Chronic Subdural Hematoma Presenting as Insidious Onset Unilateral Involuntary Movements
Bibliographic record
Abstract
With the average age in Western countries continuing to rise, chronic subdural hematoma (cSDH) has emerged as an increasingly common neurological condition in these countries. The condition is particularly prevalent among the elderly, with a markedly higher incidence in individuals over 65 years of age. We present the case of a 79-year-old female who developed left-sided choreiform movements or hemiballismus several days after a minor fall. Initial imaging revealed no acute findings; however, delayed magnetic resonance imaging revealed a small chronic right-sided subdural collection. Notably, the patient’s symptoms gradually improved over a 6-month period. Overall, this case illustrates that cSDH can present with delayed-onset hyperkinetic movements, likely through biochemical or microvascular effects on cortical function rather than solely mechanical pressure. It underscores the importance of considering cSDH in the differential diagnosis for delayed-onset movement disorders and highlights the value of follow-up imaging and clinical monitoring, even after seemingly minor trauma.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot 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.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".