Clinical and neurophysiological features of the augmentation phenomenon in restless legs syndrome
Bibliographic record
Abstract
Anxiety and depressive disorders are common in restless legs syndrome (RLS); in some cases, the disease is accompanied by cognitive impairment and a deterioration in quality of life. The most important treatment method for RLS is the use of dopaminergic medications. In some cases, the use of these drugs leads to a complication - the phenomenon of augmentation, which manifests itself in an increase in RLS symptoms as the dose of medication increases. Objective : to determine the clinical and neurophysiological characteristics of RLS patients with the augmentation phenomenon. Material and methods . 40 patients with RLS were examined: 20 with augmentation (main group, MG; 5 men and 15 women) and 20 without augmentation (comparison group, CG; 7 men and 13 women). The median age of the patients in the MG was 63.5 [56; 71] years, and 62.0 [43.5; 71.5] years in the CG. Clinical assessment was performed using the RLS Severity Rating Scale (RS), Montreal Cognitive Assessment Scale (MoCA), Beck Anxiety Inventory, Beck Depression Inventory, Quality of Life Scale (SF-36), Insomnia Severity Index (ISI), Trail Making Test (Part A), Trail Making Test (part B), phonemic and semantic speech activity tests. All patients underwent suggested immobilization test (SIT) to assess the urge to move on a 10-point numerical rating scale (NRS) and periodic limb movements (PLM) while awake, as well as a polysomnographic examination. Results . Augmentation significantly more frequently resulted in an expansion of the area of distribution of the urge to move and other unpleasant sensations over the entire surface of the legs (p=0.01), painful discomfort in the legs (p=0.001), early onset of symptoms (04:00—18:00; p=0.04), shortening of the latency period for the onset of symptoms (p=0.001), twitching in the legs while awake (p=0.04), taking higher doses of dopaminergic medications (p=0.004). In augmentation, the MoCA score is lower (p=0.01), such patients use fewer words in the semantic speech activity test (p=0.049), have a higher score on the RS (p=0.001) and ISI (p=0.02), a greater number of PLMs while awake according to SIT (p=0.01) compared to CG. No significant differences were found between groups in terms of age, gender, ferritin level, total score on the Beck Anxiety and Depression Inventory, SF-36 Quality of Life Scale, Trail Making Test (Part A), Trail Making Test (part B), phonemic speech activity test, polysomnography indicators (including motor activity during sleep). Conclusion . From a clinical and neurophysiological point of view, the phenomenon of augmentation is not simply a manifestation of a more severe course of RLS but has features that reflect the pathogenesis of this disorder. During augmentation, patients tend to describe the sensations as painful and their involuntary motor activity increases. This reflects changes in the activity of the diencephalospinal tract due to excessive dopaminergic stimulation.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| 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".