An exam ends, a presentation is over, a tense conversation is done, and the body still hasn’t hit the brakes. That is how the Institute of Psychology of the Chinese Academy of Sciences opens its account of a new study (in Chinese), and it is the moment the study set out to measure: whether relaxing music helps once the stress is over.
The team, led by Yi Du, found that relaxing music helped 120 healthy young adults recover from a stressful mental arithmetic test better than recordings of flowing water and rain. With music, mood picked up more, heart rate fell further and the skin’s electrical activity settled faster, the institute says. Listening before the test did not noticeably blunt the stress itself.
The results were published online Sept. 8 in the Proceedings of the National Academy of Sciences. The first author is Siqi You, a former postdoctoral researcher in Du’s group.
Before the stress or after it
The study had two experiments. In the first, people listened to relaxing music or to the water sounds either before or after the arithmetic task, according to the academy’s English-language announcement. That let the researchers separate two questions: whether music softens the blow, and whether it speeds the recovery.
The answer was the second. “Music is a highly structured signal that unfolds through cycles of anticipation, tension, and resolution,” Du said in the announcement. “Our findings suggest that the brain may use this evolving structure as a scaffold to reorganize its stress-regulation networks, helping both the mind and body return to a more balanced state.”
The researchers tracked mood, autonomic activity such as heart rate and skin conductance, stress hormones and, in the second experiment, brain activity, the institute says. Its account and the paper’s summary report music’s advantage for mood, heart rate and skin conductance. Neither says what the hormone measurements showed.
Both sounds helped
The water sounds were not a dummy condition. Both kinds of sound came with recovery, the institute’s account says, and music showed extra benefits at certain stages. The paper’s own summary calls the water recordings “an active natural sound control.”
So the finding is that music beat another calming recording, not that it beat silence. It compared one set of recordings with another and does not show that music works better than every nature recording or outdoor experience.
What the scanner showed
In the second experiment, a different group lay in an MRI scanner while recovering from the same kind of stress. The researchers looked at how the auditory cortex, which handles sound, communicated with the insula and the thalamus, regions involved in monitoring the body’s state and regulating arousal.
Compared with the water sounds, music strengthened the directional influence of the auditory cortex on the insula early in recovery, according to the paper’s summary and the academy, using a method called dynamic causal modeling. Later, communication between the insula and the thalamus increased. The more the link between the right insula and the thalamus strengthened, the more a participant’s positive mood improved, the institute says.
The academy’s headline says music “reorganizes” the brain. In the study that means a change in how regions communicate during recovery, what the paper’s title calls “functional reorganization.” It did not look at lasting changes in the brain’s physical wiring.
Tension and release
Music differs from rain or a stream because it builds and resolves expectations over time, the institute explains. A melody that hasn’t returned to a stable note leaves a listener hanging, and the resolution feels like landing. Researchers call that build and release musical tension.
As the music played, activity in the superior temporal gyrus on both sides of the brain rose and fell with the tension and pleasure listeners perceived. The shifting connections among the auditory cortex, insula and thalamus tracked the tension, and those network changes were linked to recovery in negative mood, heart rate and heart rate variability, according to the institute.
What the public account leaves out
The full paper is not freely available. Neither announcement says how the 120 participants were split between the two experiments, which pieces of music were played or for how long, and neither gives the size of the improvements. The authors have posted their data, code and materials on the Open Science Framework, the paper says.
The participants were healthy young adults facing a short laboratory stressor. The study does not show that music treats long-term stress, or that every listener and every piece of music would work the same way.
The academy says the findings offer a possible framework for designing music-based approaches to stress resilience “in everyday life and clinical care.” The institute puts it more simply. Music, it says, works less like a mute button pressed when the alarm goes off and more like a reset once the alarm has stopped.
Photo: Vu Hoang / Wikimedia Commons (CC BY 2.0)
