Component
Simultaneous sympathetic and parasympathetic activation on cold submersion
Simultaneous sympathetic and parasympathetic activation on cold submersion. Species, exposure and limitations are retained in each linked claim.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What it acts on
Cold water submersion induces a high incidence of cardiac arrhythmias in healthy volunteers, and the authors propose that simultaneous activation of the sympathetically driven cold shock tachycardia and the parasympathetically mediated diving bradycardia accounts for them, and in vulnerable individuals may be responsible for deaths previously ascribed to drowning or hypothermia.
Experimental context and source evidence
- availability_state
- biomarker_context Imported condition classification; unverified.
- evidence_span
- {"source_cache": "artifacts/cold-research/22547634.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "c712f8554b0d375f87dfe68d4a5c33eb7b485e17953dd8e7bd4b2a1c1e700ee6", "start_char": 0, "end_char": 947, "text_sha256": "c712f8554b0d375f87dfe68d4a5c33eb7b485e17953dd8e7bd4b2a1c1e700ee6"}
- experimental_model
- Review proposing simultaneous activation of two antagonistic autonomic responses
- exposure
- Cold submersion with breath holding and its release
- limitations
- A hypothesis paper. The arrhythmia observations are from healthy volunteers; the attribution of deaths to autonomic conflict is explicitly proposed rather than demonstrated.
- nutrient_topic
- Cold water immersion research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake. · Cold water immersion
- organism
- Human
- plain_language
- Two opposite nerve signals fire at once and the heart rhythm breaks down.
- primary_references
- [cold-p22547634] 'Autonomic conflict': a different way to die during cold water immersion? (2012). https://pubmed.ncbi.nlm.nih.gov/22547634/ DOI: 10.1113/jphysiol.2012.229864
- tissue_or_cell_type
- Heart
- trigger_kind
- biomarker_context Imported condition classification; unverified.
Cold water immersion: cold sensing, heat production, the catecholamine axis and what repeated exposure changes (2026-09-19) · lines 143–154
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Review proposing simultaneous activation of two antagonistic autonomic responses · source_derived_draft · unverified_draft
### cold-autonomic-conflict-arrhythmia Cold water submersion induces a high incidence of cardiac arrhythmias in healthy volunteers, and the authors propose that simultaneous activation of the sympathetically driven cold shock tachycardia and the parasympathetically mediated diving bradycardia accounts for them, and in vulnerable individuals may be responsible for deaths previously ascribed to drowning or hypothermia. Condition category: biomarker_context nutrient_topic: Cold water immersion research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake. plain_language: Two opposite nerve signals fire at once and the heart rhythm breaks down. organism: Human tissue_or_cell_type: Heart experimental_model: Review proposing simultaneous activation of two antagonistic autonomic responses limitations: A hypothesis paper. The arrhythmia observations are from healthy volunteers; the attribution of deaths to autonomic conflict is explicitly proposed rather than demonstrated. exposure: Cold submersion with breath holding and its release evidence_span: {"source_cache": "artifacts/cold-research/22547634.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "c712f8554b0d375f87dfe68d4a5c33eb7b485e17953dd8e7bd4b2a1c1e700ee6", "start_char": 0, "end_char": 947, "text_sha256": "c712f8554b0d375f87dfe68d4a5c33eb7b485e17953dd8e7bd4b2a1c1e700ee6"} [cold-p22547634] 'Autonomic conflict': a different way to die during cold water immersion? (2012). https://pubmed.ncbi.nlm.nih.gov/22547634/ DOI: 10.1113/jphysiol.2012.229864
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.