scholarly journals Neural Adjustment in the Activation of the Lower Leg Muscles through Daily Physical Exercises in Community-Based Elderly Persons

2007 ◽  
Vol 211 (2) ◽  
pp. 141-149 ◽  
Author(s):  
Hiroshi Maejima ◽  
Azusa Murase ◽  
Hitoshi Sunahori ◽  
Yuji Kanetada ◽  
Takuya Otani ◽  
...  
Keyword(s):  
Lower Leg ◽  
Elderly Persons ◽  
Community Based ◽  
Leg Muscles ◽  
Physical Exercises

Asymmetrical Neural Adaptation in Lower Leg Muscles as a Consequence of Stereotypical Motor Training

2012 ◽  
Vol 44 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Tetsuya Ogawa ◽  
Noritaka Kawashima ◽  
Shuji Suzuki ◽  
Kimitaka Nakazawa
Keyword(s):  
Lower Leg ◽  
Neural Adaptation ◽  
Motor Training ◽  
Leg Muscles

Long-Lasting Changes in Muscle Twitch Force During Simulated Work While Standing or Walking

2016 ◽  
Vol 58 (8) ◽  
pp. 1117-1127 ◽  
Author(s):  
Maria-Gabriela Garcia ◽  
Rudolf Wall ◽  
Benjamin Steinhilber ◽  
Thomas Läubli ◽  
Bernard J. Martin
Keyword(s):  
Muscle Function ◽  
Signal Amplitude ◽  
Lower Leg ◽  
Muscle Twitch ◽  
Prolonged Standing ◽  
Twitch Force ◽  
Slow Pace ◽  
Leg Muscles ◽  
Ergonomic Interventions ◽  
Hard Floor

Objective: The aim of this study was to evaluate the long-lasting effects of prolonged standing work on a hard floor or floor mat and slow-pace walking on muscle twitch force (MTF) elicited by electrical stimulation. Background: Prolonged standing work may alter lower-leg muscle function, which can be quantified by changes in the MTF amplitude and duration related to muscle fatigue. Ergonomic interventions have been proposed to mitigate fatigue and discomfort; however, their influences remain controversial. Method: Ten men and eight women simulated standing work in 320-min experiments with three conditions: standing on a hard floor or an antifatigue mat and walking on a treadmill, each including three seated rest breaks. MTF in the gastrocnemius-soleus muscles was evaluated through changes in signal amplitude and duration. Results: The significant decrease of MTF amplitude and an increase of duration after standing work on a hard floor and on a mat persisted beyond 1 hr postwork. During walking, significant MTF metrics changes appeared 30 min postwork. MTF amplitude decrease was not significant after the first 110 min in any of the conditions; however, MTF duration was significantly higher than baseline in the standing conditions. Conclusion: Similar long-lasting weakening of MTF was induced by standing on a hard floor and on an antifatigue mat. However, walking partially attenuated this phenomenon. Application: Mostly static standing is likely to contribute to alterations of MTF in lower-leg muscles and potentially to musculoskeletal disorders regardless of the flooring characteristics. Occupational activities including slow-pace walking may reduce such deterioration in muscle function.

The Relationship Between Dolphin Kick Movement And Underwater EMG Of Lower Leg Muscles In Competitive Swimmers

2016 ◽  
Vol 48 ◽  
pp. 441
Author(s):  
Tadashi Wada ◽  
Noriyuki Yamamoto ◽  
Yoshimitsu Shimoyama ◽  
Yukinoti Shintaku ◽  
Hirofumi Jigami ◽  
...  
Keyword(s):  
Lower Leg ◽  
Leg Muscles ◽  
Dolphin Kick ◽  
The Relationship ◽  
Competitive Swimmers

Estimation of instantaneous moment arms of lower-leg muscles

1990 ◽  
Vol 23 (12) ◽  
pp. 1247-1259 ◽  
Author(s):  
C.W. Spoor ◽  
J.L. van Leeuwen ◽  
C.G.M. Meskers ◽  
A.F. Titulaer ◽  
A. Huson
Keyword(s):  
Lower Leg ◽  
Moment Arms ◽  
Leg Muscles

The pathology of the lower leg muscles in pure forefoot pes cavus

1995 ◽  
Vol 89 (6) ◽  
pp. 552-559
Author(s):  
T. R. Helliwell ◽  
M. Tynan ◽  
M. Hayward ◽  
L. Klenerman ◽  
G. Whitehouse ◽  
...  
Keyword(s):  
Lower Leg ◽  
Pes Cavus ◽  
Leg Muscles

Structural Response of Lower Leg Muscles in Compression: A Low Impact Energy Study Employing Volunteers, Cadavers and the Hybrid III

2002 ◽  
Author(s):  
Trilok S. Dhaliwal ◽  
Philippe Beillas ◽  
Clifford C. Chou ◽  
Priya Prasad ◽  
King H. Yang ◽  
...  
Keyword(s):  
Impact Energy ◽  
Structural Response ◽  
Lower Leg ◽  
Leg Muscles ◽  
Hybrid Iii

Brain Regulation of Muscle Tone in Healthy and Functionally Unstable Ankles

2013 ◽  
Vol 22 (3) ◽  
pp. 202-211 ◽  
Author(s):  
Alan R. Needle ◽  
Jacqueline A. Palmer ◽  
Trisha M. Kesar ◽  
Stuart A. Binder-Macleod ◽  
C. Buz Swanik
Keyword(s):  
Cortical Excitability ◽  
Ankle Instability ◽  
Silent Period ◽  
Lower Leg ◽  
Joint Laxity ◽  
Ligamentous Injury ◽  
Functional Ankle Instability ◽  
Cortical Silent Period ◽  
Leg Muscles ◽  
History Of

Context:Current research into the etiology of joint instability has yielded inconsistent results, limiting our understanding of how to prevent and treat ligamentous injury effectively. Recently, cortical reorganization was demonstrated in patients with ligamentous injury; however, these neural changes have not been assessed relative to joint laxity.Objective:The purpose of the current study was to determine if changes in cortical excitability and inhibition occur in subjects with functional ankle instability, as well as to investigate the relationship between these measures and joint laxity.Design:Posttest only with control group.Setting:University laboratory.Subjects:12 subjects with no history of ankle sprain (CON) and 12 subjects with a history of unilateral functional ankle instability (UNS).Interventions:Subjects were tested for joint laxity using an instrumented ankle arthrometer. Cortical excitability and inhibition were assessed using transcranial magnetic stimulation (TMS) to obtain motor-evoked potentials and the cortical silent period from the lower leg muscles.Main Outcome Measures:Joint laxity was quantified as peak anterior displacement and inversion rotation. Active motor threshold, slope, and intensity at 50% of peak slope of TMS-derived recruitment curves were used to quantify cortical excitability from lower leg muscles, while the cortical silent period from the peroneus longus was used to represent intracortical inhibition.Results:No significant differences were observed between groups for laxity or cortical measures. CON demonstrated a significant relationship between laxity and tibialis anterior excitability, as well as laxity and silent period, while UNS ankles demonstrated significant relationships between peroneal and soleus excitability and laxity measures.Conclusion:Our results support relationships between laxity and measures of excitability and inhibition that differ between healthy and unstable subjects. Future research should further investigate the mechanisms behind these findings and consider cortical influences when investigating altered joint laxity.

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