The course of cervical dystonia with head tremor during botulinum toxin type A treatment
Bibliographic record
Abstract
Objective : to evaluate the efficacy and safety of botulinum toxin type A (BTA) injections into the neck muscles to reduce dystonic postures, head tremor, and pain syndrome in patients with cervical dystonia (CD) within the first 8 cycles of treatment. Patients and methods. The investigation included 76 patients (26 (34%) men and 50 (66%) women) with CD and dystonic head tremor, who were given BTA injections into the neck muscles for the first time. All the 76 patients received at least one cycle of BTA therapy. At the same type, 18 of these patients received 4 cycles of injections and 36 patients had 8 cycles. Injections were given when the symptoms of CD recurred or increased and the patient needed to be retreated. The interval between the injection cycles was arbitrary, but not less than 12 weeks. The doses of BTA agents per treatment cycle were as follows: Dysport was 400 to 1000 U, xeomin was 50 to 300 U, and Botox 200 to 300 U. The symptoms of CD were assessed using the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) and the Tsui scale before the first injection of BTA and injection cycles 4 and 8; the presence or absence of head tremor was recorded. Results. The TWSTRS severity of CD symptoms decreased from 38 [36; 41] to 30 [27; 33] scores by injection cycle 4 (p < 0.001) and to 26 [23; 27] scores by cycle 8 (p<0.01). The Tsui severity of CD reduced from 9.3 [9; 10] to 7.2 [7; 8] scores by injection cycle 4 (p<0.001) and to 6.7 [6; 7] scores by cycle 8. The Tsui tremor scores decreased from 1.9 [1.6; 2.1] to 1.4 [1.1; 1.6] scores by injection cycle 4 and to 1.1 [0.9;1.4] scores by cycle 8 (p<0.01). Tremor completely disappeared in 6 (11%) of patients by injection cycle 4 and in 6 (18%) patients by cycle 8. According to Section 3 of the TWSTRS, pain intensity was reduced from 9.9 [8.9; 11.0] to 5.0 [3.3; 6.6] scores by injection cycle 4 (p<0.001) and to 2.1 [0.7; 3.6] scores by cycle 8 (p < 0.01); pain regressed completely in 12 (41%) and 9 (64%) patients by cycles 4 and 8, respectively. Conclusion. BTA injections into the neck muscles are an effective treatment for CD symptoms, such as dystonic tremor, posture, and pain. Successive injection cycles have a cumulative effect that is more marked by injection cycle 8. It is appropriate to prescribe longer treatment cycles to patients with CD and head tremor. Dystonic head tremor, unlike dystonic postures, may regress fully after BTA injections
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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 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".