# fNIRS data Functional near-infrared spectroscopy (fNIRS) data is captured during each protocol with a NIRx NIRSport2 system. In this dataset, data is recorded at 10.1 Hz with a montage consisting of 8 sources and 8 detectors, covering the prefrontal cortex (PFC). An additional 8 short-channel detectors are used, one for each source. This results in a total of 33 channels in the data, or 20 regular channels along with 13 channels created by the short-channel detectors. The fNIRS data is stored in a [BIDS](https://bids-specification.readthedocs.io/en/stable/04-modality-specific-files/11-near-infrared-spectroscopy.html) dataset. To create this dataset, data originally in .nirs format were converted into the [SNIRF](https://github.com/fNIRS/snirf) format. SNIRF files were generated using a NIRS Brain AnalyzIR fork with MATLAB R2021a: https://github.com/alkvi/nirs-toolbox-fork/commit/dfc4e28d2c8ed5abf4685a6b7a8e596a7d07a1e4 SNIRF files were validated using [pysnirf2](https://github.com/BUNPC/pysnirf2) (v0.7.3). The SNIRF files were then converted into a BIDS dataset using [sourcedata2bids](https://github.com/rob-luke/fnirs-apps-sourcedata2bids) (v0.4.5). The BIDS dataset can be found in: ~~~ fNIRS_data/bids_dataset_snirf ~~~ # Montage A detailed list of the location of each source and detector in a standard template (Colin27) can be found in the following table, created with [AtlasViewer](https://github.com/BUNPC/AtlasViewer). ~~~ src det ch_coord_mc ch_coord_mni label_name 1 1 98 177 136 -29 28 16 Insula_L 1 2 101 194 168 -27 44 47 Frontal_Sup_L 1 14 101 182 149 -26 33 28 Frontal_Mid_L 1 15 109 194 139 -18 45 20 Frontal_Mid_L 2 1 86 199 125 -42 51 7 Frontal_Inf_Tri_L 2 3 107 199 120 -20 51 2 Frontal_Sup_L 2 9 86 208 114 -42 60 -3 Frontal_Mid_Orb_L 3 1 94 198 133 -33 49 15 Frontal_Mid_L 3 3 114 200 122 -13 51 4 Cingulum_Ant_L 3 4 121 200 138 -6 50 19 Cingulum_Ant_L 3 14 103 199 144 -24 50 25 Frontal_Sup_L 3 15 115 199 134 -12 50 15 Cingulum_Ant_L 4 2 118 195 180 -9 44 58 Frontal_Sup_Medial_L 4 4 130 195 154 3 44 34 Frontal_Sup_Medial_R 4 5 142 198 175 15 46 54 Frontal_Sup_R 4 10 130 193 178 3 41 56 Frontal_Sup_Medial_L 5 3 117 210 118 -10 61 1 Frontal_Med_Orb_L 5 4 129 205 132 2 55 14 Cingulum_Ant_L 5 6 142 219 116 15 70 0 Frontal_Med_Orb_R 5 8 130 218 117 3 69 0 Frontal_Sup_Medial_L 6 4 143 219 146 16 69 28 Frontal_Sup_R 6 6 152 204 127 26 54 9 Frontal_Mid_R 6 7 158 196 132 32 46 13 Frontal_Sup_R 6 12 150 198 144 24 47 24 Frontal_Sup_R 6 13 150 207 138 23 57 19 Frontal_Mid_R 7 5 153 191 163 27 40 42 Frontal_Mid_R 7 7 164 177 138 38 26 17 Frontal_Inf_Tri_R 7 12 158 183 150 32 32 30 Frontal_Mid_R 7 13 148 197 143 22 46 23 Frontal_Sup_R 8 6 160 210 118 34 60 1 Frontal_Mid_Orb_R 8 7 167 194 121 41 44 2 Frontal_Inf_Tri_R 8 11 164 196 119 39 46 1 Frontal_Mid_R 8 13 165 216 128 39 65 11 Frontal_Sup_R ~~~ A NIRx format ProbeInfo file can be found at: ~~~ fNIRS_data/nirx_probe/fnirs_study_probeInfo.mat ~~~