Does music affect the brain?

Music has powerful effects on the human brain. Indeed, playing or even simply listening to music triggers activity across multiple brain regions, stimulating neural pathways that drive emotional and physical responses.

At its most fundamental level, music consists of vibrations that move through air in the form of sound waves. When these vibrations reach the outer ear, they are funneled to the middle ear, becoming amplified along the way. As they reach the inner ear, they cause fluid in the cochlea to move, bending tiny hair cells. This results in the conversion of the vibrations into electrical signals that are then detected by the auditory nerve. The auditory nerve relays the signals to the brainstem, from where they are received by the medial geniculate nucleus of the thalamus, which filters, enhances, and reroutes the information to the auditory cortex in the temporal lobe.

Up to this point, in a phenomenon known as tonotopy, the spatial properties of the sound waves received by the hair cells have been preserved. In other words, sounds of different frequencies have traveled along distinct neural paths, resulting in an ordered neural representation of frequency referred to as a tonotopic map. This frequency-based map is used for higher-order cognitive and associative processing, in which spatial frequency organization is transformed and the information is sent to neural circuits in the temporal, parietal, and frontal lobes. The convergence of these signals in higher-order cognitive networks dictates behavioral actions, sensory experiences, and memory formation.

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In the context of music, the entire neural tract—from the raw tonotopic frequencies to the transmission of signals along dual ventral and dorsal neural streams from the auditory cortex to the final executive destinations—transforms simple sound waves into a multidimensional emotional and cognitive experience. The complexity of music is central to this experience, as neurons in virtually all major regions of the brain are recruited for information processing. For example, pathways in the motor cortex and cerebellum process aspects such as beat, rhythm, and timing. The brain’s language centers decode the meaning of lyrics and allow for singing along. Meanwhile the prefrontal cortex tracks music structure, with the storage of previously heard notes in short-term memory enabling the prediction of notes or chords that come next.

Finally, listening to music, especially one’s favorite song or kind of music, has the ability to stimulate the release of dopamine in the brain. Dopamine facilitates feelings of pleasure and motivation, helping to explain why many people enjoy music. Listening to or playing music can further lower levels of the stress hormone cortisol. These activities can calm the nervous system and potentially even accelerate recovery from stress.