{"id": "card_n_fe27e59e1804", "kind": "note", "title": "The autonomic spine — four theories, one causal stack, one load-bearing primary", "body": "The mechanism under the layers is autonomic regulation, and it is built from FOUR published,\nindividually-falsifiable theories — Matt did not invent them, he composed them into a stack that\noperates at different levels of one system:\n\n• PREDICTIVE PROCESSING / Active Inference (Friston) — the computational frame: the brain minimizes\n  prediction error; autonomic shifts are action policies to resolve it.\n• LC-NE ADAPTIVE GAIN (Aston-Jones & Cohen) — the gain control: tonic arousal is idle RPM, phasic\n  bursts are throttle/precision; high-tonic/low-phasic = revved but imprecise (sensory overload).\n• NEUROVISCERAL INTEGRATION / Central Autonomic Network (Thayer & Lane) — the state switch: the\n  prefrontal-vagal brake, indexed by HRV; low HRV = poor inhibitory control, rigid states.\n• PREDICTIVE ALLOSTATIC INTEROCEPTION (Barrett) — the feedback loop: the brain preempts bodily needs;\n  chronic interoceptive prediction error = allostatic overload → protective sympathetic posture.\n\nThe stack is not four rival guesses; it is a computational frame (PP) driving two control systems\n(LC-NE gain, NIM state-switch) feeding an effector (ANS) closed by an interoceptive dashboard. The\nred-team's fix names NIM/CAN — the vagal brake — as the LOAD-BEARING PRIMARY: it is the most\nmeasurable and most central, and the framework's survival is pinned to it. If HRV/vagal-brake fails\nto track dysregulation within-person, the framework fails. No escape onto the other three.\n\nSAFETY BOUNDARY — this is a research framework, NOT medical advice, NOT a diagnosis, NOT a treatment plan. It is adjunctive to, never a replacement for, a licensed physician. STOP and seek urgent care for red flags: chest pain, sudden neurological deficit, fainting, severe or rapidly worsening symptoms. The engine seals the LOGIC of this framework; it does NOT and CANNOT seal that any mechanism here is medically true — that awaits the trials named below.", "source": {"label": "Concordance assay — 2026-07-10", "url": "https://narrowhighway.com/s/563d27405cf6a98c99fc3447c0a1f4ffa9ba7543d10ed41608a493d829ba02f0", "ref": "autonomic_spine", "authority_tier": "engine_derived"}, "shelf": "science", "box": "medicine", "bands": ["medicine", "autonomic nervous system", "HRV", "vagal brake", "predictive processing", "active inference", "LC-NE", "locus coeruleus", "neurovisceral integration", "interoception", "allostasis", "friston", "primary theory", "hypothesis"], "connections": [], "author": "engine", "created_at": "2026-07-10T19:06:38.084600+00:00", "updated_at": "2026-07-10T19:06:38.084600+00:00", "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "metrics": {"paperclips_count": 0, "helpful_count": 0, "not_helpful_count": 0, "cite_count": 0, "walks_through_count": 0, "flagged_count": 0}, "source_hash": "4eaca627499e8747b101b05da1607ae65ed82fdd475e650d4a3ce6357fcd2add"}