|
Mean (standard deviation) parameter values during single and dual task conditions. |
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| Parameter |
SOT |
AP |
ML |
||
|
|
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| Single |
Dual |
Single |
Dual |
||
|
|
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| ApEn |
1 |
.810 (.15) |
.819 (.17) |
1.006 (.21) |
.902 (.30) |
| 2 |
.753 (.15) |
.791 (.16) |
.902 (.26) |
.947 (.22) |
|
| 3 |
.673 (.15) |
.770 (.19) |
1.020 (.23) |
.990 (.32) |
|
| 4 |
.567 (.27) |
.613 (.22) |
.926 (.19) |
.861 (.24) |
|
| 5 |
.604 (.16) |
.649 (.19) |
.810 (.21) |
.874 (.15) |
|
| 6 |
.474 (.16) |
.548 (.22) |
.849 (.16) |
.837 (.19) |
|
| RMS |
1 |
.222 (.06) |
.223 (.07) |
.104 (.04) |
.127 (.09) |
| 2 |
.384 (.13) |
.370 (.11) |
.152 (.11) |
.132 (.07) |
|
| 3 |
.400 (.12) |
.395 (.13) |
.105 (.04) |
.120 (.07) |
|
| 4 |
1.040 (.92) |
.994 (.85) |
.151 (.09) |
.172 (.10) |
|
| 5 |
1.749 (.69) |
1.713 (.89) |
.287 (.14) |
.235 (.09) |
|
| 6 |
2.164 (.87) |
2.073 (1.2) |
.212 (.09) |
.227 (.11) |
|
| ES |
1 |
95.6 (1.3) |
95.7 (1.5) |
n/a |
n/a |
| 2 |
92.9 (2.3) |
92.8 (2.5) |
n/a |
n/a |
|
| 3 |
92.1 (2.8) |
93.7 (2.2) |
n/a |
n/a |
|
| 4 |
83.7 (12.2) |
83.3 (12.4) |
n/a |
n/a |
|
| 5 |
68.8 (11.6) |
70.3 (14.0) |
n/a |
n/a |
|
| 6 |
65.3 (12.0) |
65.9 (16.1) |
n/a |
n/a |
|
|
Approximate Entropy (ApEn) Values, Root Mean Square (RMS) displacement values, and Equilibrium Scores (ES) were based on center of pressure (COP) time series produced during six Sensory Organization Test (SOT) sensory conditions. Higher ApEn values indicate greater COP randomness (less system constraint). Higher RMS values and lower ES indicate greater COP amplitude (greater postural instability). n/a: not applicable; ES are calculated only from the COP AP component. SOT conditions are defined in Figure 1. | |||||
Cavanaugh et al. Journal of NeuroEngineering and Rehabilitation 2007 4:42 doi:10.1186/1743-0003-4-42 |
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