Differences in lower limb kinematics and kinetics between individuals with posterior tibial tendon dysfunction and healthy controls during step-up and step-down tasks
Bibliographic record
Abstract
Posterior tibial tendon dysfunction (PTTD) is a debilitating condition with multifactorial etiologies that leads to functional limitations, including biomechanical deficits in the lower limb. Previous studies have focused on gait biomechanics in patients with PTTD during walking; however, examining lower extremity biomechanics during other essential daily activities, such as step-up and step-down tasks, is crucial for understanding the functional limitations associated with PTTD. This case-control study compared lower limb kinematics and kinetics between individuals with PTTD (n = 16) and healthy controls (n = 16) during step-up, step-down, and step-down on a medially inclined surface tasks. A 12-camera motion capture system was utilized to record three-dimensional movements of the pelvis and lower limb, while a force plate measured ground reaction forces. Hip, knee, ankle, and midfoot angles and moments were analyzed across groups using one-dimensional statistical parametric mapping. Between-group differences were consistent across tasks. Individuals with PTTD exhibited greater midfoot dorsiflexion/inversion/external rotation, ankle eversion/plantarflexion, and hip flexion angles, as well as midfoot plantarflexion/inversion moments than healthy controls. Overall, individuals with PTTD exhibited distinct movement patterns in their lower extremities compared to healthy individuals. These altered biomechanical patterns may increase stress on adjacent joints and tissues, potentially worsening the condition and heightening the risk of further injuries. These findings will contribute to the development and enhancement of rehabilitation protocols for individuals with PTTD, aiming to improve function, reduce pain, and prevent injury.
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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 | 0.001 | 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) | 0.000 | 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".