A wardrobe with multiple storage is known, but our brain having multiple storage is new. In the latest research, it is known that the brain keeps at least three separate versions of every memory, challenging the old belief that only one adjustable version existed.
The study, conducted on rodents, focused on the hippocampus, a key part of the brain for memory and learning. Scientists found that neurons in this area create multiple versions of a memory, each with different levels of strength and stability. This discovery helps explain how and why our memories can change over time.
Different neurons play different roles in this process. Neurons that develop early make the first long-term memory copy, which starts weak but becomes stronger over time. Then, neurons that form later create a more stable version of the memory. Finally, the neurons that develop last create a memory that is initially strong but fades faster. This suggests that the brain is naturally equipped to handle the evolution of memories as we age and learn new things.
The study sheds light on how complex memory formation is within the hippocampus. Early-developing neurons are crucial for long-term memory retention, creating a fundamental copy for lasting recollection. Mid-stage neurons contribute to the stability of these memories, while late-developing neurons, although initially strong, allow memories to be more flexible and changeable based on new information or experiences.
These findings have important implications for understanding and treating memory-related disorders. For example, in cases of PTSD, where traumatic memories are disturbing and hard to forget, treatments could focus on the late-developing neurons to reduce the emotional intensity of these memories. On the other hand, for conditions like dementia, enhancing the activity of early-developing neurons could help strengthen memory retention and potentially slow memory decline.
Knowing how different groups of neurons contribute to memory storage could lead to new treatment options. By specifically targeting the type of neuron that encodes a memory, future therapies might be able to either enhance memory retention or modify distressing memories.
This research not only changes our understanding of how memories are formed and stored but also opens up new possibilities for developing treatments to manage memory-related disorders more effectively.
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