Mechanisms of action and advances in application of music therapy in improving cognitive impairment based on the theory of neuroplasticity.

As global population aging accelerates, preventing and treating cognitive impairment has become a major public health priority. Music therapy is a safe, well-tolerated non-pharmacological intervention with substantial potential to improve cognitive function. This review synthesizes the neurologic music therapy (NMT) framework, encompassing techniques targeting attention, memory, and executive function, delivered through both active and receptive approaches. Clinical investigations indicate that music therapy may improve cognition and neuropsychiatric symptoms in Alzheimer's disease (AD), vascular cognitive impairment (VCI), Parkinson's disease-related cognitive impairment, mild cognitive impairment (MCI), and traumatic brain injury (TBI); however, effects appear to vary by intervention duration and disease stage. This narrative review aims to provide a theoretical foundation and practical guidance for the non-pharmacological intervention of cognitive impairment by collating evidence on the neuroplasticity theoretical foundations, technical systems, and clinical applications of music therapy.