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Analysis of free moment and center of pressure frequency components during quiet standing using magnitude squared coherence
- Source :
- Human Movement Science. 54:101-109
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- To date, no postural studies have investigated the specific relationship between linear (anteroposterior (AP) and mediolateral (ML)) postural sway and the free moment (FM) over the range of biomechanically important frequencies. The goal of the current paper is to study the relationship between FM and the AP/ML movements during quiet standing with respect to individual frequencies. Mean squared coherence, which measures the degree of the relationship between two signals as a function of frequency, is employed to address this question. The results showed that, in two conditions (eyes opened and eyes closed), at very low frequencies (0.5Hz), AP and FM were strongly correlated (0.8) while there was a weak correlation between ML and FM (∼0.2). The situation reversed from (0.5 to 1.5Hz), with AP/FM correlation decreasing, and ML/FM correlation peaking slightly below 1.0Hz. Both conditions were only weakly correlated beyond 1.5Hz. It is suggested that these observations arise from differences in ankle activation between the left and right sides, whereas at higher frequencies, high coherence between ML and FM is a hip control strategy.
- Subjects :
- Adult
Male
Rotation
Movement
Posture
Biophysics
Experimental and Cognitive Psychology
Magnitude squared coherence
Eye
Correlation
Young Adult
03 medical and health sciences
0302 clinical medicine
Optics
Center of pressure (terrestrial locomotion)
Pressure
medicine
Humans
Orthopedics and Sports Medicine
Postural Balance
Vision, Ocular
Mathematics
Models, Statistical
business.industry
Mathematical analysis
Signal Processing, Computer-Assisted
030229 sport sciences
General Medicine
Healthy Volunteers
Biomechanical Phenomena
Weak correlation
medicine.anatomical_structure
Linear Models
Visual Perception
Female
Ankle
business
Ankle Joint
030217 neurology & neurosurgery
Quiet standing
Subjects
Details
- ISSN :
- 01679457
- Volume :
- 54
- Database :
- OpenAIRE
- Journal :
- Human Movement Science
- Accession number :
- edsair.doi.dedup.....242e8558184f0eb528a204b9d103339a