How an Experiment with Rodents Indicates the Music That Physically Effects

Music is all around us, and many people wonder not just how it affects our emotions, but whether it can have physical impacts on living systems. A scientific review of dozens of experimental studies with rodents offers intriguing evidence that music does more than entertain: it can influence brain chemistry, behavior, immune function, and even physiological processes like blood pressure. This research helps open the door to understanding how sound might affect living organisms and even guide future studies in humans. 

The first major takeaway from the rodent research is that music exposure appears to change brain structure and neurochemistry. Across multiple studies, rodents that listened to music showed higher levels of brain-derived neurotrophic factor (BDNF), a molecule linked to brain plasticity, learning, and memory. Music was also tied to increased neurogenesis and more complex neural cell structures in certain brain regions. These changes paralleled improvements in learning tasks and spatial memory in the animals. 

Beyond the brain, music seemed to influence behavior in meaningful ways. Rodents exposed to musical pieces exhibited less anxiety-related behavior and performed better on tests involving learning and cognition compared with those in control conditions. These behavioral shifts suggest that auditory stimulation can modify emotional states and cognitive performance, even in animals without human-level appreciation for melody or rhythm. 

The third important finding concerns the body’s physical responses to sound. Studies reported that music exposure could enhance immune responses, alter blood pressure, and shift autonomic nervous system activity toward greater parasympathetic (rest and digest) functioning. Some research even showed reduced pain markers and slower tumor growth in certain models when music was part of the experimental setup. These effects point toward a link between music and basic physiological regulation. 

This systematic review of music interventions in rodents reveals consistent evidence that sound influences physical systems far beyond simple hearing. Music was associated with changes in brain chemistry, behavior, immune function, and physiological markers. While the studies involve animals and have limitations like varied methods and unclear bias risk, they lay important groundwork for understanding how acoustic environments might shape biological processes. Future research in both animals and humans could help clarify the mechanisms and explore how sound might one day be harnessed for health and healing.

Source: Kühlmann, A Y Rosalie et al. “Music Affects Rodents: A Systematic Review of Experimental Research.” Frontiers in behavioral neuroscience vol. 12 301. 14 Dec. 2018, doi:10.3389/fnbeh.2018.00301

Written by Meredith Wesolek