Lower limb pointing to assess intersegmental dynamics after incomplete spinal cord injury and the associated role of proprioceptive impairments.
Raza N Malik, Daniel S Marigold, Mason Chow and 2 others
PMID 39955608WHAT IT FOUND
People with incomplete spinal cord injury used different muscle strategies than controls to point their toe, even when the movement looked accurate.
Poorer ability to detect movement speed, not joint position, correlated with these compensatory strategies.
Key findings
01Individuals with SCI showed altered hip and knee muscle torque compared to controls, particularly when stabilizing one joint while moving another.
02Deficits in movement detection sense, but not joint position sense, were associated with these altered motor strategies in the SCI group.
03End-point accuracy differences between groups were minimal, meaning visible movement error did not reflect the underlying motor control differences.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
Small sample size (16 SCI participants). The vision obstruction condition had little effect because the target remained visible, limiting conclusions about visual reliance. Muscle torque calculations include passive tissue effects, so it is unclear how much of the strategy is due to active muscle contraction versus passive stiffness.
Declared interests
Funded by the University of British Columbia and the Canadian Institutes of Health Research. No specific conflicts of interest were declared in the text.
The easy way to misread this
Do not conclude that proprioceptive training for joint position sense will fix these motor strategies. The study found that movement detection sense, not joint position sense, was associated with the altered muscle torques.