Fig. 1

Flow diagram of study participants and allocation to group
Note. Participants were 21 older adults with MCI and 19 healthy older adults. Static balance ability was measured for 30s, and the participants were requested to complete a test of static balance control while standing on a solid surface and a foam surface, respectively, in the eyes open and eyes closed conditions. In addition, PFC activity was measured when the participants were in these static balance control conditions by fNIRS