Patellar movement perception related to a backward-leaning standing position.
Hitoshi Asai, Yuito Odashiro, Pleiades Tiharu Inaoka
PMID 28878465WHAT IT FOUND
When the patella moved during backward leaning, people reported feeling it in 90.9% of trials; when it did not, 66.7%.
This lab finding in 12 healthy adults does not support a balance treatment.
Key findings
01Patellar movement during backward-leaning standing was confirmed in 8 of 12 participants in all four trials, and the mean movement range was 9.5 mm.
02When patellar movement was confirmed, participants perceived it in 90.9% of trials; when it was not, they perceived it in 66.7%, a significant difference.
03When participants started with quadriceps contraction, the perceived rate was 77.0%, significantly lower than in relax-start patellar movement trials.
STILL TO COME
How it was doneWhat they found
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What it does not show
Twelve healthy young adults without neurological or orthopedic problems were tested, so it does not show what happens in patients with balance problems. Only four trials were done in each condition to limit X-ray exposure, so the perception rates come from a small number of observations. The study measured standing position perception in the laboratory, not a therapy. Some participants did not show patellar movement, and perception was still reported in many non-movement trials, so the cue may be ambiguous.
The easy way to misread this
Do not read this as evidence that patellar movement can be trained or assessed to improve balance. The study was a small lab experiment in 12 healthy adults, used X-ray and a switch press, and did not test patients or treatment.