Table 1.
Different complaints for all nonspecific chronic LBP subjects.
Table 2.
Detection and measurement of the vertical phoria.
Figure 1.
Illustrations of posturography testing conditions.
The subject viewed a cross target embedded by two vertical line segments that aimed to reinforce accurate fixation of the letter ‘‘x’’, at 40 cm and 200 cm.
Figure 2.
Effects of vertical phoria conditions and distance conditions in LBP subjects on postural parameters.
Means of the surface of CoP excursions (mm2), the standard deviation of lateral (SDx) and antero-posterior (SDy) postural sways (mm), and the variance of speed of CoP (mm2/s2) in vertical heterophoria (VH) condition and after prism correction (PC) for each distance (40 cm and 200 cm). Error bars represent the standard error. Asterisks indicate significant differences.
Figure 3.
Group mean values of each postural parameter.
Means of the variance of speed of CoP (mm2/s2) (A) and the antero-posterior (SDy) postural sways (mm) (B) in nonspecific chronic low back pain subjects (LBP), and in healthy subjects with vertical heterophoria (HSVH) and without VH, i.e. with vertical orthophoria (HSVO) – data for the distance are grouped. Means of the surface of CoP excursions (mm2), the standard deviation of lateral (SDx) and antero-posterior (SDy) postural sways (mm) (C) in LBP, HSVH and HSVO for each distance (40 cm and 200 cm). Error bars represent the standard error. Asterisks indicate significant differences.