Why the brain "discards" important memories, but retains "random" events and its link with brain health

Why do some memories are strangely vivid, while some seem to be blurry? For ages, the memory-mystery puzzled research ers, but now, a new research conducted at Boston University has shed light on this intriguing phenomenon. The study reveals that the brain prioritizes certain experiences based on their emotional significance and the process behind it, as scientists have named it, is ‘ memory enhancement ’.
The study on memory enhancementThe study involved around 650 participants across ten experiments. The research reveals that the brain selectively strengthens those memories that occur near emotionally significant events, and this process is known as memory enhancement. In other words, the brain uses emotional events to stabilize fragile memories, to make them more accessible in the future.

The research shows that emotional events trigger changes in brain activity, and as a result stabilize nearby fragile memories. The study revealed a principle called graded prioritization. As per the research, memories after an emotional event are strengthened depending on how powerful the event was. Similarly, memories before an event are rescued if they share similarities like matching color or themes.
Implications from the study for daily life and learning The research’s insights go far beyond labs. The lead researcher of the team believes that the discovery has broad implications for both theory and practice.

• Therapies related to memory disorders

Scientists believe that emotional cues may be used to rescue fading memories in people with age-related memory decline. The study gives a potential to future applications in the field of healthcare to enhance memory-enhancing interventions.

• Learning and education

Fragile concepts could be better understood if they are associated or paired with emotionally engaging materials. Students could be assigned lessons that weave in emotional hooks.


The mystery of why some memories stick while others fade is being unraveled, and this research suggests that memory isn’t as random as it was thought, it is selective and strategic. This mechanism can provide a wide range of implications in the field of healthcare and education. In essence, the memories our brain chooses to remember are those linked to emotional events.