Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions
Stretch reflex is an important factor that influences the biomechanical response of the human body under whole-body vibration. However, there is a lack of quantitative evaluation at lower frequencies. Thus, the aim of this study was to investigate the effects of vibration on the stretch reflex and,...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Applied Bionics and Biomechanics |
| Online Access: | http://dx.doi.org/10.1155/2019/1971045 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832556305415405568 |
|---|---|
| author | Chaofei Zhang Wenjun Wang Dennis Anderson Sishu Guan Guofa Li Hongyi Xiang Hui Zhao Bo Cheng |
| author_facet | Chaofei Zhang Wenjun Wang Dennis Anderson Sishu Guan Guofa Li Hongyi Xiang Hui Zhao Bo Cheng |
| author_sort | Chaofei Zhang |
| collection | DOAJ |
| description | Stretch reflex is an important factor that influences the biomechanical response of the human body under whole-body vibration. However, there is a lack of quantitative evaluation at lower frequencies. Thus, the aim of this study was to investigate the effects of vibration on the stretch reflex and, in particular, to explore the quantitative relationship between dynamic muscle responses and low-frequency vibrations. The gastrocnemius muscle of 45 Sprague-Dawley rats was dissected. Sinusoidal vibrations of five discrete frequencies (2~16 Hz) with peak-to-peak amplitudes of 1 mm were applied to the gastrocnemius muscles with 2 mm or 3 mm prelengthening. Variables including dynamic muscle force, vibration acceleration, and displacement were recorded in two conditions, with and without the stretch reflex. Results showed that the dynamic muscle forces decreased by 20% on average for the 2 mm prelengthening group after the stretch reflex was blocked and by 24% for the 3 mm prelengthening group. Statistical analysis indicated that the amplitude of dynamic muscle force in the “with stretch reflex” condition was significantly larger than that in the “without stretch reflex” condition (p<0.001). The tension-length curve was found to be a nonlinear hysteresis loop that changed with frequency. The phase difference between the dynamic muscle force and the length change was affected significantly by vibration frequency (p<0.01), and the minimum frequency was 4–8 Hz. Experimental results of this study could benefit musculoskeletal model by providing a theoretical support to build a stretch reflex model for low-frequency vibration. |
| format | Article |
| id | doaj-art-e686e627584e4fed92f0ab006cd1637a |
| institution | Kabale University |
| issn | 1176-2322 1754-2103 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied Bionics and Biomechanics |
| spelling | doaj-art-e686e627584e4fed92f0ab006cd1637a2025-02-03T05:45:49ZengWileyApplied Bionics and Biomechanics1176-23221754-21032019-01-01201910.1155/2019/19710451971045Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact ConditionsChaofei Zhang0Wenjun Wang1Dennis Anderson2Sishu Guan3Guofa Li4Hongyi Xiang5Hui Zhao6Bo Cheng7State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, ChinaCenter for Advanced Orthopedic Studies, Beth Israel Deaconess Medical Center, Boston, MA 02215, USAChongqing Key Laboratory of Vehicle/Biological Crash Security, Department 4th, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, ChinaInstitute of Human Factors and Ergonomics, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, ChinaChongqing Key Laboratory of Vehicle/Biological Crash Security, Department 4th, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, ChinaChongqing Key Laboratory of Vehicle/Biological Crash Security, Department 4th, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, ChinaState Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, ChinaStretch reflex is an important factor that influences the biomechanical response of the human body under whole-body vibration. However, there is a lack of quantitative evaluation at lower frequencies. Thus, the aim of this study was to investigate the effects of vibration on the stretch reflex and, in particular, to explore the quantitative relationship between dynamic muscle responses and low-frequency vibrations. The gastrocnemius muscle of 45 Sprague-Dawley rats was dissected. Sinusoidal vibrations of five discrete frequencies (2~16 Hz) with peak-to-peak amplitudes of 1 mm were applied to the gastrocnemius muscles with 2 mm or 3 mm prelengthening. Variables including dynamic muscle force, vibration acceleration, and displacement were recorded in two conditions, with and without the stretch reflex. Results showed that the dynamic muscle forces decreased by 20% on average for the 2 mm prelengthening group after the stretch reflex was blocked and by 24% for the 3 mm prelengthening group. Statistical analysis indicated that the amplitude of dynamic muscle force in the “with stretch reflex” condition was significantly larger than that in the “without stretch reflex” condition (p<0.001). The tension-length curve was found to be a nonlinear hysteresis loop that changed with frequency. The phase difference between the dynamic muscle force and the length change was affected significantly by vibration frequency (p<0.01), and the minimum frequency was 4–8 Hz. Experimental results of this study could benefit musculoskeletal model by providing a theoretical support to build a stretch reflex model for low-frequency vibration.http://dx.doi.org/10.1155/2019/1971045 |
| spellingShingle | Chaofei Zhang Wenjun Wang Dennis Anderson Sishu Guan Guofa Li Hongyi Xiang Hui Zhao Bo Cheng Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions Applied Bionics and Biomechanics |
| title | Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions |
| title_full | Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions |
| title_fullStr | Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions |
| title_full_unstemmed | Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions |
| title_short | Effect of Low-Frequency Vibration on Muscle Response under Different Neurointact Conditions |
| title_sort | effect of low frequency vibration on muscle response under different neurointact conditions |
| url | http://dx.doi.org/10.1155/2019/1971045 |
| work_keys_str_mv | AT chaofeizhang effectoflowfrequencyvibrationonmuscleresponseunderdifferentneurointactconditions AT wenjunwang effectoflowfrequencyvibrationonmuscleresponseunderdifferentneurointactconditions AT dennisanderson effectoflowfrequencyvibrationonmuscleresponseunderdifferentneurointactconditions AT sishuguan effectoflowfrequencyvibrationonmuscleresponseunderdifferentneurointactconditions AT guofali effectoflowfrequencyvibrationonmuscleresponseunderdifferentneurointactconditions AT hongyixiang effectoflowfrequencyvibrationonmuscleresponseunderdifferentneurointactconditions AT huizhao effectoflowfrequencyvibrationonmuscleresponseunderdifferentneurointactconditions AT bocheng effectoflowfrequencyvibrationonmuscleresponseunderdifferentneurointactconditions |