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Homonymous hemianopia as the presenting sign of posterior cortical atrophy

2021· article· en· W3215113712 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenuePractical Neurology · 2021
Typearticle
Languageen
FieldMedicine
TopicOphthalmology and Eye Disorders
Canadian institutionsUniversity of Toronto
Fundersnot available
KeywordsPosterior cortical atrophyAtrophySign (mathematics)MedicineHemianopsiaPsychologyNeuroscienceAudiologyPhysical medicine and rehabilitationVisual fieldPathologyDementiaDisease

Abstract

fetched live from OpenAlex

A 56-year-old man reported 1 year of progressive decline in the vision of both eyes, left more than right. He had difficulty explaining his symptoms. Although he could clearly see the letters of text when reading, he struggled to verbalise and understand the content. He took amitriptyline and sertraline for anxiety and depression. Visual acuity was 6/12 (20/40) in each eye with normal ocular examination. He read simple material in a slow, halting fashion and made several errors. He scored 20/30 on mini-mental state examination. Formal visual field testing identified an incongruous left homonymous defect with good reliability (figure 1A). Figure 1 Homonymous field defect in posterior cortical atrophy. (A) 24-2 Humphrey visual fields showing left homonymous field defect. MR scan of the brain showing no structural lesion, only mild posterior atrophy with prominent sulci within …

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.

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)0.004
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.301
Threshold uncertainty score0.987

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.004
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 science0.0000.000
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0010.000

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 head0.025
GPT teacher head0.338
Teacher spread0.313 · 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