Ankle mechanical impedance under muscle fatigue
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2014
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| Online Access: | http://hdl.handle.net/1721.1/83755 |
| _version_ | 1811084213446770688 |
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| author | Wang, Shuo, S.B. Massachusetts Institute of Technology |
| author2 | Neville Hogan. |
| author_facet | Neville Hogan. Wang, Shuo, S.B. Massachusetts Institute of Technology |
| author_sort | Wang, Shuo, S.B. Massachusetts Institute of Technology |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013. |
| first_indexed | 2024-09-23T12:47:05Z |
| format | Thesis |
| id | mit-1721.1/83755 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T12:47:05Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/837552019-04-11T09:05:48Z Ankle mechanical impedance under muscle fatigue Wang, Shuo, S.B. Massachusetts Institute of Technology Neville Hogan. Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering. Mechanical Engineering. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013. Cataloged from PDF version of thesis. Includes bibliographical references (pages 20-21). This study reports the effects of ankle muscle fatigue on ankle mechanical impedance. It suggests that decreasing ankle impedance with muscle fatigue may contribute to an increased probability of ankle injury. If confirmed, this observation may have important athletic, military and clinical implications. The experiment was designed to induce fatigue in the tibialis anterior and triceps surae muscle groups by instructing subjects to perform isometric contractions against a constant ankle torque generated by a backdrivable robot, Anklebot, which interacts with the ankle in two degrees of freedom. Median frequencies of surface electromyographic (EMG) signals collected from tibialis and triceps surae muscle groups were evaluated to assess muscle fatigue. Using a standard multi-input and multi-output stochastic impedance identification method, multivariable ankle mechanical impedance was measured in two degrees of freedom under muscle fatigue. Results indicate that ankle mechanical impedance decreases in both the dorsi-plantarflexion and inversion-eversion directions under tibialis muscle fatigue. However, the effect of triceps surae on ankle mechanical impedance is uncertain since the current experimental protocol could not effectively induce fatigue in triceps surae. by Shuo Wang. S.B. 2014-01-09T19:51:35Z 2014-01-09T19:51:35Z 2013 Thesis http://hdl.handle.net/1721.1/83755 864821447 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 21 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Wang, Shuo, S.B. Massachusetts Institute of Technology Ankle mechanical impedance under muscle fatigue |
| title | Ankle mechanical impedance under muscle fatigue |
| title_full | Ankle mechanical impedance under muscle fatigue |
| title_fullStr | Ankle mechanical impedance under muscle fatigue |
| title_full_unstemmed | Ankle mechanical impedance under muscle fatigue |
| title_short | Ankle mechanical impedance under muscle fatigue |
| title_sort | ankle mechanical impedance under muscle fatigue |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/83755 |
| work_keys_str_mv | AT wangshuosbmassachusettsinstituteoftechnology anklemechanicalimpedanceundermusclefatigue |