Increased vestibular contribution to posture control in individuals with chronic headache
Bibliographic record
Abstract
OBJECTIVE: Numerous studies have identified an association between headache disorders and vestibular symptoms, such as dizziness, vertigo, and motion sensitivity. Using bipolar, binaural galvanic vestibular stimulation (GVS), our objectives were to (1) determine the degree of vestibular sensitivity in borderline headache sufferers, and (2) characterize the postural response to vestibular perturbation in these individuals. METHODS: Fourteen volunteers participated in this study: 8 individuals with chronic headache (6 with migraine and 2 with tension type headache (TTH)), and 6 healthy control subjects. Thirty trials of 15-second duration were conducted across 6 conditions (GVS left (L) or right (R), or no stimulation (No GVS) with either eyes open (EO) or eyes closed (EC)). Peak medial-lateral (M-L) centre of pressure (CoP) was calculated during quiet stance. RESULTS: Headache subjects demonstrated significantly higher peak displacement of the M-L CoP than control subjects (p=0.0461). Although peak M-L CoP in both the EO (p = 0.0753) and EC (p=0.09623) visual conditions were not significantly different between headache sufferers compared to healthy controls, there is some suggestion that people with chronic headache may use vestibular information to a greater extent and that the presence of vision may not sufficiently compensate for vestibular induced instability. The initial push M-L CoP was not significantly different between groups, suggesting different sensory contributions for the initial and latter response to GVS. CONCLUSIONS: People with chronic headache exhibit increased postural sway, which may reflect the re-weighting of sensory information with an increased vestibular and a reduced visual contribution to postural control. SIGNIFICANCE: These results support existing research on vestibular abnormalities in chronic headache sufferers that may provide a basis for future treatment therapies.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.002 | 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".