On Repeat: Listening to Favourite Music Improves Brain Plasticity, Cognitive Performance of Alzheimer’s Patients: Toronto Study
by Josslyn Johnstone
Researchers at the University of Toronto and Unity Health Toronto have demonstrated that repeated listening to personally meaningful music induces beneficial brain plasticity in patients with mild cognitive impairment or early Alzheimer’s disease.
Changes in the brain’s neural pathways correlated with increased memory performance on neuropsychological tests, supporting the clinical potential of personalized, music-based interventions for people with dementia.
The multi-modal study was published today in the Journal of Alzheimer’s Disease.
“We have new brain-based evidence that autobiographically salient music — that is, music that holds special meaning for a person, like the song they danced to at their wedding — stimulates neural connectivity in ways that help maintain higher levels of functioning,” says Michael Thaut, senior author of the study and director of U of T’s Music and Health Science Research Collaboratory, who is also a professor at the Faculty of Music and Temerty Faculty of Medicine.
“Typically, it’s very difficult to show positive brain changes in Alzheimer’s patients. These preliminary yet encouraging results show improvement in the integrity of the brain, opening the door to further research on therapeutic applications of music for people with dementia — musicians and non-musicians alike,” says Thaut, who also holds the Tier One Canada Research Chair in Music, Neuroscience and Health.
The research team reported structural and functional changes in neural pathways of study participants, notably in the prefrontal cortex, the brain’s control centre where deep cognitive processes occur. The researchers showed that exposing the brains of patients with early-stage cognitive decline to autobiographically salient music activated a distinct neural network — a musical network — comprised of diverse brain regions that showed differences in activation after a period of daily music listening.
They also observed differences in the brain’s connections and white matter, providing further evidence of neuroplasticity.
“Music-based interventions may be a feasible, cost-effective and readily accessible intervention for those in early-stage cognitive decline,” says Corinne Fischer, lead author and associate professor of psychiatry at Temerty Medicine, who is also director of geriatric psychiatry at St. Michael’s Hospital, Unity Health Toronto.
“Existing treatments for Alzheimer’s disease have shown limited benefit to date. While larger controlled studies are required to confirm clinical benefits, our findings show that an individualized and home-based approach to music-listening may be beneficial and have lasting effects on the brain.”
For the study, 14 participants — eight non-musicians and six musicians — listened to a curated playlist of autobiographically relevant, long-known music for one hour a day over the course of three weeks. Participants underwent structural and task-based functional MRI before and after the listening period to determine changes to brain function and structure. During these scans, they listened to clips of both long-known and newly composed music. Heard one hour before scanning, the new music was similar in style yet held no personal meaning.
When participants listened to the recently heard, newly composed music, brain activity occurred mainly in the auditory cortex, centred on the listening experience. However, when participants listened to long-known music, there was significant activation in the deep-encoded network of the prefrontal cortex, a clear indication of executive cognitive engagement.
There was also strong engagement in subcortical brain regions, older areas minimally affected by Alzheimer’s disease pathology.
The researchers reported subtle but distinct differences in structural and functional brain changes associated with music listening in musicians relative to non-musicians, though further studies in larger samples are needed to verify these findings. Repeated exposure to music with autobiographical salience improved cognition in all participants, regardless of musicianship.
“Whether you’re a lifelong musician or have never even played an instrument, music is an access key to your memory, your pre-frontal cortex,” says Thaut. “It’s simple — keep listening to the music that you’ve loved all your life. Your all-time favourite songs, those pieces that are especially meaningful to you — make that your brain gym.”
This paper builds on a previous study in the same participant group that first identified the brain mechanisms that encode and preserve musical memories in people with early-stage cognitive decline.
Next, the researchers plan to replicate the study in a larger sample and institute a strong control condition to investigate the role of musicianship in moderating brain responses, and whether it is the music or the autobiographical content that induces changes in plasticity.
Photo: Ron Lech/Pexels
TORONTO
The University of Toronto is a world-renowned university in a celebrated city where knowledge meets achievement, history meets future and ambitions meets inspiration. Leading academics and employers from around the world have rated the University of Toronto as #1 in Canada and among the best in the world. Our undergraduate students have an exceptional range, choice and depth of study; they can choose from 700 academic programs, learn from the best minds, get involved with research, and take advantage of smaller learning communities across our three campuses, which span the Greater Toronto Area. Each campus offers a wealth of opportunities across multiple disciplines. To the west, the University of Toronto Mississauga combines advanced research with an intimate academic experience. The University of Toronto’s St. George campus features diverse college communities within Toronto’s vibrant downtown core. And to the east, the University of Toronto Scarborough leads community-engaged research, hands-on learning and co-op programs both locally and internationally. Working with faculty and other students in close-knit communities, our students tailor their experiences to their interests and develop passions that help them make their mark on the world.
TORONTO MUSIC
Home to Canada's largest number of musicians and venues, Toronto is a creative and business hub for music in Canada.
While in Toronto, plan on attending a performance of the Canadian Opera Company or the Toronto Symphony Orchestra.
Check out Toronto Life and Toronto (the official website of Tourism Toronto) for current shows, concerts and events.
There's music around every corner.
OUR U of T
We are very proud to be part of U of T—a vibrant university community located in an amazing city with global reach.
U of T is a leader in research and teaching, an intellectual environment unmatched in depth and breadth.
We live here.
U of T MUSIC
The Faculty of Music at the University of Toronto brings together creative and motivated students with outstanding educators. With extensive curricula in fields such as classical and jazz performance, music education, composition, music history, music theory, and ethnomusicology, the Faculty of Music also offers courses that explore music’s intersections with health sciences, technology, and humanities.
Our commitment to artistic and academic achievement, the vast possibilities of the University of Toronto campus, and the vibrant and diverse cultural life of Toronto provide an exciting and inspiring learning environment.
HEAR
Our season is well underway and there is so much to choose from.
Visit our online calendar often for concerts and events and subscribe to our YouTube channel for exciting premieres, livestreams and performances from our archives.