United StatesNew research published in a scientific journal explores why some individuals can sleep through loud noises. The study, conducted by researchers at the University of Lausanne and the University of Geneva, used EEG to examine brain activity in 25 healthy adults during wakefulness and different stages of REM sleep. Participants were exposed to tones and their heartbeats, revealing that the brain's response to external sounds weakens as they transition into REM sleep, while responses to internal bodily signals like heartbeats remain strong or increase. This shift indicates a change in focus from 'exteroception', processing external stimuli, to 'interoception', awareness of internal bodily signals. The study introduces an 'audio-cardio index' to quantify this shift, suggesting that the brain selectively reduces attention to external sounds while maintaining awareness of internal signals crucial for survival.
Bias read (Center): The article presents a scientific study without overt ideological framing. It focuses on neurological mechanisms and uses objective language to describe findings. There is no indication of partisan bias or selective emphasis on specific viewpoints. The tone remains neutral and factual, aligning with
