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Functional Directional Brain-Heart Interplay Correlates of Dreaming: a Pilot Study

Functional brain-heart interplay (BHI) plays an important role in sleep, however its mediating role during a dreaming experience is yet unknown. To this end, in this pilot study we characterize functional directional BHI in two healthy subjects using heart rate variability and electroencephalographic series gathered from REM sleep that leads to a dream recall. Preliminary results show significant differences between non-dream and dream recalls and suggest that dream increases from-brain-to-heart fronto-parietal activity and reduces from-heart-to-brain fronto-occipital activity.