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Conversion disorder and fMRI

2006· review· en· W2099159531 on OpenAlexaff
Trevor A. Hurwitz, James W. Prichard

Bibliographic record

VenueNeurology · 2006
Typereview
Languageen
FieldMedicine
TopicPsychosomatic Disorders and Their Treatments
Canadian institutionsUniversity of British Columbia Hospital
Fundersnot available
KeywordsConversion disorderPsychogenic diseaseSensory systemNeuroscienceCognitionSensationNeurologyPsychologyMedicinePhysical medicine and rehabilitationPsychiatry

Abstract

fetched live from OpenAlex

Conversion reactions can involve many neurologic functions ranging from movement and somatic sensation to the special senses and cognitive intellectual abilities. The diagnosis is made at the bedside and is usually straightforward. However, up to 15% of diagnosed conversion reactions subsequently prove to be due to missed neurologic conditions.1 The sooner new methods define the neurobiological mechanisms that underlie conversion reactions as well as subtle presentations of organic disease capable of mimicking them, the better for both patient and neurologist. The report in this issue of Neurology by Ghaffar et al. on noninvasive observations made by functional MRI (fMRI) in three patients with unilateral psychogenic sensory disturbance is a useful step in that direction.2 We also believe that further effort in this area can advance general understanding of how the nervous system works. The essential feature of a conversion reaction is that the complaints and findings do not follow known neurologic damage patterns.1 There is no recognized location within the motor, sensory, special sensory, or cognitive intellectual pathways where organic injury or malfunction will produce the reported symptoms or observed signs. The information that fMRI can obtain about what the nervous system is doing while …

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 machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Review · Consensus signal: Review
Teacher disagreement score0.004
Threshold uncertainty score0.012

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0020.000
Bibliometrics0.0030.002
Science and technology studies0.0000.001
Scholarly communication0.0010.001
Open science0.0010.000
Research integrity0.0020.001
Insufficient payload (model declined to judge)0.0040.002

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 head0.023
GPT teacher head0.310
Teacher spread0.287 · 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 source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreReview

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

Citations23
Published2006
Admission routes1
Has abstractyes

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