Three-dimensional range of motion of the clavicle, scapula, and humerus during functional reach in adults aged 45–75
Bibliographic record
Abstract
Background: Given the limited data regarding three-dimensional clavicular/scapular/humeral rotations of pain-free shoulders in older adults, additional data is required for surgical planning and rehabilitation goal-setting in this population. This observational study aims to provide normative data regarding three-dimensional clavicular/scapular/humeral range required for daily activities in 45-75 year-old individuals. Methods: = 40 shoulders) for 45-75 year-old participants. Clavicular/scapular/humeral rotations that contributed to the total angle of humeral elevation in flexion, abduction, and during hand-to-head reaching were calculated. Results: Specific movement patterns were identified in each of the six reaching positions. Normative data for "clavicular elevation:scapular lateral rotation:humeral elevation" ratios were 1°:2°:9° (flexion), 1°:3°:10° (hand-to-head; scapular-plane humeral elevation), and 1°:3°:11° (abduction). Discussion: Coronal plane clavicular/scapular/humeral rotations contributed to arm elevation height. Transverse plane rotations contributed to positioning the arm toward/away from midline. Sagittal plane clavicular/scapular/humeral rotations contributed to arm positioning in-front/behind the body and subacromial joint alignment. This normative data regarding simultaneous three-dimensional clavicular/scapular/humeral rotations during functional reach enables comparative analysis when evaluating shoulder pain/pathology in older adults.
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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 | 0.001 |
| 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".