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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: Exp Brain Res. 2011 Apr 9;211(1):87–96. doi: 10.1007/s00221-011-2655-6

Table 1.

Period of trial described and % variability explained by each of the four functional principal components (fPC) for each dependent variable across all subjects

fPC1 fPC2 fPC3 fPC4
COM Sustained tilt and return to neutral (28%) Return to neutral (24%) Tilt + 10 s (8%) Sustained tilt (24%)
COP Sustained tilt and return to neutral (25%) Return to neutral (21%) Tilt + 10 s (6%) Sustained tilt (22%)
TA Sustained tilt and return to neutral (28%) Return to neutral (39%) Sustained tilt (20%) Tilt + 10 s (3%)
GAS Sustained tilt (24%) Return to neutral (24%) Tilt + 10 s (9%) Sustained tilt and return to neutral (30%)
Ankle angle Sustained tilt and return to neutral (30%) Return to neutral (31%) Tilt + 10 s (5%) Sustained tilt (23%)
Hip angle Return to neutral (36%) Sustained tilt (20%) Tilt (5%) Sustained tilt and return to neutral (32%)