Principal component analysis: Joint kinematics features during overground walking in elderly fallers...9th World Conference of the International Society for Gerontechnology (ISG), June 18-21, 2014, Taipei, Taiwan.
Purpose Falls by the elderly are a major public health problem all over the world1. A recent study reported that the variability of minimum toe clearance (MTC) is positively correlated with the variability of joint angles at the instance of MTC2. However, this study only analyzed the relationship be...
| Publicado en: | Gerontechnology Vol. 13; no. 2; pp. 225 - 226 |
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| Autores principales: | , , |
| Formato: | abstract proceedings research tables/charts Journal Article |
| Publicado: |
International Society for Gerontechnology
2014 Special Issue
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=180444861&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 180444861 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15691101 904R jtl: Gerontechnology issn: 15691101 maglogo: N pubinfo: dt: 2014 Special Issue vid: 13 iid: 2 pid: 54298 pub: International Society for Gerontechnology artinfo: ui: 180444861 180444861 180444861 10.4017/gt.2014.13.02.203.00 180444861 ppf: 225 ppct: 1 formats: tig: atl: Principal component analysis: Joint kinematics features during overground walking in elderly fallers...9th World Conference of the International Society for Gerontechnology (ISG), June 18-21, 2014, Taipei, Taiwan. aug: au: KOBAYASHI, Y. HOBARA, H. MOCHIMARU, M. affil: National Institute of Advanced Industrial Science and Technology, Tokyo, Japan sug: subj: Kinematics Gait Accidental Falls Risk Factors Risk Assessment Ankle Joint Physiology Hip Joint Physiology Congresses and Conferences Taiwan Taiwan Aged Aged: 65+ years ab: Purpose Falls by the elderly are a major public health problem all over the world1. A recent study reported that the variability of minimum toe clearance (MTC) is positively correlated with the variability of joint angles at the instance of MTC2. However, this study only analyzed the relationship between MTC and joint kinematics at the instance of MTC. Therefore, how the risk of falls is related to joint kinematics of the lower limb at each instance of entire gait cycle remains unknown. The objective of present study was to identify the key characteristics of joint kinematics of gait as it is related to the risk of falls when a participant is walking. Method Joint kinematics data were obtained from 18 participants who had recently fallen and 19 who had not; data were analyzed using principal component analysis (PCA). PCA has been conducted on the input matrix that was constructed from time-normalized lower limb joint angle average data and standard deviation of three planes (101 data pointsxtwo parametersxthree anglesxthree planes). Results & Discussion As a result, PCA identified only five principal component vectors (PCV) of more than 20 PCVs generated related to fall risk. These results indicate that joint kinematics related to the five PCVs are the key characteristics of joint kinematics during walking that are relate to fall risk. Therefore, we recombined the joint kinematics corresponding to the five PCVs, and identified larger joint kinematics variability from the late stance to the early swing phase for those patients who had a history of falling compared to those who had not fallen regardless of joints (Figure 1). Further, those who had previously fallen tended to show smaller hip flexion and ankle dorsi-flexion angle, and larger ankle inversion angle during the mid to late-stance phases, and a smaller hip abduction angle during the mid-stance phase which must result to a smaller toe clearance (Figure 2). A previous study reported that special garments could enhance the joint position senses3. Hence, both present and past findings3-6 suggest that a reduction of the variability in joint kinematics during the late stance to early swing phase through the use of special garments or footwear may reduce the risk of falls. pubtype: Academic Journal doctype: abstract proceedings research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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