"Relaxing Words in Sleep Slow Heart Rate: The Key to Deeper Rest"

A study by researchers from the University of Liège and the University of Fribourg reveals that hearing relaxing words during sleep slows down the heart rate, indicating a deeper state of sleep compared to neutral words. The study suggests a connection between bodily states and cognitive processes, emphasizing the importance of considering both brain and body information for a full understanding of how we think and react to our environment. The findings highlight the unique information about sleep functions that cardiac activity provides, beyond what can be captured by brain markers alone, and call for further exploration of the role played by the heart in other sleep functions.