TABLE 1.
Condition1, 2 | Acronym3 | Visual Freq. [Hz] (V) |
Somatosensory Freq. [Hz] (T) |
Vestibular [Hz] (P) |
Freq. |
---|---|---|---|---|---|
All systems low | LLL | 0.32 | 0.24 | 0.40 | |
Medium V, low T, low P | MLL | 0.57 | 0.24 | 0.40 | |
High V, low T, low P | HLL | 1.01 | 0.24 | 0.40 | |
Low V, medium T, low P | LML | 0.32 | 0.59 | 0.40 | |
Low V, high T, low P | LHL | 0.32 | 1.11 | 0.40 | |
Low V, low T, medium P | LLM | 0.32 | 0.24 | 0.52 | |
Low V, low T, high P | LLH | 0.32 | 0.24 | 0.86 |
Amplitude range was kept constant as follows: visual dots (visual stimulus) = 9 mm medial-lateral; touch-pole (somatosensory stimulus) = 4 mm medial-lateral; platform tilt (vestibular stimulus) = 0.25º tilt;
V = Visual; T = Somatosensory; P = Vestibular;
L = low frequency movement; M = medium frequency movement; H = high frequency movement