Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/98871
PIRA download icon_1.1View/Download Full Text
Title: How does lower limb respond to unexpected balance perturbations ? New insights from synchronized human kinetics, kinematics, muscle electromyography (EMG) and mechanomyography (MMG) data
Authors: Zhu, RTL 
Lyu, PZ 
Li, S 
Tong, CY 
Ling, YT 
Ma, CZH 
Issue Date: Jun-2022
Source: Biosensors, June 2022, v. 12, no. 6, 430
Abstract: Making rapid and proper compensatory postural adjustments is vital to prevent falls and fall-related injuries. This study aimed to investigate how, especially how rapidly, the multiple lower-limb muscles and joints would respond to the unexpected standing balance perturbations. Unexpected waist-pull perturbations with small, medium and large magnitudes were delivered to twelve healthy young adults from the anterior, posterior, medial and lateral directions. Electromy-ographical (EMG) and mechanomyographical (MMG) responses of eight dominant-leg muscles (i.e., hip abductor/adductors, hip flexor/extensor, knee flexor/extensor, and ankle dorsi-flexor/plantarflexors) together with the lower-limb joint angle, moment, and power data were rec-orded. The onset latencies, time to peak, peak values, and/or rate of change of these signals were analyzed. Statistical analysis revealed that: (1) agonist muscles resisting the delivered perturbation had faster activation than the antagonist muscles; (2) ankle muscles showed the largest rate of activation among eight muscles following both anteroposterior and mediolateral perturbations; (3) lower-limb joint moments that complied with the perturbation had faster increase; and (4) larger perturbation magnitude tended to evoke a faster response in muscle activities, but not necessarily in joint kinetics/kinematics. These findings provided insights regarding the underlying mechanism and lower-limb muscle activities to maintain reactive standing balance in healthy young adults.
Keywords: Balance control
Balance perturbation
Compensatory postural adjustment (CPA)
Electromyography (EMG)
Mechanomyography (MMG)
Onset latency
Reactive balance response
Skeletal muscle
Time to peak
Waist-pulling perturbation
Publisher: MDPI AG
Journal: Biosensors 
EISSN: 2079-6374
DOI: 10.3390/bios12060430
Rights: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
The following publication Zhu RT-L, Lyu P-Z, Li S, Tong CY, Ling YT, Ma CZ-H. How Does Lower Limb Respond to Unexpected Balance Perturbations? New Insights from Synchronized Human Kinetics, Kinematics, Muscle Electromyography (EMG) and Mechanomyography (MMG) Data. Biosensors. 2022; 12(6):430 is available at https://doi.org/10.3390/bios12060430.
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
biosensors-12-00430-v2.pdf8.75 MBAdobe PDFView/Open
Open Access Information
Status open access
File Version Version of Record
Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page views

34
Citations as of Mar 24, 2024

Downloads

12
Citations as of Mar 24, 2024

SCOPUSTM   
Citations

6
Citations as of Mar 28, 2024

WEB OF SCIENCETM
Citations

6
Citations as of Mar 28, 2024

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.