Posture Used in fMRI-PET Elicits Reduced Cortical Activity and Altered Hemispheric Asymmetry with Respect to Sitting Position: An EEG Resting State Study.

摘要: Horizontal body position is a posture typically adopted for sleeping or during brain imaging recording in both neuroscience experiments and diagnostic situations. Recent literature showed how this similar ones with head down are associated to reduced plasticity, impaired pain emotional responses. The present study aimed at further understanding the decrease of cortical activity horizontal by measuring high-frequency EEG bands - high-level cognitive activation resting state experimental condition. To end, two groups 16 female students were randomly assigned either sitting control (SC) 2-h Bed Rest condition (hBR) while was recorded from 38 scalp sites. hBR group underwent several transitions, supine, supine sitting. Results revealed clear effect posture: showed, compared its baseline SC, High-Beta Gamma band amplitudes throughout In addition, before after condition, as well SC exhibited greater left vs. right frontal while, on contrary, induced bilateral participants. sources significantly more active participants included Inferior Frontal Gyrus Insula. discussed relation differences among neuroimaging methods (e.g., fMRI, EEG, NIRS), which can be partially explained posture-induced neural network changes.