How brain ripples help support working memory
Research from scientists at the University of California San Diego School of Medicine and collaborators has shed new light on how the human brain coordinates working memory, the process in which the brain encodes information for immediate or short-term use.
Scientists at the University of California San Diego have discovered that high-frequency brain waves called ripples may help coordinate distant brain regions during working memory tasks. Working memory is crucial for daily activities such as following instructions and remembering information from conversations. The study, published in Nature Neuroscience, revealed that ripples increase throughout all stages of working memory, from encoding to retrieval.
When ripples occur simultaneously in different brain regions, neurons in those areas are 30% more likely to fire together, even across distances of up to 8.7 inches. This coordination appears to strengthen as the memory load increases during the task. During retrieval, co-ripples help the brain recreate the patterns of neuron firing used to form the initial memory.
The findings suggest that ripple oscillations could serve as a mechanism for long-range neural communication, potentially offering insights into memory-related brain networks in both healthy individuals and those affected by neurological disorders.
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