Grooved pegboard performance reflects specific symptomatic deficits in Parkinson's disease
Bibliographic record
Abstract
The current study evaluated the relationship between the grooved pegboard (GP) and upper limb motor symptoms in Parkinson's disease (PD). 125 individuals with PD from the SLF MDRC completed the GP and symptoms of PD were measured using the Unified PD Rating Scale (UPDRS I-III). For the analysis an average of two trials of the GP was used, following the procedure outlined by Bryden & Roy 2005, and included both a place and replace phase. If the GP was not completed in 5 minutes participants were stopped and a second trial was not performed. Correlation analysis of subsets of the UPDRS and GP phases were undertaken to evaluate the relationship between GP and PD symptoms. Side specific motor symptoms were correlated with both phases of the GP (place r=.507; replace r=.422) for the less affected but not the affected limb. This finding is in line with previous work that suggested the GP place phase is reflective of contralateral striatal neuron loss on the less affected side (Bohnen et al. 2007). Rigidity and UPDRS III had the strongest correlations with the GP place phase (r =.539 to .645) for both limbs, while tremor had no relationship with GP. This suggests the GP place phase reflects rigidity and bradykinesia, two cardinal symptoms of PD. Implications will be discussed with respect to the relationship between the complex visuomotor control in the GP place phase and functional deficits reported by individuals with PD. Acknowledgments: Research Support: Parkinson's Society of Canada
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".