The Hydraulic Brain: Understanding as Constraint-Release Phase Transition in Whole-Body Resonance
arXiv Preprint Archive November 22, 2025 Ahmed Gamal Eldin
This paper proposes that brain-body physiological signals, typically treated as noise, are functionally important for cognition. Using high-density EEG during a P300 target recognition task, the authors found zero-lag synchrony and strong bidirectional coupling between brain and body signals, peaking at 78.1 ms. Time-resolved entropy analysis revealed three phases: constraint accumulation, a supercritical transition with a 58% directional increase in state expansion, and sustained metastability. The transition magnitude was uncorrelated with resonance strength, suggesting binary threshold dynamics. The authors argue that brain-body resonance acts as a discrete gate triggering non-linear information integration, potentially distinguishing biological from artificial intelligence.