Stretch reflex behavior of spastic ankle under passive and active conditions
Bibliographic record
Abstract
A parallel-cascade system identification method was used to measure dynamic ankle stiffness in normal and spastic spinal cord injured (SCI) subjects. Modulation of reflex stiffness gain of the ankle extensor muscles (GS) was studied by applying perturbations to the ankle at different positions under passive (relaxed) and active (10% extensor maximum voluntary contraction) conditions. In SCI subjects: (1) modulation of reflex gain with ankle position was abnormal in both passive and active conditions; (2) reflex stiffness gain was always significantly higher than in normal subjects; (3) reflex gain was similar under active and passive conditions except at plantarflexion where reflex gain was slightly higher under active conditions; (4) the reflex latency was shorter. The findings demonstrate that the reflex mechanics are abnormal in SCI spastic patients. The abnormalities are likely due not only to a decrease in presynaptic inhibitory mechanisms but also to a disruption in the motoneuron recruitment order.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 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) | 0.005 | 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".