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Mean overall changes in oxyhemoglobin concentration during the tasks by dorsolateral prefrontal cortex hemisphere.
| Task | Oxyhemoglobin (mM) by hemisphere | Wilcoxon signed rank test | ||
| Left | Right | z | P value | |
| Circle | 1.26×10–3 | 9.8×10–4 | –2.052 | .04 |
| Tooth | 1.38×10–3 | 1.08×10–3 | –2.897 | .004 |
