes NIA (Amendment) Bill 2019            HD Kumaraswamy govt in Karnataka to face confidence motion on Thursday            FM Nirmala Sitharaman calls upon youth to take advantage of govt schemes            Flood situation in Assam remains critical along with other North Eastern states            China GDP growth slows to 6.2 pc, weakest in 27 years           

May 16, 2019
2:22PM

Brainwaves during sleep strengthen memories: Study

Representational pic
In a study, researchers from Concordia University in Canada and the University of Liege in Belgium have found that Brainwaves produced during sleep helps us to store new information in our memory which helps boost learning. 

The study, published in the journal NeuroImage, shows how learned information turns into reliable memories during sleep.

Brainwaves -- specifically, ones called sleep spindles, are fast bursts of electrical activity produced by neurons mainly during Stage 2 sleep, prior to deep sleep.

Using medical imaging machines, researchers were able to assess brain activity related to these waves. 

Thanh Dang-Vu, Associate Professor at Concordia University said, it's hypothesised that sleep spindles play an important role in transferring information from the hippocampus to the neocortex. This has the effect of increasing the strength of memories. 

To get the images they needed, the team used both electroencephalography (EEG) and functional magnetic resonance imaging (fMRI). 

They applied these tools to a group of student volunteers during and after a lab-based face-sequencing task. The students were shown a series of faces and asked to identify the order in which they were shown. 

The researchers scanned them while they were learning the faces, while they were asleep and again when they woke up and had to recall the sequences.

They then came back every day for a week and repeated the task without being scanned. After a week had elapsed, they had memorised the task, and were once again scanned during sleep and asked to recall the sequences.

The researchers found that during spindles of the learning night, the regions of the brain that were instrumental in processing faces were reactivated. 

They also observed that the regions in the brain involved in memory -- especially the hippocampus -- were more active during spindles in the subjects who remembered the task better after sleep.

Researchers said that this reactivation during sleep spindles of the regions involved in learning and memory falls in line with the theory that during sleep, memories are strengthening by transferring information from the hippocampus to the regions of the cortex that are important for the consolidation of that specific type of information.

   Related News

Live Twitter Feed

Listen News

Morning News 15 (Jul) Midday News 15 (Jul) News at Nine 15 (Jul) Hourly 15 (Jul) (2300hrs)
समाचार प्रभात 15 (Jul) दोपहर समाचार 15 (Jul) समाचार संध्या 15 (Jul) प्रति घंटा समाचार 15 (Jul) (2305hrs)
Khabarnama (Mor) 15 (Jul) Khabrein(Day) 15 (Jul) Khabrein(Eve) 15 (Jul)
Aaj Savere 15 (Jul) Parikrama 15 (Jul) Lok Ruchi Samachar 14 (Jul)

Listen Programs

Market Mantra 15 (Jul) Samayki 15 (Jul) Sports Scan 15 (Jul) Spotlight/News Analysis 15 (Jul) Samachar Darshan 14 (Jul) Radio Newsreel 15 (Jul)
    Public Speak

    Country wide 11 (Jul) Surkhiyon Mein 11 (Jul) Charcha Ka Vishai Ha 10 (Jul) Vaad-Samvaad 9 (Jul) Money Talk 9 (Jul) Current Affairs 12 (Jul)