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Record W2942513899

Mysterious burst of activity in flatliners

2013· article· en· W2942513899 on OpenAlexaboutno aff
Andy Coghlan

Bibliographic record

VenueThe New Scientist · 2013
Typearticle
Languageen
FieldNeuroscience
TopicEEG and Brain-Computer Interfaces
Canadian institutionsnot available
Fundersnot available
KeywordsComa (optics)Cortex (anatomy)NeuroscienceElectroencephalographyHippocampusBurstingPsychologyPsychoanalysisPhysicsAstrophysics
DOInot available

Abstract

fetched live from OpenAlex

Pats of the brain may still be alive even when someone is in a deep coma and their brain activity seems to have gone silent. When a person enters a deep coma an electroencephalogram (EEG) may eventually show a flatline, which is one of the signs of brain death. However, while monitoring a patient who had been placed in a coma to prevent seizures following a cardiac arrest, Bogdan Florea at the Regina Maria Medical Centre in Cluj-Napoca, Romania, noticed something strange--tiny intermittent bursts of activity interrupting a flatline signal, each burst lasting a few seconds. He asked Florin Amzica of the University of Montreal in Canada and his colleagues to investigate what might be happening. In an attempt to create a similar scenario, Amzica's team put cats into a deep coma using a high dose of anesthetic. While EEG recordings taken at the surface of the brain--the cortex-- showed a flatline, those from deep-brain electrodes revealed tiny bursts of activity. Those mysterious signals originated in the hippocampus, which is responsible for memory and learning, and spread within minutes to the cortex.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.024
Threshold uncertainty score0.221

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.024
GPT teacher head0.275
Teacher spread0.251 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2013
Admission routes1
Has abstractyes

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