Repetitive transcranial magnetic stimulation combined with Tai Chi improves working memory in older adults with sleep disorders and mild cognitive impairment: An fMRI-based randomized controlled trial Publication date: Available online 19 June 2026 Source: International Psychogeriatrics Author(s): Linxin Bai, Zhenxing Guo, Kaifeng Xu, Yuxuan Sun, Lin Zhang, Jiahui Gao, Lidian Chen, Zhizhen Liu