Sunday July 22, 2018

Sleep spindles may help in improving memory retention

Also, the new understanding of the way the brain normally processes and strengthens memories during sleep may help to explain how that process may go wrong in people

0
//
40
Sleep spindles can help in memory retention. Pixabay
Brain's memory can be affected by Depression and Anxiety. Pixabay
Republish
Reprint
  • Sleep spindles can help in retaining new memories
  • These spindles are few seconds for oscillatory bursts
  • This can help in understanding cognitive processes of the human brain

Want to strengthen your cognitive skills regarding any relevant information? Sleep spindles can help you in retaining new memories related to any newly learned information when you sleep.

brain
This research can help in understanding human cognitive processes. Pixabay

Sleep spindles are half-second to two-second bursts of oscillatory brain activity — occurring during non-rapid eye movement sleep stages two and three — and measured in the 10 to 16 Hertz range on an electroencephalogram (EEG). Previous researches had shown that the number of spindles during the night could predict a person’s memory the next day.

“While it has been shown previously that targeted memory reactivation can boost memory consolidation during sleep, we now show that sleep spindles might represent the key underlying mechanism,” said Bernhard Staresina, post-doctoral student at the University of Birmingham.

“Thus, direct induction of sleep spindles — for example, via transcranial electrical stimulation — perhaps combined with targeted memory reactivation, may enable us to further improve memory performance while we sleep.”

For the study, published in the journal Current Biology, the researchers devised an experiment in which people learned to associate particular adjectives with particular objects and scenes.

Structure of brain can help find the causes behind epilepsy.
Sleep spindles can cause better memory.

Some study participants then took a 90-minute nap after their study session, whereas others stayed awake. While people napped, the researchers cued those associative memories and unfamiliar adjectives. The results showed that the memory cues led to an increase in sleep spindles. Interestingly, the EEG patterns during spindles enabled the researchers to discern what types of memories — objects or scenes — were being processed.

Also Reading: Sleep problems in menopause linked to hot flashes, depression

“Our data suggest that spindles facilitate processing of relevant memory features during sleep and that this process boosts memory consolidation,” he said. Also, the new understanding of the way the brain normally processes and strengthens memories during sleep may help to explain how that process may go wrong in people with learning difficulties, the researchers added. IANS

Click here for reuse options!
Copyright 2018 NewsGram

Next Story

Hot Dorm Rooms Could Affect Students’ Memory

Extreme heat exposure is the biggest killer of all climate phenomena in the United States, killing 7,000 people between 1999 and 2010

0
FILE - Students surf the internet in their dorm room at Wesleyan University in Middletown, Conn., April 24, 2008.
FILE - Students surf the internet in their dorm room at Wesleyan University in Middletown, Conn., April 24, 2008. (VOA)

Is your dorm room stifling hot? That might impact your memory.

New research shows that heat can affect even healthy young adults intellectually, with worse cognitive performance observed in students who slept in a non-air-conditioned room during a heat wave.

Researchers from Harvard University recruited 24 students who slept with air-conditioning and 20 who slept in rooms without AC before, during and after a Boston-area heat wave.

They recorded temperature, relative humidity, carbon dioxide and noise in each bedroom throughout the study.

The indoor temperature of the non-air-conditioned dorm averaged 26.3 C (79.3 F) compared with 21.4 C (70.5 F) in the dorm with air-conditioning.

Each participant wore an activity monitor to measure heart rate, perspiration and sleep quality. When the students woke up each morning, they were tested for how quickly and accurately they completed two cognitive tests that measured memory and reaction.

Researchers also noted how much water and caffeine the students consumed, and how long they spent outdoors each day.

After 12 days, researchers were surprised by the data.

The dorms without AC were louder at night because of fan and street noise, which could have disrupted sleep.
The dorms without AC were louder at night because of fan and street noise, which could have disrupted sleep. Pixabay

“We found very significant effect of detrimental cognitive function among those students that didn’t have air-conditioning during this heat wave period,” said lead author Jose Guillermo Cedeno Laurent of the Harvard T.H. Chan School of Public Health.

The students who didn’t have air-conditioning performed significantly worse on the basic cognitive tests. In particular, going without AC during a heat wave hurt their reaction time when they had to make quick judgments.

“Their study really demonstrated that exposure to heat can have all these potential effects on people’s daily activities,” said Daisy Chang, an organizational psychologist at Michigan State University in East Lansing.

“A whole host of reasons could potentially explain this exposure effect,” Chang noted. “It’s not necessarily directly exposure to heat. [The heat] could have affected their sleep quality so they’re less rested, they have less energy, or mental resources, or ability to focus.”

Also Read: Music lessons boost children’s memory and grades

The dorms without AC were louder at night because of fan and street noise, which could have disrupted sleep.

And while air-conditioned rooms can hold higher levels of carbon dioxide, which can have a negative impact on cognition, the students slept better in a cooler room.

“We find that heatwaves are impacting us all,” Cedeno said. “These … extend to those like the young and healthy university students. And that we find significant effects on the way they think – their cognitive functions.”

Extreme heat exposure is the biggest killer of all climate phenomena in the United States, killing 7,000 people between 1999 and 2010. Previous research focused on how hot weather affects at-risk populations like the elderly and the very young. And 2016 was the hottest year on record for the past 200 years. (VOA)