Why not away? Moving towards a better understanding of apraxia in stroke
Bibliographic record
Abstract
Apraxia is a disorder involving the inability to pantomime or imitate hand gestures; scores for which are frequently derived individually and composite score calculated as performance metric. Such composite scores may obscure important differences among the gestures. Some work suggests movements in peri-personal space toward the body are made more quickly than those in extra-personal space. Furthermore, the aiming literature suggests that movements towards and away are fundamentally different. Therefore this study investigated whether pantomiming tool use was performed equally well if movements toward versus away from the body were assessed. Patients with stroke in the Left (LH) Hemisphere [N=54] or Right (RH) Hemisphere [N=49] were tested and compared to 28 healthy controls. The results indicate that pantomimes involving movement towards the body (Tweezers, Fork, Comb, and Toothbrush) were performed more accurately compared to pantomimes away from the body (Hammer, Knife, Watering Can, and Flipper). While the results revealed that the LH group was the least accurate in gesture performance, the effect of movement direction was comparable across the three groups. These findings support previous work showing the importance of movement direction in peripersonal spaces in determining the accuracy of movement. This direction effect however appears to be independent of apraxia severity, since the direction effect was comparable in LH apractic patients and the other two groups. Acknowledgments: NSERC, Heart and Stroke Foundation of Ontario
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 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 | 0.001 | 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) | 0.001 | 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 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".