Fig 1.
Participants viewed short humorous or neutral video clips (4000–16,000 ms) and were given 3000 ms following the clip to indicate with a button press whether they liked or did not like the video clip. Intertrial interval ranged from 500 to 13,000 ms.
Fig 2.
(A) fNIRS channel locations and functional localization into 18 ROIs based on proximity of channels and anatomy. White numbers represent channels and yellow numbers represent ROIs which include 1 = left frontopolar cortex; 2 = left middle frontal gyrus; 3 = left inferior frontal gyrus BA 47 and 45; 4 = left dorsolateral prefrontal cortex; 5 = left inferior frontal gyrus BA 44 and 45; 6 = left inferior parietal lobe; 7 = left superior parietal lobe; 8 = left temporoparietal junction; 9 = left temporo-occipito-parietal junction; 10 = right frontopolar cortex; 11 = right middle frontal gyrus; 12 = right dorsolateral prefrontal cortex; 13 = right inferior frontal gyrus BA 47 and 45; 14 = right inferior frontal gyrus BA 44 and 45; 15 = right inferior parietal lobe; 16 = right superior parietal lobe; 17 = right temporoparietal junction; 18 = right temporo-occipito-parietal junction. (B) fNIRS funny>neutral contrast significant results (p<0.05 FDR corrected). ROIs that exhibited both HbO and HbR significant changes for funny>neutral (p<0.05 FDR corrected) included left DLPFC (ROI 4), left IPL (ROI 6), left TOPJ (ROI 9), right IFG (ROI 13) and right SPL (ROI 16).
Table 1.
Beta contrast of activation for funny>neutral for regions surviving FDR correction of p<0.05 for both HbO and HbR.
Fig 3.
Correlation analysis with HbO and behavioral indexes.
(A) HbO in left TOPJ negatively correlated with extraversion (B) HbO in left TOPJ positively correlated with age.
Fig 4.
(A) Coherence analysis between and within regions (B) Coherence analysis between and within regions separated for girls and boys (C) Paired t-test analysis between funny and neutral conditions. * significant result at p<0.05 FDR corrected.