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Abstract #2389

Why elder adults have a higher fall risk in dual-task daily life: A Preliminary fMRI Study

Yijia Zheng1, Ye Wang1,2, Yi Zhu1, Xiaoying Wang1,3, Jue Zhang1,4, and Jing Fang1,4

1Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China, 2Neuroscience and Intelligent Media Institute, Communication University of China, Beijing, China, 3Department of Radiology, Peking University First Hospital, Beijing, China, 4College of Engineering, Peking University, Beijing, China

Reduced plantar sensation can lead to weakened balance ability in elder adults and an addition of cognitive tasks will further weaken it. Thereby, we attempted to explore the brain activity pattern of the elder and of young adults under foot stimuli and in dual-task condition. The results revealed that elder adults have significantly stronger cortical excitability than young do, and that foot stimuli induced stronger cortical excitability compared with dual-task condition. In conclusion, these phenomena may be due to the elder adults’ inadequate central reserve. Besides, added cognitive task can further reduce the brain’s response through diminished sensory input.

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