Characterizing Pelvis Dynamics in Adolescent With Idiopathic Scoliosis
Bibliographic record
Abstract
STUDY DESIGN: Pelvic dynamic analysis in adolescents with idiopathic scoliosis (AIS). OBJECTIVE: To examine and characterize pelvis dynamics in AIS. SUMMARY OF BACKGROUND DATA: Although studies have examined spine and pelvis postural differences between female adolescents with and without scoliosis much is still unknown about the dynamics of pelvis in trunk-pelvic interaction and how the type of scoliosis compromises pelvic mobility consequently affecting the overall dynamics of the trunk-pelvis kinematic chain. METHODS: A total of 25 female AIS (18 right thoracic: RT and 7 right thoracic-left lumbar: RTLL) and 12 controls were recruited. Reflective markers were placed on the trunk and pelvis and their trajectories were recorded using a 5-camera motion capture system. Three trials were carried out, one for each of the various trunk-pelvis movements (flexion/extension, lateral bend, and axial rotation on either side) performed by the subjects. RESULTS: Pelvic alignment in the 3 planes were significantly different for all movement types (P < 0.001), with distinct differences in pelvic sagittal tilt and transverse plane rotation, particularly during lateral bending and axial rotation in patients with RT and LL curves (P = 0.035, P = 0.006, respectively). A majority of the patients from the 2 scoliotic groups had the pelvis rotated to the side of the major curve (right). Although RT subjects had similar dynamic pelvic responses as the controls, the RT-LL patients had relatively more pelvic sagittal tilt during lateral bending and axial rotation toward the major curve. CONCLUSION: In AIS, the initial three-dimensional alignment of the pelvis (sagittal and frontal tilt, transverse plane rotation) plays an essential role in dictating the biomechanics of the pelvis for any movement type. A spatial concurrency in pelvic alignment was noted wherein a change in 1 parameter will affect the remaining 2. Increased pelvic sagittal tilt in the RT-LL subjects was substituted by more pelvic rotation in the RT subjects during trunk flexion/extension. Differences in pelvic dynamics in AIS are not evident in discrete parameters, for example, total ranges-of-motion but more so in its biomechanics during the movement, which in turn is dictated by the initial alignment of the pelvis.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 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".