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Washington [US], April 27 : The world's population is ageing at an unprecedented rate. Ageing can cause numerous forms of cognitive impairment, presenting a significant burden on families and society. As a result, it is critical to develop effective strategies to promote healthy ageing.One promising approach is musical training, which is accessible to the majority of the population. Besides the musically rewarding and aesthetic experience of musical training, it also provides potential benefits to the brain, especially for the elderly.In a study published as a cover story in Science Advances, a research team led by Dr. DU Yi from the Institute of Psychology of the Chinese Academy of Sciences found that long-term musical training could mitigate and even counteract age-related decline of audiovisual speech-in-noise perception in older listeners, through functional preservation of youth-like activity patterns in sensorimotor areas, supplemented by functional compensation in frontoparietal and default mode network (DMN) regions.Older musicians, older non-musicians, and young non-musicians participated in this neuroimaging study.The researchers found that older musicians outperformed older non-musicians and even equaled young non-musicians in identifying audiovisual syllables under noisy conditions. By analyzing their brain activity, the researchers revealed two mechsms that old musicians adopt to counteract ageing: functional preservation and functional compensation.Specifically, older musicians retained neural specificity of speech representations in sensorimotor areas at a level similar to young non-musicians, while older non-musicians showed degraded neural representations. In the same region, older musicians showed higher neural alignment (i.e., higher pattern similarity) in comparison to young non-musicians than older non-musicians did, and this capacity was associated with the older musicians' training intensity. Importantly, youth-like brain function predicted better audiovisual speech-in-noise perception performance in older adults.In addition, the researchers found that older musicians, in comparison with older non-musicians, also showed greater activation in frontoparietal regions that support multiple tasks across domains and greater inhibition in task-irrelevant DMN regions that help avoid interference.The greater DMN deactivation predicted better audiovisual speech-in-noise performance. Furthermore, these two mechsms are interdependent, as greater frontoparietal activation and greater DMN inhibition contributed to more similar neural patterns in sensorimotor regions in older adults. In other words, functional compensation further supported functional preservation."Playing music makes older adults better listeners by preserving youthful neural patterns as well as recruiting additional compensatory brain regions. Our study provides empirical evidence to support that playing music keeps your brain sharp, young, and focused," said Dr. DU, corresponding author of this study.This study provides insights into adaptive brain reorgzation in ageing populations and how lifelong musical training leads to "successful ageing" in speech processing by preserving youthful brain characteristics and enhancing compensatory brain scaffolding. The functional preservation of sensorimotor regions along with compensatory DMN deactivation also suggest avenues for more targeted training regimens to protect speech functions in the elderly.Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Institute of psychology of the chinese academy of sciences, Latest News

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