The Neural Correlates of Delusions in Dementia: A Scoping Review
Bibliographic record
Abstract
Delusions are common symptoms of dementia and are clinically significant. The objective of this scoping review is to identify possible neural correlates. MEDLINE (OVID), EMBASE (OVID) and Web of Science were searched in December 2020 for the keywords 'delusions' and 'dementia'. Two informal searches were carried out subsequently. Results were limited to those in English. Intervention and study characteristics were extracted using standardised tools. Eighteen published studies, using four distinct experimental methods, were included, and 31 brain regions were identified as correlates of delusions. No region was identified consistently within included studies or found in more than four studies. Despite the range of brain regions identified, a number form part of the default mode network, the salience network or the central executive network. We explore the implications of these findings for understanding delusions in dementia.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
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".