PsyPost reports:

A new study sheds light on how our brains rhythmically organize memories at the level of individual nerve cells. Researchers in Germany have found that single neurons in the human medial temporal lobe tend to synchronize their activity with slow brain waves, particularly during memory formation and retrieval. These patterns, known as theta-phase locking, appear to reflect an internal rhythm that helps structure cognitive processes. The findings were published in Nature Communications.

The study, led by neuroscientists at the University Hospital Bonn, the University of Bonn, and the University of Freiburg, examined how single-neuron activity in the human brain aligns with local electrical rhythms during memory tasks. The team focused on theta waves—slow oscillations typically occurring between 1 and 10 Hz—which have long been associated with memory processes in animal research. While studies in rodents have shown that hippocampal neurons often fire at specific phases of the theta rhythm, it has remained unclear whether similar dynamics hold in the human brain during real-time memory use.

“In the Bonn Spatial Memory Lab, we study how the brain forms memories about places and locations. Previous research showed that single brain cells can synchronize with rhythmic brain activity. We wanted to understand this synchronization more deeply and explored its role during both learning and remembering of spatial memories,” explained Tim Guth of the University of Bonn. “Our goal is to understand the memory system of the brain at the level of individual cells and populations of cells. Ultimately, we hope to help improve the treatment of memory disorders.” [Continue reading…]