Distributed moment histogram: A neurophysiology based method of agonist and antagonist trunk muscle activity prediction

Pelvic drop is caused by decreased hip abductor muscle activity and is associated with lower-extremity injury. Hip abductor strengthening exercises are well established; however, no standard method exists to increase hip abductor activity during functional activities. The purpose of this research was to study the effects of walking with a unilateral weight. A total of 26 healthy adults walked on an instrumented treadmill with and without handheld weight (15%–20% body weight). Muscle activity, kinematic, and kinetic data were collected using surface electromyography, motion capture, and force plates, respectively. Average hip and trunk muscle activity, hip, pelvic, and trunk angles, and peak internal hip moments during stance were compared for each side (contralateral/ipsilateral to the weight) between conditions (unweighted/weighted) using a generalized linear model with generalized estimating equation correction. Interactions between condition and side were observed for muscle activity, frontal plane pelvic and trunk angles, and frontal plane hip moments (P ≤ .003). Compared with the unweighted condition, the weighted condition had higher hip abductor activity contralateral to the weight (P < .001), while no change was found ipsilateral to the weight (P ≥ .790). Similar changes were found for kinematic and kinetic variables. Walking with a unilateral weight may be a therapeutic option to increase functional hip abductor activity.

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Effects of pushing height on trunk posture and trunk muscle activity when a cart suddenly starts or stops moving

Work ◽

10.3233/wor-2012-0581-3189 ◽

2012 ◽

Vol 41 ◽

pp. 3189-3195

Author(s):

Yun-Ju Lee ◽

Marco J.M. Hoozemans ◽

Jaap H. van Dieën

Keyword(s):

Muscle Activity ◽

Trunk Muscle ◽

Trunk Posture

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Changes in lumbopelvic motion and trunk muscle activity during 2000 m rowing ergometer trial

International Journal of Sport and Health Science ◽

10.5432/ijshs.202048 ◽

2021 ◽

Author(s):

Chie Sekine ◽

Naoto Matsunaga ◽

Koji Kaneoka

Keyword(s):

Muscle Activity ◽

Trunk Muscle ◽

Rowing Ergometer

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Effects of NMES and Horseback Riding Using a Robotic Device on the Trunk Muscle Activity and Gross Motor Function in Children with Spastic Diplegia

The Journal of Korean Physical Therapy ◽

10.18857/jkpt.2018.30.4.123 ◽

2018 ◽

Vol 30 (4) ◽

pp. 123-128

Author(s):

Shin-Jun Park ◽

Pong-Sub Youn

Keyword(s):

Motor Function ◽

Muscle Activity ◽

Trunk Muscle ◽

Spastic Diplegia ◽

Horseback Riding ◽

Robotic Device ◽

Gross Motor ◽

Gross Motor Function

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Alteration in HDEMG Spatial Parameters of Trunk Muscle Due to Handle Design during Pushing

Sensors ◽

10.3390/s21196646 ◽

2021 ◽

Vol 21 (19) ◽

pp. 6646

Author(s):

Jacqueline Toner ◽

Jeremy Rickards ◽

Kenneth Seaman ◽

Usha Kuruganti

Keyword(s):

Muscle Activity ◽

Muscle Activation ◽

Trunk Muscle ◽

Erector Spinae ◽

Low Back ◽

Horizontal Orientation ◽

Low Back Injuries ◽

Spatial Parameters ◽

Left And Right ◽

Pushing And Pulling

Previous research identifies that pushing and pulling is responsible for approximately 9–18% of all low back injuries. Additionally, the handle design of a cart being pushed can dramatically alter a worker’s capacity to push (≅9.5%). Surprisingly little research has examined muscle activation of the low back and its role in muscle function. Therefore, the purpose of this study was to examine the effects of handle design combination of pushing a platform truck cart on trunk muscle activity. Twenty participants (10 males and 10 females, mean age = 24.3 ± 4.3 years) pushed 475 lbs using six different handle combinations involving handle orientation (vertical/horizontal/semi-pronated) and handle height (hip/shoulder). Multichannel high-density EMG (HDsEMG) was recorded for left and right rectus abdominis, erector spinae, and external obliques. Pushing at hip height with a horizontal handle orientation design (HH) resulted in significantly less (p < 0.05) muscle activity compared to the majority of other handle designs, as well as a significantly higher entropy than the shoulder handle height involving either the semi-pronated (p = 0.023) or vertical handle orientation (p = 0.028). The current research suggests that the combination of a hip height and horizontal orientation handle design may require increased muscle demand of the trunk and alter the overall muscle heterogeneity and pattern of the muscle activity.

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Analysis of trunk muscle EMG during rotational motion

10.32920/ryerson.14668239.v1 ◽

2021 ◽

Author(s):

Nika Zolfaghari

Keyword(s):

Rotational Motion ◽

Muscle Activity ◽

Trunk Muscle ◽

Trunk Muscles ◽

Wheelchair Users ◽

Area Of Interest ◽

Shoulder Muscles ◽

Seated Balance ◽

The Subject ◽

Rotational Direction

The study of seated balance, specifically for the application of wheelchair users, has been an area of interest for quite some time. Unfortunately, most of the available studies to date have focused on upper limb and shoulder muscles, and little has been done analyzing the activity of trunk muscles (abdominal and back). For the purpose of this study, motorized rotational motion in the forward and backward directions at ±45 degrees was simulated, and the corresponding trunk muscle activity of nine healthy subjects was recorded by surface electromyography (EMG) for eight muscles, including an analysis on the effect of holding on to a harness for support, coupled with the presence of a visual input. The collected raw data was filtered, and the produced results illustrated that the muscle activity was greatest in the forward rotational direction, when the subject was holding on to a harness for support, with visuals present.

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