Table 4. Effects of pain catastrophising on source dipole waveforms.
Source | High-Cat | Low-Cat | Effect | F(df) | P | η2 p | ||
---|---|---|---|---|---|---|---|---|
Pain | Non-pain | Pain | Non-pain | |||||
C | 7.18 (28) | .012 | 0.2 | |||||
1 | 3.8±4.0 | -0.5±3.7 | 11.7±4.0 | 16.0±3.7 | P | <0.001 | 0.98 | 0 |
C*P | 1.92 | 0.17 | 0.064 | |||||
C | 6.4 (28) | <0.001 | 0.68 | |||||
2 | 36.6±5.0 | 37.9±5.5 | 16.9±5.0 | 20.6±5.0 | P | 2.47 | 0.127 | 0.081 |
C*P | 0.58 | 0.453 | 0.02 | |||||
C | 3.95 (28) | 0.057 | 0.124 | |||||
3 | 44.0±7.3 | 50.4±7.6 | 23.4±7.3 | 30.7±7.6 | P | 5.6 | 0.024 | 0.17 |
C*P | 0.022 | 0.88 | 0.001 | |||||
C | 6.45 | <0.001 | 0.381 | |||||
4a | 3.6±4.5 | 6.0±4.7 | 21.3±4.5 | 18.9±4.7 | P | 0.00 | 1 | 0 |
C*P | 0.945 | 0.34 | 0.033 | |||||
C | 5.85 | 0.022 | 0.74 | |||||
4b | 36.0±4.6 | 24.8±3.6 | 21.0±4.6 | 13.8±3.6 | P | 15.59 | <0.001 | 0.36 |
C*P | 0.711 | 0.41 | 0.025 |
Source dipole moments (mean ± SD, nAm) in select time epochs in high and low pain catastrophisers during viewing pain or non-pain pictures. F values (with degrees of freedom), P values and effect sizes (η2 p) for ANOVA comparisons are also shown. C = main effect of catastrophising, P = main effect of picture type, C*I = interaction effect. Source 1 = rostral anterior cingulate cortex 280–336 ms; Source 2 = left paraphippocampal gyrus 596–828 ms; Source 3 = right parahippocampal gyrus 580–664 ms; Source 4a-4b = posterior cingulate cortex 384–452 ms and 756–1144 ms respectively.