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Perception of leaning backward while standing and patellar movement.
Hitoshi Asai1, Kazuya Hirayama2, Yuji Azuma3
1Department of Physical Therapy, Graduate Course of Rehabilitation Science, School of Health Sciences, College of Medical, Pharmaceutical, and Health Sciences, Kanazawa University: 5-11-80 Kodatsuno, Kanazawa-shi, Ishikawa 920-0942, Japan.
Journal of Physical Therapy Science
|September 22, 2017
Summary
Individuals with upward patellar movement during backward leaning accurately perceive their standing position near the onset of this movement. This suggests sensory information changes significantly at patellar movement onset.
Area of Science:
- Biomechanics
- Human Movement Analysis
- Sensory Perception
Background:
- Understanding postural control and sensory feedback is crucial for preventing falls.
- Patellar movement during postural adjustments may influence proprioception.
Purpose of the Study:
- To examine the correlation between patellar movement and the ability to perceive postural changes during backward leaning.
- Investigate how patellar motion affects the perception of standing position.
Main Methods:
- Fourteen volunteers with observed upward patellar movement during backward leaning were recruited.
- Measured center of pressure (CoP) in the anteroposterior direction (%FL) at quiet standing and at the onset of patellar movement.
- Assessed standing position perceptibility.
Main Results:
- Quiet standing CoP was at 43.2%FL; patellar movement onset occurred at 35.1%FL.
- The standard deviation for onset position was a small 2.5%FL.
- Perceptual accuracy was significantly high near the patellar movement onset position.
Conclusions:
- Subjects accurately perceived their standing position near the onset of patellar movement during backward leaning.
- This accurate perception is likely due to altered sensory information linked to the initiation of patellar movement.