In a recent study, it has been noted that mild voice stimulation synchronized to the rhythm of the brain waves - such as the waterfall sound - has improved the ability to remember words, while deep sleep has become very important in the elderly.
Deep sleep has a very important role in memory strengthening. But starting from middle ages, deep sleep is seriously diminished. Scientists believe that it also causes age-related memory loss.
The stimulation of voice stimulated deep sleep and memory test success in the participants.
Dr Phyllis Zee, a professor of neurology at the Northwestern University School of Medicine, said: "This is a safe approach that can improve brain health without requiring simple, simple and medical practice. It is a very powerful tool to strengthen the memory of the elderly and to reduce age-related memory loss. "
The study was published on 8 March at Frontiers in Human Neuroscience.
Participants at ages 60 and over received 1 night of acoustic stimulation and 1 night of artificial stimulation in the study. The artificial stimulation method was the same as the acoustic one. But the participants did not hear anything during sleep. Participants resolved a memory test at night and in the morning for both artificial and acoustic stimulation sessions. In the morning after artificial stimulation, the ability to remember the test was slightly increased. But the average improvement after pink noise stimulation was three times higher.
The slow wave sleep augmentation rate was associated with the memory improvement rate. This shows that slow wave sleep is important for memory; Even in old age.
Scientists in Northwestern have not worked on the effects that have arisen on recurring nights. But this method can be a viable intervention at home in the long run.
Previous research has shown that acoustic stimulation during sleep can be beneficial for memory impairment in young people. But this was not tried on the elderly. This new study targets older individuals.
The research has taken a new approach: it reads the brain waves of the individual in real time and locks them into mild auditory stimulation during prominent neuronal communication during sleep.
Each brain wave or oscillation slows down by about 1 oscillation in the morning during deep sleep, while 10 vibrations a second during waking.
Giovanni Santosi has developed an algorithm that propagates the voice in an increasing fraction of the slow wave oscillation. This stimulation increases synchronization in the activity of neurons.
After the stimulation of the voice, the slow waves of the elderly participants increased during sleep.
Zee: "More work is needed to confirm the effectiveness of this method. After that, it can be said that people can apply this method at home. We want to move this further. "
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