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The memory can rejuvenate with electrical stimulation


Thanks to the transcranial stimulation, researchers have allowed people over 60 years to find a "work memory" for young people. This new study suggests that brain aging could be alleviated by stimulating the brain electrically.

"These results could serve as a starting point for future actions on the program cognitive decline related to age & # 39;, according to US researchers who published their work in the magazine Nature Neuroscience.

the work memory It is a short-term memory. It does not remember past events, but it is what, for example, allows you to keep in mind the numbers of a phone number that is being recorded. It is believed that this form of memory is related to two types of brain waves, gamma and theta waves, in two regions of this complex organ.

Researchers Robert Reinhart and John Nguyen studied 42 adults between 20 and 29 years, and 42, 60-76 years old, who performed work-related exercises (for example, identifying differences between presented images at intervals of seconds). A helmet was used for electrodes to evaluate how the famous waves interact in this process. Always by means ofelectrodes, they stimulated the brain Some of the participants modulating the rhythm of the waves.

An effect on waves present in certain areas of the brain

Without that stimulusthe oldest subjects were slower and less successful. But with him stimulus, his performances were close to those of the youngest, an effect that lasted more than three quarters of an hour. These improvements were related to stronger interactions between theta and gamma waves in the escort storm left and a stronger synchronization of theta waves between the left temporal lobe and the prefrontal cortex.

Independent experts, who did not participate in the study, welcomed "Interesting job" They can contribute to a better understanding of age-related cognitive impairment. However, they have identified certain limits. First of all, the oldest subjects included in the study had good health and did not affect any of them dementia com Alzheimer's. "More research is crucial to find out if this type of approach can ultimately benefit patients with dementia", commented the Dra. Sara Imarisio, from the British Association Alzheimer Research UKquoted by the Science Media Center.

Besides, "There is no evidence that the type of improvement achieved through this stimulation can make a real difference in everyday life", added Dr. Vladimir Litvak, of theUniversity College from London.

What to remember

  • The researchers tested the work report of young people over 60 years of age.
  • They applied transcranial electrical stimulation.
  • The actions of the elderly are closer to those of the young people.

The memory could be improved by using electrical stimulation

Article from Marie-Céline Ray Posted on September 9, 2014

Applying magnetic pulsations that induce a electric current on the page skullThe researchers have improved the performance of the memory of volunteers. A discovery that allows to consider a no invader for memory problems, either a AVC or a Alzheimer's disease.

the memory operation It is a complex mechanism that requires collaborative work between different regions of the brain. To coordinate all this, you need an orientation director, a role that plays theSeahorse. For this reason, its stimulation could promote memorization. It is still necessary to be able to access this region located in the depths of the brain …

In an article published in scienceResearchers from the Northwestern University of Chicago report encouraging results for a non-invasive method: TMS or transcranial magnetic stimulationwhich involves stimulating a region of the brain by delivering an electric current through magnetic pulsations.

Sixteen healthy adults, aged 21 to 40, participated in this experiment. Thanks to theRM, investigated the researchers Detailed anatomical image of the brain Identify the brain network of everyone's memory. In fact, regions involved in memory They vary from one individual to another. Since it is not possible to directly stimulate the hippocampus, given its position in the brain, theRM It allowed researchers to identify a surface region connected to the hippocampus. They wanted to know if the stimulation directed at this point could request the hippocampus and improve the performance of the memory of the participants.

Improved memory capacity

The participants spent one memory test which consisted of to learn a series of associations between faces and words. They then received a brain stimulation for 20 minutes a day for 5 days. During the week, other tests of magnetic resonance and memory were performed with new face-to-face associations. At least seven days later the same experiment was repeated, but with false stimulation placebo. His order was invested for half of the participants. They did not know in what order they followed the experience.

It became clear that the participants were doing better memory tests after the brain stimulation before. It was necessary three days of encouragement to see improvements. The electrical stimulation helped better synchronize the regions of the brain to work together, allowing one of the authors, Joel Voss, to make the following comparison: "It's like replacing his usual director with Muti", in reference to the famous director of the orchestra Riccardo Muti.

This discovery opens up the possibility of treating different memory problems, whether they are caused by AVCAlzheimer's disease in the initial phase, brain trauma, cardiac arrest or aging. The advantage of this method is that it is not used surgery neither medicine.

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