Outcome measures
Standing COP was measured using a COP platform (SR Vision by Sumitomo Riko Co. Ltd, Nagoya, Japan) to assess standing postural orientation. The frequency of signals was recorded at a sampling rate of 20 Hz to generate the COP data, which is valid and reliable for quantifying standing balance [To assess spatial perception, SSA was measured using a 32” (1375 × 767 pixels) touch panel (NEWCOM Inc., Saitama, Japan) [