Cescon, Corrado and Temporiti, Federico and De Capitani, Francesca and Adamo, Paola and Natali, Fabrizio and Barbero, Marco (2020) Helical axis analysis for the evaluation of knee joint kinematics during gait. In: ISEK 2020 Congress - XXIII Congress of the International Society of Electrophysiology and Kinesiology, July 12-14 2020, Nagoya, Japan.
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Abstract
BACKGROUND AND AIM: Knee joint is characterized by poor congruence among its articular surfaces leading to continuous displacement of joint rotation center during movements. The instantaneous center of rotation of the joint can be estimated in vivo through the analysis of the distribution of helical axes (HAs), which can be considered an index of joint stability. HAs dispersion depends on the morphology of articular surfaces as well as on the muscular activity. The neuromuscular functions are often compromised in older asymptomatic adults. In addition, HAs can be analyzed not only during simple movements, but also during functional tasks such as walking. Therefore, the aim of this study was to describe knee HAs dispersion during walking in young and elderly healthy subjects. METHODS: Forty healthy volunteers were enrolled in the study (20 young: age 23.3ą2.4 years and 20 elderly: age 2020 ISEK Virtual Congress Poster Abstract Booklet 24 69.3ą4.9 years). Participants were asked to walk on a treadmill at spontaneous speed with reflective markers placed on thighs and shanks in order to detect kinematics with an optoelectronic system (SMART DX, BTS, Italy). Knee kinematics was described during the following gait phases: 1) flexion from 95% and 10% of gait cycle, 2) extension from 10% to 40% of gait cycle, 3) flexion from 40% to 70% of gait cycle, 4) extension from 70% to 95% of gait cycle. Mean Distance (MD) and Mean Angle (MA) were computed in reference to sagittal, frontal and transversal plane during each phase. RESULTS: Table 1 shows the results. Young subjects revealed lower MD on sagittal plane during phase 1 (p<0.001) with respect to elderly. Moreover, young subjects showed lower MA on sagittal plane during phases 1 (p<0.001) and 2 (p<0.001) compared to elderly subjects. Finally, all participants showed greater MD and MA on sagittal and frontal planes during phases 1 and 2 compared to phases 3 and 4. CONCLUSIONS: Young subjects showed lower HAs dispersion during walking. Moreover, all subjects revealed greater HAs dispersion during the stance phase of gait cycle. These findings could be explained through lower neuromuscular control during walking in elderly, especially when the transversal component of the articular forces is greater, and by mean of joint degeneration described in elderly.
| Item Type: | Article in conference proceedings or Presentation at a conference (Poster) |
|---|---|
| Subjects: | Engineering > General engineering > Bioengineering, biomedical engineering & clinical engineering |
| Department/unit: | Dipartimento economia aziendale, sanità e sociale > Laboratorio di ricerca in riabilitazione |
| Depositing User: | Corrado Cescon |
| Date Deposited: | 06 Feb 2024 06:36 |
| Last Modified: | 06 Feb 2024 06:40 |
| URI: | http://repository.supsi.ch/id/eprint/14960 |
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