Fig. 5: Group independent component analysis (ICA) components identified from the oxygenated (HbO), deoxygenated (HbR), and total (HbT) hemoglobin recordings.

Functional optoacoustic (fOA) components revealed cortical and limbic networks. The fOA ICA maps unveiled unique patterns within each hemodynamic component, showcasing spatially overlapping resting-state networks between the two modalities. S1BF = primary somatosensory area, barrel field; S1LL = primary somatosensory area, lower limb; S1UL = primary somatosensory area, upper limb; S1T = primary somatosensory area, trunk; S1M = primary somatosensory area, mouth; M2 = secondary motor area; V1 = primary visual area; MO = orbital area, medial part; Cg = anterior cingulate area; RSD = retrosplenial area, dorsal part; RSV = retrosplenial area, ventral part; Sub = Subiculum; HipD = dorsal hippocampus.