Effects of postural disturbances with fatigued triceps surae muscles or with 20% additional body weight

Ledin, Torbjörn; Fransson, Per-Anders; Magnusson, Måns

doi:10.1016/s0966-6362(03)00061-4

Cited by 86 publications

(103 citation statements)

References 37 publications

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“…Also, Vuillerme et al showed that MF of a degree similar to that used in this study in both gastrocnemius muscles increased the difference of foot pressure variance between the front and the rear, and the right and the left by almost 100 % 19) . Ledin et al reported that MF in both gastrocnemius muscles similarly resulted in an increase in postural sway compared to the control group 7) . The reason for MF causing postural sway can be attributed to a decline in proprioception in the ankle joints and changes in motor function 20) .…”

Section: Gribbles Et Al Reported Mf In the Lower Limbs Increasedmentioning

confidence: 96%

“…Before the actual measurement took place, participants were given five attempts to familiarize themselves with the task. After the practice session, they rested for 10 minutes, and those who used lower limbs or torso to maintain balance in the unipedalstance were asked to re-do the task 7) .…”

Section: Methodsmentioning

confidence: 99%

“…The somatosensory sense is the most vital sense for maintaining balance among the three types of afferent sensory input, and proprioception as its submodality greatly contributes to maintaining balance and postural control by controlling joint-position sense and limb movement sensation 6) . Furthermore, adequate recruitment of muscle strength, a prerequisite for postural control, is required to maintain a desirable action or activity 7) . MF causes changes in movement and postural control by altering the efficiency of muscle strength and proprioception information, and MF occurs in the aged who experience frequent falls as well as patients with various diseases 8,9) .…”

Section: Introductionmentioning

confidence: 99%

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Effects of Transcutaneous Electrical Nerve Stimulation (TENS) on Changes in Postural Balance and Muscle Contraction following Muscle Fatigue

Cho

Lee

et al. 2011

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to investigate the effects of transcutaneous electrical stimulation (TENS) applied to fatigued muscles on postural imbalance and decline in muscle strength following fatigue of the gastrocnemius.[Subjects] Eighteen subjects with muscle fatigue were allocated to either a sensory threshold group or a 2~3 times sensory threshold group and the study followed a randomized single-blind cross-over design.[Methods] Muscle fatigue of the gastrocnemius was induced by repeated exercise. After inducing fatigue, TENS was applied to the fatigued muscle. The postural sway length (PSL), postural sway velocity (PSV) and maximal voluntary contraction (MVC) were measured before and after the induction of fatigue, and during the application of TENS to the fatigued muscles.[Results] Muscle fatigue increased postural imbalance as expressed by length and velocity of body sway and decreased muscle strength, while TENS improved the postural imbalance and partially reversed the muscle strength decline induced by muscle fatigue.[Conclusion] Muscle fatigue is an important factor in postural balance control and muscle voluntary contraction, and TENS can be effective at relieving muscle fatigue.

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Section: Gribbles Et Al Reported Mf In the Lower Limbs Increasedmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Transcutaneous Electrical Nerve Stimulation (TENS) on Changes in Postural Balance and Muscle Contraction following Muscle Fatigue

Cho

Lee

et al. 2011

J Phys Ther Sci

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“…[1][2][3][4]). A study investigating the relationship between ankle proprioceptive acuity and balance ability during quiet standing following exercise-induced plantar-flexor muscles fatigue is planned to address this issue.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4]). These observations have been suggested to stem from a decreased ankle proprioception and an inability to produce or sustain required force output with the fatigued plantar-flexor muscles.…”

Section: Introductionmentioning

confidence: 99%

Muscle fatigue degrades force sense at the ankle joint

Vuillerme

Boisgontier

2008

Gait & Posture

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To investigate the effects of muscle fatigue on force sense at the ankle joint, ten young healthy adults were asked to perform an isometric contra-lateral force ankle-matching task in two experimental conditions of (1) No-fatigue and (2) Fatigue of the plantar-flexor muscles.Measures of the overall accuracy and the variability of the force matching performances were determined using the absolute error and the variable error, respectively. Results showed less accurate and less consistent force matching performances in the Fatigue than No fatigue condition, as indicated by decreased absolute and variable errors, respectively. The present findings evidence that muscle fatigue degrades force sense at the ankle joint.

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Localization of the plane of regard in space

Poljac¹,

Berg²

2005

Exp Brain Res

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When we fixate an object in space, the rotation centers of the eyes, together with the object, define a plane of regard. People perceive the elevation of objects relative to this plane accurately, irrespective of eye or head orientation (Poljac et al. (2004) Vision Res, in press). Yet, to create a correct representation of objects in space, the orientation of the plane of regard in space is required. Subjects pointed along an eccentric vertical line on a touch screen to the location where their plane of regard intersected the touch screen positioned on their right. The distance of the vertical line to the subject's eyes varied from 10 to 40 cm. Subjects were sitting upright and fixating one of the nine randomly presented directions ranging from 20 degrees left and down to 20 degrees right and up relative to their straight ahead. The eccentricity of fixations relative to the pointing location varied by up to 40 degrees . Subjects underestimated the elevation of their plane of regard (on average by 3.69 cm, SD=1.44 cm), regardless of the fixation direction or pointing distance. However, when the targets were shown on a display mounted in a table, to provide support of the subject's hand throughout the trial, subjects pointed accurately (average error 0.3 cm, SD=0.8 cm). In addition, head tilt 20 degrees to the left or right did not cause any change in accuracy. The bias observed in the first task could be caused by maintained tonus in arm muscles when the arm is raised, that might interfere with the transformation from visual to motor signals needed to perform the pointing movement. We conclude that the plane of regard is correctly localized in space. This may be a good starting point for representing objects in head-centric coordinates.

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Effects of postural disturbances with fatigued triceps surae muscles or with 20% additional body weight

Cited by 86 publications

References 37 publications

Effects of Transcutaneous Electrical Nerve Stimulation (TENS) on Changes in Postural Balance and Muscle Contraction following Muscle Fatigue

Effects of Transcutaneous Electrical Nerve Stimulation (TENS) on Changes in Postural Balance and Muscle Contraction following Muscle Fatigue

Muscle fatigue degrades force sense at the ankle joint

Localization of the plane of regard in space

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