Fronto-temporoparietal connectivity and self-awareness in 18-month-olds: A resting state fNIRS study

Figures

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  Fig. 1. Representation of the fNIRS arrays. Sources are marked with stars, detectors are marked with circles, channels are marked with black dotted lines and numbered with blue circles. The red dotted lines highlight the additional rows of optodes that added 7 channels per hemisphere (results from the 44-channel configuration are presented in the Supplementary materials).

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  Fig. 2. Pictures of the toddlers wearing the fNIRS cap. The first row represents the cap with the 30-channel configuration, and the second row the cap with the 44-channel configuration.

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  Fig. 3. Still frames from the screensaver-like video shown during the resting-state acquisition.

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  Fig. 4. A, Representation of the channels on a 2-year-old structural template. B, Schematic representation of the channels. ROIs are highlighted: red represents mPFC, green represents STG, purple represents middle/posterior temporal gyrus, blue represents TPJ.

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  Fig. 5. A, Representation of the fNIRS resting-state data acquired. In the lower part of the figure, a red box marks channels excluded from the analysis because of a mean intensity lower than 10−3 optical units. On the remaining channels, red windows mark chunks excluded based on the behavioural coding. The grey windows represent the 8 s of additional data excluded after each invalid section. B, Correlation matrix of 30 × 30 channels. Blue lines indicate channels that were excluded because of the pre-processing (the diagonal blue line indicates the correlation of the channels with themselves).

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  Fig. 6. Graphical representation of the one sample t-tests in the whole sample within the fronto-temporoparietal regions and within the rest of the channels. HbO2 is plotted in red, HHb is plotted in blue. A, fronto-temporoparietal connections, HbO2 signal; B, fronto-temporoparietal connections, HHb signal; C, Rest of the channels, HbO2 signal; D, Rest of the channels, HHb signal. Connections that are significantly different from zero both in the HbO2 and the HHb signal are plotted in black.

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  Fig. 7. Graphical representation of the differences in fronto-temporoparietal connectivity between Recognisers and Non-Recognisers. A, fronto-temporoparietal connections, HbO2 signal; B, fronto-temporoparietal connections, HHb signal; C, Rest of the channels, HbO2 signal; D, Rest of the channels, HHb signal.