Oblique abdominal muscle activity in response to external perturbations when pushing a cart

Lee, Yun-Ju; Hoozemans, M.J.M.; Dieën, Jaap H. van

doi:10.1016/j.jbiomech.2010.01.022

Cited by 17 publications

(16 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Electrocardiography (ECG) contamination was identified by means of independent component analysis and removed from the signals (Lee et al 2010). Subsequently, EMG signals were high-pass filtered at 20 Hz and band-stop filtered at 50 Hz and, finally, full-wave rectified and low-pass filtered at 2 Hz (2nd order Butterworth).…”

Section: Data Acquisitionmentioning

confidence: 99%

Handle height and expectation of cart movement affect the control of trunk motion at movement onset in cart pushing

Lee¹,

Hoozemans²,

Dieën³

2011

Ergonomics

Self Cite

View full text Add to dashboard Cite

Section: Data Acquisitionmentioning

confidence: 99%

Handle height and expectation of cart movement affect the control of trunk motion at movement onset in cart pushing

Lee¹,

Hoozemans²,

Dieën³

2011

Ergonomics

Self Cite

View full text Add to dashboard Cite

“…On the other hand, low levels of coactivation between agonists and antagonists can yield substantial stiffness of the trunk [25]. Additionally, the asymmetric hand forces for altering direction of the cart caused substantial twisting moments, which were much higher than those caused by asymmetric perturbations applied in the previous study [11]. In the unexpected sharp turn, the similar baseline activity for straight pushing indicates that the auditory cue for making a turn was indeed unexpected.…”

Section: Discussionmentioning

confidence: 68%

“…The reaction forces caused a clockwise-directed twisting moment on the trunk, which apparently was the direct mechanical cause of the twisting motion. Increased baseline activity might thus be aimed at controlling this motion by increasing trunk stiffness around the longitudinal axis by cocontraction of both trunk rotators [11]. In addition to twisting movements, trunk left lateral bending occurs when turning to the right in normal walking [4].…”

Section: Discussionmentioning

confidence: 99%

“…EMG signals were bandpass filtered (10-400 Hz), amplified (20 times, Porti-17 TM , TMS, Enschede, The Netherlands; input impedance >10 12 V, common mode rejection ratio >90 dB) and stored on disk (sample rate 1000 samples/s; 22 bits). ECG contamination was identified by means of independent component analysis and removed from the signals [11]. Subsequently, EMG signals were high-pass filtered at 20 Hz and bandstop filtered at 50 Hz and finally full-wave rectified and low-pass filtered at 2 Hz (2nd order Butterworth).…”

Section: Data Acquisition and Analysismentioning

confidence: 99%

“…Pushing tasks frequently entail handling objects with a high inertia and unpredictable mechanical interactions with this object and the environment. At the same time, low trunk loading and consequently low trunk muscle activity and trunk stiffness may render control over trunk posture and movement problematic [8][9][10][11]. Trunk control in pushing while turning has to our knowledge not been studied previously.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Trunk muscle control in response to (un)expected turns in cart pushing

Lee¹,

Hoozemans²,

Dieën³

2012

Gait & Posture

Self Cite

View full text Add to dashboard Cite

Three components of postural control associated with pushing in symmetrical and asymmetrical stance

Lee

Aruin

2013

Exp Brain Res

View full text Add to dashboard Cite

A number of occupational and leisure activities that involve pushing are performed in symmetrical or asymmetrical stance. The goal of this study was to investigate early postural adjustments (EPAs), anticipatory postural adjustments (APAs), and compensatory postural adjustments (CPAs) during pushing performed while standing. Ten healthy volunteers stood in symmetrical stance (with feet parallel) or in asymmetrical stance (staggered stance with one foot forward) and were instructed to use both hands to push forward the handle of a pendulum attached to the ceiling. Bilateral EMG activity of the trunk and leg muscles and the center of pressure (COP) displacements in the anterior-posterior (AP) and medial-lateral (ML) directions were recorded and analyzed during the EPAs, APAs, and CPAs. The EMG activity and the COP displacement were different between the symmetrical and asymmetrical stance conditions. The COP displacements in the ML direction were significantly larger in staggered stance than in symmetrical stance. In staggered stance, the EPAs and APAs in the thigh muscles of the backward leg were significantly larger, and the CPAs were smaller than in the forward leg. There was no difference in the EMG activity of the trunk muscles between the stance conditions. The study outcome confirmed the existence of the three components of postural control (EPAs, APAs, and CPAs) in pushing. Moreover, standing asymmetrically was associated with asymmetrical patterns of EMG activity in the lower extremities reflecting the stance-related postural control during pushing. The study outcome provides a basis for studying postural control during other daily activities involving pushing.

show abstract

Oblique abdominal muscle activity in response to external perturbations when pushing a cart

Cited by 17 publications

References 31 publications

Handle height and expectation of cart movement affect the control of trunk motion at movement onset in cart pushing

Handle height and expectation of cart movement affect the control of trunk motion at movement onset in cart pushing

Trunk muscle control in response to (un)expected turns in cart pushing

Three components of postural control associated with pushing in symmetrical and asymmetrical stance

Contact Info

Product

Resources

About