Fig 1.
Standardization of the posturography assessment and virtual reality procedure.
The participants were standing in a relaxed position, with their arms folded over their chest, and they were instructed to keep their head straight forward while watching the VR video. The force platform recorded the participants’ postural stability and the body movements to maintain balance while watching the VR video.
Table 1.
Descriptive characteristics, n = 27.
Table 2.
Influence of Repetition and Direction during VR video sessions.
Table 3.
Influence of initial VR video and effects of adaptation.
Fig 2.
Stability during repeated VR video sessions and during the control tests of quiet stance.
The performances recorded during the five repeated VR video sessions are presented as bars (mean) and whiskers (SEM) values of normalized total (A), low frequency (C) and high frequency (E) torque variance. Within the total and high frequency energy spectral ranges, the participants gradually across the sessions significantly reduced the energy used in both anteroposterior and lateral directions. The performance during the quiet stance eyes closed and eyes open control tests are presented as normalized total (B), low frequency (D) and high frequency (F) torque variance. In the control tests, the participants used less high frequency energy with eyes open compared with eyes closed in anteroposterior direction. During almost all VR video sessions and control tests, and in all spectral ranges, less energy was used in lateral direction compared with anteroposterior direction.
Table 4.
Influence of Vision and Direction on quiet stance stability.