Prisms to Shift Pain Away: Pathophysiological and Therapeutic Exploration of CRPS with Prism Adaptation
Table 8
Statistical analysis of patients performance before and after prism adaptation in the circle drawing task.
Effects
Pre/post
Hand
Direction
Pre/post × hand
Hand × direction
Pre/post × direction
Pre/post × hand × direction
ANOVA
Statistics
No vision
Perimeter
2.84
0.152
0.00
0.978
39.54
0.001
1.26
0.311
1.42
0.286
15.48
0.011
0.51
0.508
Angle
0.38
0.564
4.50
0.087
210.9
0.000
4.18
0.096
0.00
0.971
2.23
0.195
1.65
0.255
Horiz. drift
0.69
0.443
6.66
0.049
2.28
0.191
0.02
0.896
2.23
0.195
1.43
0.285
0.01
0.913
Horiz. extent
1.33
0.300
0.94
0.377
16.04
0.010
0.01
0.935
0.134
0.729
3.53
0.119
0.01
0.935
Surface
2.05
0.211
0.24
0.646
31.21
0.002
0.29
0.612
0.01
0.924
3.16
0.136
0.47
0.525
Hand vision
Perimeter
2.78
0.156
0.71
0.438
16.86
0.003
0.00
0.960
0.17
0.698
0.41
0.551
5.15
0.072
Angle
1.62
0.259
1.31
0.304
1.33
0.301
0.28
0.620
2.36
0.185
0.74
0.43
0.00
0.960
Horiz. drift
0.66
0.453
3.20
0.133
3.81
0.108
0.89
0.388
2.93
0.147
0.95
0.375
0.55
0.489
Horiz. extent
3.07
0.140
0.71
0.438
66.62
0.001
0.00
1.000
0.04
0.843
0.299
0.608
0.06
0.805
Surface
2.43
0.18
0.80
0.412
33.11
0.002
0.15
0.716
0.01
0.921
0.94
0.376
1.53
0.270
Full vision
Perimeter
5.05
0.075
12.65
0.016
0.09
0.770
0.20
0.674
0.63
0.463
0.95
0.375
0.44
0.534
Angle
0.14
0.725
1.67
0.255
0.58
0.479
0.80
0.411
3.74
0.11
0.130
0.733
1.30
0.305
Horiz. drift
0.73
0.430
1.03
0.357
1.11
0.340
0.14
0.720
2.08
0.209
0.01
0.916
0.89
0.389
Horiz. extent
0.54
0.495
7.89
0.037
1.15
0.333
4.50
0.087
0.33
0.591
0.17
0.693
2.03
0.214
Surface
4.62
0.084
12.00
0.018
5.85
0.060
0.06
0.809
0.00
0.933
0.04
0.841
0.13
0.728
Crucially no significant pre/post hand interaction was obtained, which means that the hand difference observed during the pretest in patients and controls was not affected by the prism adaptation therapy. Only hand and direction effects reached significance, confirming the main effects found during the pretest in both subjects groups. The hand effects tended to be prominent in the full-vision condition whereas the direction effects tended to be prominent in the no-vision condition.
