Memory is a mysterious phenomenon. Some life events remain sharp in our memories no matter how long ago they occurred, while details from the previous day can quickly fade away.
A recent study published in the journal Science has uncovered the mechanism behind this phenomenon. Researchers have identified a system in the brains of humans and other mammals that determines which experiences are significant enough to be stored in long-term memory and which are forgotten.
Experiments conducted on mice demonstrated that specific patterns of brain activity called “sharp ripples” in the hippocampus, the area responsible for memory formation, occur during wakefulness. These patterns act as tags for important experiences, which are then transferred to long-term memory during sleep.
Although the study was carried out on mice, the lead author, Dr. Johnson, believes that the findings are applicable to humans as well, given the similarities in certain brain processes across mammalian species.
György Buzaki, the Biggs Professor of Neuroscience at New York University Langone Health, emphasized the unconscious nature of this memory consolidation process.
In the study, mice were rewarded with a treat after successfully navigating a maze, while their brain activity was monitored using implanted electrodes. The researchers observed that specific brain activity patterns observed during wakefulness were replayed during sleep, facilitating the conversion of important experiences into long-term memories.
This process highlights the crucial role that sleep plays in memory formation, as experiences deemed important during waking hours are transformed into lasting memories during rest.
According to the researchers, experiences that do not trigger the formation of sharp ripples are less likely to be stored in long-term memory.
To enhance the likelihood of memory retention, Dr. Buzaki suggests taking breaks after significant experiences to allow for the consolidation of memories.
Long-term memory requires relaxation
Research indicates that intentional pauses after experiences can aid in the formation of long-term memories. Dr. Buzaki recommends engaging in relaxing activities post-experience to facilitate the creation of sharp ripples in the brain, a process crucial for memory storage.
For example, after watching a movie, going for a leisurely walk can enhance the chances of remembering the film, as it allows for the encoding of memories.
Dr. Daniela Schiller, a professor of neuroscience and psychiatry at Icahn School of Medicine, highlighted the study’s intriguing discovery regarding brain activity patterns during rest and their resemblance to real-life experiences.
Dr. Daphna Shohamy, director of the Zuckerman Institute at Columbia University, emphasized the importance of pauses and bursts of brain activity in memory formation, noting that these elements enhance the likelihood of experiences being stored in long-term memory.
In conclusion, the study provides valuable insights into the unconscious mechanisms behind memory formation and underscores the significance of rest and relaxation in preserving lasting memories.
Source: www.nbcnews.com
