Cancer survivors post-chemotherapy exhibit unique proprioceptive deficits in proximal limbs.
Allison B Wang, Stephen N Housley, Ann Marie Flores and 2 others
PMID 35321749WHAT IT FOUND
Cancer survivors treated with oxaliplatin showed specific deficits in matching force without visual feedback, but not in reaching or posture.
These proximal proprioceptive errors correlated with self-reported motor dysfunction, suggesting force matching may be a more sensitive clinical measure than standard distal symptom surveys.
Key findings
01Survivors had significantly less accurate force matching than controls when visual feedback was removed, indicating a deficit in proprioceptive use of the proximal limbs.
02Deficits in force matching accuracy and precision were strongly correlated with patient-reported motor dysfunction, but not with sensory symptoms or chemotherapy dosage.
03Standard clinical surveys focus on distal sensory symptoms, but this study found that proximal proprioceptive deficits exist independently of those distal issues.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The sample size was small (13 per group). Participants had mild symptoms; the study excluded patients with severe functional deficits, so findings may not apply to those with more advanced neuropathy. The tasks emphasized proximal joints, but cutaneous input from the hand and forearm could not be fully eliminated. The study did not measure strength or fatigue directly, so deficits could partly reflect weakness or fatigue rather than pure proprioceptive loss.
Declared interests
Funded by the National Institutes of Health and Northside Hospital Foundation, Inc. No conflicts of interest declared by the authors.
The easy way to misread this
Do not assume these deficits are caused by the cumulative dose of chemotherapy, as the study found no correlation between force matching errors and total drug dosage. The deficits appear to be a specific motor-propriceptive issue rather than a general dose-dependent neuropathy.