Quantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar part
The purpose of this study is to propose the quantitative evaluation indices for the hemiplegic gait characteristics by accelerometers attached to the right and left lumbar part. Subjects are 16 patients with hemiplegia, 8 males and 8 females whose ages are from 46 to 83 years. Twenty-six healthy adu...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2018-08-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00238/_pdf/-char/en |
| _version_ | 1798015095171710976 |
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| author | Masahiro YONEDA Kanji FUKUDA Michimasa OI Ayumi MITSUHASHI Atsushi NISHIDA Masahiro MATSUDA Maki ITOKAZU |
| author_facet | Masahiro YONEDA Kanji FUKUDA Michimasa OI Ayumi MITSUHASHI Atsushi NISHIDA Masahiro MATSUDA Maki ITOKAZU |
| author_sort | Masahiro YONEDA |
| collection | DOAJ |
| description | The purpose of this study is to propose the quantitative evaluation indices for the hemiplegic gait characteristics by accelerometers attached to the right and left lumbar part. Subjects are 16 patients with hemiplegia, 8 males and 8 females whose ages are from 46 to 83 years. Twenty-six healthy adults also participated as a control group. An FFT analysis for both hemiplegic gait and healthy normal walking test results is carried out paying attention to the component with frequency of 0.5fw (half frequency component of the gait cycle fw) . Based on these analytical results, it is revealed that the component with frequency of 0.5fw in the fore and after direction is obviously prominent for the hemiplegic gait compared with measured values of healthy normal gait. The parameter PR is defined as the power spectrum ratio of 0.5fw to fw component. The relationship between gait stage (GS) and PR is investigated for both subjects of hemiplegic patients and healthy adults. Dynamic load factor (DLF) corresponding to the vertical walking force and lateral displacement of the waist are also calculated using power spectrum density for time history signals measured by the accelerometers. This led to the conclusion that the parameter PR in the fore and after direction, DLF in the vertical direction and lateral displacement of the waist are the useful evaluation indices for the hemiplegic gait analysis from the viewpoint of rehabilitation medicine. |
| first_indexed | 2024-04-11T15:28:54Z |
| format | Article |
| id | doaj.art-4abcd290541545eda7ffd1de91536bec |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T15:28:54Z |
| publishDate | 2018-08-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-4abcd290541545eda7ffd1de91536bec2022-12-22T04:16:11ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612018-08-018486518-0023818-0023810.1299/transjsme.18-00238transjsmeQuantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar partMasahiro YONEDA0Kanji FUKUDA1Michimasa OI2Ayumi MITSUHASHI3Atsushi NISHIDA4Masahiro MATSUDA5Maki ITOKAZU6Department of Civil and Environmental Engineering, Kindai UniversityDepartment of Rehabiritation Medicine, Kindai UniversitySeikyo-yao ClinicHigashi-osaka Seikyou HospitalHigashi-osaka Seikyou HospitalHigashi-osaka Seikyou HospitalDepartment of Rehabiritation Medicine, Kindai UniversityThe purpose of this study is to propose the quantitative evaluation indices for the hemiplegic gait characteristics by accelerometers attached to the right and left lumbar part. Subjects are 16 patients with hemiplegia, 8 males and 8 females whose ages are from 46 to 83 years. Twenty-six healthy adults also participated as a control group. An FFT analysis for both hemiplegic gait and healthy normal walking test results is carried out paying attention to the component with frequency of 0.5fw (half frequency component of the gait cycle fw) . Based on these analytical results, it is revealed that the component with frequency of 0.5fw in the fore and after direction is obviously prominent for the hemiplegic gait compared with measured values of healthy normal gait. The parameter PR is defined as the power spectrum ratio of 0.5fw to fw component. The relationship between gait stage (GS) and PR is investigated for both subjects of hemiplegic patients and healthy adults. Dynamic load factor (DLF) corresponding to the vertical walking force and lateral displacement of the waist are also calculated using power spectrum density for time history signals measured by the accelerometers. This led to the conclusion that the parameter PR in the fore and after direction, DLF in the vertical direction and lateral displacement of the waist are the useful evaluation indices for the hemiplegic gait analysis from the viewpoint of rehabilitation medicine.https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00238/_pdf/-char/enhemiplegic gaitquantitative evaluation indexaccelerometerfft analysisrehabilitation medicine |
| spellingShingle | Masahiro YONEDA Kanji FUKUDA Michimasa OI Ayumi MITSUHASHI Atsushi NISHIDA Masahiro MATSUDA Maki ITOKAZU Quantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar part Nihon Kikai Gakkai ronbunshu hemiplegic gait quantitative evaluation index accelerometer fft analysis rehabilitation medicine |
| title | Quantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar part |
| title_full | Quantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar part |
| title_fullStr | Quantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar part |
| title_full_unstemmed | Quantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar part |
| title_short | Quantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar part |
| title_sort | quantitative evaluation indices for hemiplegic gait characteristics based on power spectrum density for time history signals measured by accelerometers attached to the lumbar part |
| topic | hemiplegic gait quantitative evaluation index accelerometer fft analysis rehabilitation medicine |
| url | https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00238/_pdf/-char/en |
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