Translational Value of Skilled Reaching Assessment in Clinical and Preclinical Studies on Motor Recovery After Stroke.
Eline C C van Lieshout, Julia Boonzaier, Adam J Pel and 5 others
PMID 33825580WHAT IT FOUND
Skilled reaching recovery followed a similar proximal-to-distal timeline in rats and humans.
In patients, this assessment correlated strongly with standard clinical measures like the Fugl-Meyer and Action Research Arm Test, supporting its use to distinguish true motor recovery from compensation.
Key findings
01Skilled reaching performance improved significantly over time in both humans and rats, showing early recovery of proximal movements and delayed recovery of distal muscles.
02In stroke patients, skilled reaching scores were strongly correlated with Fugl-Meyer and Action Research Arm Test scores at all time points.
03Skilled reaching assessment allows for distinction between compensation and recovery, unlike the Action Research Arm Test which focuses on task accomplishment.
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
Small sample size (12 humans, 17 rats). Patients and rats were part of ongoing trials testing rTMS, so the intervention may have influenced recovery profiles. Handedness was not considered due to few patients with dominant limb impairment. No kinematic assessment was performed, limiting sensitivity to subtle movement qualities. Lesion locations varied in humans but were confined to the sensorimotor cortex in rats.
Declared interests
The authors declared no potential conflicts of interest. The work was supported by the Netherlands Organization for Scientific Research.
The easy way to misread this
Do not assume that high scores on activity-based measures like the ARAT indicate true motor recovery. The study found that skilled reaching, which assesses movement quality, correlated with ARAT but revealed delayed distal recovery and potential compensation that the ARAT might mask.