scholarly journals Investigating Tibialis Anterior Muscle Activity Levels in Patients With Genu Varum During Single-Leg Jump-Landing Task

2018 ◽  
pp. 205-214
Author(s):  
Faraj Fatahi ◽  
Yosef Mongashti Joni ◽  
Alireza Najafi ◽  
Eskandar Hossein Pour
Keyword(s):  
Muscle Activity ◽  
Tibialis Anterior ◽  
Tibialis Anterior Muscle ◽  
Genu Varum ◽  
Activity Levels ◽  
Jump Landing

Effect of a Forefoot Off-loading Postoperative Shoe on Muscle Activity, Posture, and Static Balance

2013 ◽  
Vol 103 (1) ◽  
pp. 36-42 ◽  
Author(s):  
Joanne S. Paton ◽  
Katherine Thomason ◽  
Karl Trimble ◽  
James E. Metcalfe ◽  
Jonathan Marsden
Keyword(s):  
Muscle Activity ◽  
Tibialis Anterior ◽  
Peak Pressure ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Ankle Instability ◽  
Tibialis Anterior Muscle ◽  
Contralateral Side ◽  
Support Surface ◽  
Ankle Muscle

Background: We investigated whether a forefoot off-loading postoperative shoe (FOPS) alters standing posture, ankle muscle activity, and static postural sway and whether any effects are altered by wearing a shoe raise on the contralateral side. Methods: Posture, ankle muscle activity, and postural sway were compared in 14 healthy participants wearing either a FOPS or a control shoe with or without a contralateral shoe raise. Participants were tested under different sensory and support surface conditions. Additionally, reductions in peak pressure under the forefoot while walking were assessed with and without a contralateral shoe raise to determine whether the FOPS continued to achieve its primary off-loading function. Results: Compared with the control condition, wearing a FOPS moved the center of pressure posteriorly, increased tibialis anterior muscle activity, and reduced ankle plantarflexor activity. These changes decreased when a contralateral shoe raise was added. No difference in postural sway was found between footwear conditions. Forefoot peak pressure was always reduced when wearing the FOPS. Conclusions: The posterior shift in center of pressure toward and behind the ankle joint axis is believed to result in the increase in tibialis anterior muscle activity that now acts as the primary stabilizer around the ankle. Instability may, therefore, increase in patients with weak tibialis anterior muscles (eg, diabetic neuropathy) who need to wear offloading devices for ulcer management. We suggest that the addition of a contralateral shoe raise fitted with a FOPS may potentially be beneficial in maintaining stability while off-loading the forefoot in this patient group. (J Am Podiatr Med Assoc 103(1): 36–42, 2013)

Modulation of tibialis anterior muscle activity changes with upright stance width

2015 ◽  
Vol 25 (1) ◽  
pp. 168-174 ◽  
Author(s):  
Thiago Lemos ◽  
Luís A. Imbiriba ◽  
Claudia D. Vargas ◽  
Taian M. Vieira
Keyword(s):  
Muscle Activity ◽  
Tibialis Anterior ◽  
Tibialis Anterior Muscle ◽  
Upright Stance

The Influence of Tibialis Anterior Muscle Activity on Rearfoot Motion during Walking

1994 ◽  
Vol 15 (2) ◽  
pp. 75-79 ◽  
Author(s):  
Mark W. Cornwall ◽  
Thomas G. Mcpoil
Keyword(s):  
Muscle Activity ◽  
Tibialis Anterior ◽  
Stance Phase ◽  
Tibialis Anterior Muscle ◽  
Two Dimensional ◽  
Muscular System ◽  
Surface Electrodes ◽  
Accurate Picture ◽  
Significant Difference ◽  
Rearfoot Motion

The purpose of this study was to determine whether tibialis anterior muscle activity influences the rate of rearfoot motion during walking. Two-dimensional rearfoot motion was recorded from 23 feet. The feet were assigned to one of two experimental groups. Muscle activity was recorded from the tibialis anterior muscle using surface electrodes. The early pronators (N = 12) reached maximal pronation within the first 20K of the stance phase. The late pronators (N = 11) reached maximal pronation only after 40% of the stance phase. The results of a C-test showed that there was a significant difference (P < .05) in the time to minimal tibialis anterior muscle activity between the two groups. These results indicate that tibialis anterior muscle activity can influence rearfoot motion during the stance phase of walking. A clinician should consider the muscular system when evaluating and designing a treatment program for patients with foot-related problems. The results of this study also indicate that static nonweightbearing evaluations alone may not provide an accurate picture of the foot during walking.

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