Full gait cycle analysis of lower limb and trunk kinematics and muscle activations during walking in participants with and without ankle instability

AbstractGravity plays a crucial role in shaping patterned locomotor output to maintain dynamic stability during locomotion. The present study aimed to clarify the gravity-dependent regulation of modules that organize multiple muscle activities during walking in humans. Participants walked on a treadmill at seven speeds (1–6 km h−1 and a subject- and gravity-specific speed determined by the Froude number (Fr) corresponding to 0.25) while their body weight was partially supported by a lift to simulate walking with five levels of gravity conditions from 0.07 to 1 g. Modules, i.e., muscle-weighting vectors (spatial modules) and phase-dependent activation coefficients (temporal modules), were extracted from 12 lower-limb electromyographic (EMG) activities in each gravity (Fr ~ 0.25) using nonnegative matrix factorization. Additionally, a tensor decomposition model was fit to the EMG data to quantify variables depending on the gravity conditions and walking speed with prescribed spatial and temporal modules. The results demonstrated that muscle activity could be explained by four modules from 1 to 0.16 g and three modules at 0.07 g, and the modules were shared for both spatial and temporal components among the gravity conditions. The task-dependent variables of the modules acting on the supporting phase linearly decreased with decreasing gravity, whereas that of the module contributing to activation prior to foot contact showed nonlinear U-shaped modulation. Moreover, the profiles of the gravity-dependent modulation changed as a function of walking speed. In conclusion, reduced gravity walking was achieved by regulating the contribution of prescribed spatial and temporal coordination in muscle activities.

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Effects of fatigue on lower limb, pelvis and trunk kinematics and muscle activation: Gender differences

Journal of Electromyography and Kinesiology ◽

10.1016/j.jelekin.2016.11.001 ◽

2017 ◽

Vol 32 ◽

pp. 9-14 ◽

Cited By ~ 18

Author(s):

Giovanna Camparis Lessi ◽

Ana Flávia dos Santos ◽

Luis Fylipe Batista ◽

Gabriela Clemente de Oliveira ◽

Fábio Viadanna Serrão

Keyword(s):

Gender Differences ◽

Lower Limb ◽

Muscle Activation ◽

Trunk Kinematics

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Lower Limb Prosthesis Gait Cycle Prediction Analysis Using Gyroscope and Load Cell

10.1109/icrai54018.2021.9651371 ◽

2021 ◽

Author(s):

Syed Sohaib Ali Shah ◽

Syed Irfan Shah ◽

Muhammad Adnan Khalil ◽

Umar S. Khan ◽

Mohsin I. Tiwana

Keyword(s):

Lower Limb ◽

Gait Cycle ◽

Load Cell ◽

Prediction Analysis ◽

Lower Limb Prosthesis ◽

Limb Prosthesis

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Effect of Mechanical Stimulation Applied to the Lower-Limb Musculature on Stability and Function of Stair Climbing

Applied Sciences ◽

10.3390/app10030799 ◽

2020 ◽

Vol 10 (3) ◽

pp. 799

Author(s):

Seunghun Ko ◽

Kiyoung Kwak ◽

Huigyun Kim ◽

Dongwook Kim

Keyword(s):

Lower Limb ◽

Mechanical Vibration ◽

Stair Climbing ◽

Dynamic Movement ◽

Sensorimotor Area ◽

Co Activation ◽

Muscle Tendon Vibration ◽

Muscle Activations ◽

The Stability ◽

And Function

Mechanical muscle-tendon vibration affects musculature and the nervous system. As the vibrations used in previous studies were varied, consistently determining the effect of mechanical vibration was challenging. Additionally, only a few studies have applied vibrations to dynamic motion. This study investigated whether the vibration based on the sensorimotor response could affect the stability and function of stair climbing. Electroencephalogram (EEG) signals were recorded from the sensorimotor area, and mu rhythms, dependent on the vibration frequencies, were analyzed. Based on the analysis, the vibratory stimulus conditions were set and applied to the Achilles tendon of the lower limb during stair climbing. Simultaneously, electromyogram (EMG) signals from the gastrocnemius lateralis (GL), gastrocnemius medialis (GM), soleus (SOL), and tibialis anterior (TA) were recorded. Activations and co-activations of the shank muscles were analyzed according to the phases of stair climbing. When vibration was applied, the TA activation decreased in the pull-up (PU) phase, and calf muscle activations increased during the forward continuous (FCN) phase. These changes and their degrees differ significantly between stimulus conditions (p < 0.05). Co-activation changes, which differed significantly with conditions (p < 0.05), appeared mostly in the PU. These results imply that the vibration affects stability and function of stair climbing, suggesting that the vibration characteristics should be considered when they are applied to dynamic movement.

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Linear Logistic Regression for Estimation of Lower Limb Muscle Activations

IEEE Transactions on Neural Systems and Rehabilitation Engineering ◽

10.1109/tnsre.2019.2898207 ◽

2019 ◽

Vol 27 (3) ◽

pp. 523-532 ◽

Cited By ~ 2

Author(s):

Masashi Sekiya ◽

Sho Sakaino ◽

Tsuji Toshiaki

Keyword(s):

Logistic Regression ◽

Lower Limb ◽

Lower Limb Muscle ◽

Limb Muscle ◽

Muscle Activations

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Control of Ankle Angles During Gait Cycle for Lower Limb Prosthesis

2019 International Conference on Robotics and Automation in Industry (ICRAI) ◽

10.1109/icrai47710.2019.8967363 ◽

2019 ◽

Author(s):

Muhammad Adnan Khalil ◽

Muneeb Masood Raja ◽

Umar S. Khan ◽

Abdul Hanan ◽

Mohsin I. Tiwana ◽

...

Keyword(s):

Lower Limb ◽

Gait Cycle ◽

Lower Limb Prosthesis ◽

Limb Prosthesis

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Dysfunctional muscle activities and co-contraction in the lower-limb of lumbar disc herniation patients during walking

Scientific Reports ◽

10.1038/s41598-020-77150-7 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Wei Wang ◽

Hui Wei ◽

Runxiu Shi ◽

Leitong Lin ◽

Lechi Zhang ◽

...

Keyword(s):

Lumbar Disc Herniation ◽

Disc Herniation ◽

Lower Limb ◽

Gait Cycle ◽

Lumbar Disc ◽

Lower Limbs ◽

Heel Strike ◽

Control Group ◽

Double Support ◽

Support Phase

AbstractThis study aimed to investigate lower-limb muscle activities in gait phases and co-contraction of one gait cycle in patients with lumbar disc herniation (LDH). This study enrolled 17 LDH patients and 17 sex- and age-matched healthy individuals. Bilateral muscle activities of the rectus femoris (RF), biceps femoris long head (BL), tibialis anterior (TA), and lateral gastrocnemius (LG) during walking were recorded. The gait cycle was divided into four phases by the heel strike and top off according to the kinematics tracks. Root mean square (RMS), mean frequency (MF), and co-contraction of surface electromyography signals were calculated. The LDH patients showed enhanced BL RMS during the single support phase (SS), second double support phase, and swing phase (SW) as well as decreased MF of RF during SS and of TA and LG during SW (p < 0.05). The co-contraction of the TA-LG was increased in LDH patients than in the control group (p < 0.05). Positive correlations were observed between TA-LG co-contraction (affected side, r = 0.557, p = 0.020; contralateral side, r = 0.627, p = 0.007) and the Oswestry disability index scores in LDH patients. LDH patients have increased BL firing rate and insufficient motor unit recruitment in specific phases in the lower limbs during walking. Dysfunction in LDH patients was associated with immoderate intermuscular co-contraction of the TA-LG during walking.

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Kinetic Differences in a Subject With Two Different Prosthetic Knees While Performing Sitting and Standing Movements

ASME 2008 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2008-193045 ◽

2008 ◽

Cited By ~ 1

Author(s):

Derek J. Lura ◽

M. Jason Highsmith ◽

Stephanie L. Carey ◽

Rajiv V. Dubey

Keyword(s):

Control Subject ◽

Lower Limb ◽

Gait Cycle ◽

Knee Prosthesis ◽

Large Population ◽

Human Locomotion ◽

Ongoing Study ◽

Consumer Markets ◽

The Difference ◽

Prosthetic Knees

Advanced prostheses are currently being sold in consumer markets. The development of these advanced prostheses is largely a result of a better understanding of the biomechanics of human locomotion [1]. Powered and microprocessor controlled prostheses are offering better performance in a variety of movements and in the gait cycle. However the focus in lower limb prosthetics has been largely on locomotion (e.g. walking, stair gait and running). This study focuses on the sit and stand cycles of an individual with an Otto Bock C-leg and an Ossur Power Knee prosthesis, comparing his ability to utilize each prosthesis and comparing his cycle to that of a healthy (non-amputee) control subject. This study is part of a larger ongoing study of the sit and stand cycles seen in a large population of unilateral transfemoral prosthetic users of various kinds. The purpose of this study is to compare the difference in method of standing, and assistance provided by the prosthesis. With the knowledge gained from this study we hope to better understand the biomechanics of the sit and stand cycles, leading to better prostheses in the future.

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