Motor coordination during body rotation while standing in healthy participants.
Makoto Suzuki, Hiroyuki Fujisawa, Hiroto Suzuki and 3 others
PMID 30154589WHAT IT FOUND
Healthy adults turning while standing moved the head and neck most, then the pelvis, and the thoracolumbar joint had the smallest final angle.
This gives PTs a healthy reference pattern.
Key findings
01Final angles of eye movement, head and neck rotation, thoracolumbar rotation, and pelvic rotation differed across target angles.
02For all target angles, head and neck movement showed the largest angular change.
03The coordination relationship between head and neck and thoracolumbar joints was nonlinear, while the relationship between thoracolumbar and pelvic joints was linear.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The participants were 22 healthy adults with no visual problems or history of diseases that could compromise body rotation, so it does not describe people with conditions that may limit rotation. All turns were to the right, so left rotation was not measured. Feet were fixed and each target was turned to once, so it does not show how people turn during walking or repeated daily movement. The study describes healthy coordination; it does not test an intervention or clinical dysfunction.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not read these joint-angle patterns as proof that a therapy improves rotation. The study measured healthy adults performing single target turns, not patients receiving treatment.