Table 3 Spectral analysis of postural sways in the reference and manipulated conditions.
| Group | Condition | Vision | LF band | MF band | HF band |
|---|---|---|---|---|---|
| RL | REF | EO | 2213.6 (1523.9)* | 755.8 (513.1)* | 8.7 (7.6) |
| EC | 2096.5 (1370.8)* | 716.2 (453.1)* | 3.8 (3.7) | ||
| MAN | EO | 5068.1 (4908.0)* | 1721.0 (1618.3)* | 4.5 (5.2) | |
| EC | 3657.7 (1230.8)* | 1282.0 (461.4)* | 21.9 (19.7) | ||
| HL | REF | EO | 12234.8 (9990.5) | 4089.8 (3328.3) | 4.8 (3.9) |
| EC | 18743.8 (8353.3) | 6274.2 (2795.4 ) | 12.9 (28.1) | ||
| MAN | EO | 9266.6 (10579.2) | 3102.1 (3522.0) | 2.2 (2.0) | |
| EC | 16326.9 (10883.5) | 5457.6 (3618.1) | 12.5 (17.8) |
EC, eyes closed; EO, eyes open; HF, high frequency; HL, high‐level; LF, low frequency; MAN, manipulated condition; MF, medium frequency; REF, reference condition; RL, regional level.
*Significant group effect (RL or HL; p<0.05). No significant condition effects (REF or MAN) or vision effects (EO or EC) and no significant interactions were observed.
Distribution of normalised values of the total spectral energy (V2/Hz) in three frequency bands is as follows: LF (0–0.5 Hz); MF (0.5–2 Hz); and HF (>2 Hz). Values are mean (SD)