scholarly journals Trunk Muscle Activation Patterns Differ Between Those With Low and High Back Extensor Strength During a Controlled Dynamic Task

2020 ◽  
Vol 1 ◽  
Author(s):  
D. Adam Quirk ◽  
Raymond D. Trudel ◽  
Cheryl L. Hubley-Kozey
Keyword(s):  
Muscle Activation ◽  
Trunk Muscle ◽  
Activation Patterns ◽  
Dynamic Task ◽  
Back Extensor Strength ◽  
Muscle Activation Patterns ◽  
Back Extensor

scholarly journals Trunk muscle activation patterns during active hip abduction test during remission from recurrent low back pain: an observational study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Tadanobu Suehiro ◽  
Hiroshi Ishida ◽  
Kenichi Kobara ◽  
Hiroshi Osaka ◽  
Chiharu Kurozumi
Keyword(s):  
Muscle Activation ◽  
Gluteus Medius ◽  
Trunk Muscle ◽  
Erector Spinae ◽  
Transversus Abdominis ◽  
Activation Patterns ◽  
Muscle Activation Patterns ◽  
Hip Abduction ◽  
Recurrent Low Back Pain ◽  
Insight Into

Abstract Background The active hip abduction test (AHAbd) is widely used to evaluate lumbopelvic stability, but the onset of trunk muscle activation during the test in individuals with recurrent low back pain (rLBP) has not been investigated so far. It is important to investigate the pattern of trunk muscle activation during the AHAbd test to provide insight into the interpretation of observation-based assessment results; this may help to create exercise therapy interventions, from a movement control perspective, for people seeking treatment for rLBP. The purpose of this study was to compare the timing of trunk muscle activation between individuals with and without rLBP and to assess potential differences. Methods Seventeen subjects in remission from rLBP and 17 subjects without rLBP were recruited. We performed surface electromyography of the transversus abdominis/internal abdominal oblique, external oblique, erector spinae, and gluteus medius muscles during the AHAbd test on both sides. The onset of trunk muscle activation was calculated relative to the prime mover gluteus medius. The independent-samples t- and Mann-Whitney U tests were used to compare the onset of trunk muscle activation between the two groups. Results The onset of transversus abdominis/internal abdominal oblique activation on the ipsilateral (right AHAbd: −3.0 ± 16.2 vs. 36.3 ± 20.0 msec, left AHAbd: −7.2 ± 18.6 vs. 29.6 ± 44.3 ms) and contralateral sides (right AHAbd: −11.5 ± 13.9 vs. 24.4 ± 32.3 ms, left AHAbd: −10.1 ± 12.5 vs. 23.3 ± 17.2 ms) and erector spinae on the contralateral side (right AHAbd: 76.1 ± 84.9 vs. 183.9 ± 114.6 ms, left AHAbd: 60.7 ± 70.5 vs. 133.9 ± 98.6 ms) occurred significantly later in individuals with rLBP than in individuals without rLBP (p < 0.01). During the left AHAbd test, the ipsilateral erector spinae was also activated significantly later in individuals with rLBP than in individuals without rLBP (71.1 ± 80.1 vs. 163.8 ± 120.1 ms, p < 0.05). No significant difference was observed in the onset of the external oblique activation on the right and left AHAbd tests (p > 0.05). Conclusions Our results suggest that individuals with rLBP possess a trunk muscle activation pattern that is different from that of individuals without rLBP. These findings provide an insight into the underlying muscle activation patterns during the AHAbd test for people with rLBP and may support aggressive early intervention for neuromuscular control.

Immediate changes in trunk muscle activation patterns during a lifting task following an abdominal drawing-in exercise in subjects with recurrent low back pain

2020 ◽  
pp. 1-9
Author(s):  
Tadanobu Suehiro ◽  
Hiroshi Ishida ◽  
Kenichi Kobara ◽  
Hiroshi Osaka ◽  
Chiharu Kurozumi ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Activation ◽  
Trunk Muscle ◽  
Low Back ◽  
Activation Patterns ◽  
Emg Amplitude ◽  
Muscle Activation Patterns ◽  
Recurrent Low Back Pain ◽  
Lifting Task

BACKGROUND: The abdominal drawing-in exercise could help improve delayed transversus abdominis (TrA) activation during limb movement in subjects with recurrent low back pain (rLBP). However, little is known about whether the same effect is observed during lifting tasks in subjects with rLBP. OBJECTIVE: This study aimed to clarify whether a single session of abdominal drawing-in exercise could correct the altered trunk muscle activation patterns during a lifting task in subjects with rLBP. METHODS: Fifteen subjects with rLBP performed lifting tasks before and immediately after three sets of 10 repetitions of isolated TrA voluntary contractions. The time of onset and activation amplitude during the lifting tasks were measured by surface electromyography (EMG) and compared between the trials before and immediately after exercise. RESULTS: During lifting, the onset of internal abdominal oblique/TrA (IO/TrA) and multifidus activation occurred earlier, the EMG amplitude of IO/TrA increased, and the EMG amplitude of erector spinae and multifidus decreased, compared with the pre-exercise data. CONCLUSIONS: These results suggest a possibility that the abdominal drawing-in exercise might be effective in improving the muscle recruitment pattern in people with rLBP.

scholarly journals A study on trunk muscle activation patterns according to tilt angle during whole body tilts

2017 ◽  
Vol 25 ◽  
pp. 73-81 ◽  
Author(s):  
Sun Hye Shin ◽  
Seung Rok Kang ◽  
Tae-Kyu Kwon ◽  
Changho Yu
Keyword(s):  
Tilt Angle ◽  
Muscle Activation ◽  
Trunk Muscle ◽  
Whole Body ◽  
Activation Patterns ◽  
Muscle Activation Patterns

Trunk muscle activation patterns during walking at different speeds

2007 ◽  
Vol 17 (2) ◽  
pp. 245-252 ◽  
Author(s):  
Christoph Anders ◽  
Heiko Wagner ◽  
Christian Puta ◽  
Roland Grassme ◽  
Alexander Petrovitch ◽  
...  
Keyword(s):  
Muscle Activation ◽  
Trunk Muscle ◽  
Activation Patterns ◽  
Muscle Activation Patterns

scholarly journals Trunk Muscle Activation Patterns During Standing Turns in Patients With Stroke: An Electromyographic Analysis

2021 ◽  
Vol 12 ◽  
Author(s):  
I-Hsuan Chen ◽  
Pei-Jung Liang ◽  
Valeria Jia-Yi Chiu ◽  
Shu-Chun Lee
Keyword(s):  
Muscle Activation ◽  
Trunk Muscle ◽  
Erector Spinae ◽  
Trunk Muscles ◽  
Trunk Control ◽  
Activation Patterns ◽  
Muscle Activation Patterns ◽  
Paretic Side ◽  
External Oblique ◽  
Electromyographic Analysis

Recent evidence indicates that turning difficulty may correlate with trunk control; however, surface electromyography has not been used to explore trunk muscle activity during turning after stroke. This study investigated trunk muscle activation patterns during standing turns in healthy controls (HCs) and patients with stroke with turning difficulty (TD) and no TD (NTD). The participants with stroke were divided into two groups according to the 180° turning duration and number of steps to determine the presence of TD. The activation patterns of the bilateral external oblique and erector spinae muscles of all the participants were recorded during 90° standing turns. A total of 14 HCs, 14 patients with TD, and 14 patients with NTD were recruited. The duration and number of steps in the turning of the TD group were greater than those of the HCs, independent of the turning direction. However, the NTD group had a significantly longer turning duration than did the HC group only toward the paretic side. Their performance was similar when turning toward the non-paretic side; this result is consistent with electromyographic findings. Both TD and NTD groups demonstrated increased amplitudes of trunk muscles compared with the HC groups. Their trunk muscles failed to maintain consistent amplitudes during the entire movement of standing turns in the direction that they required more time or steps to turn toward (i.e., turning in either direction for the TD group and turning toward the paretic side for the NTD group). Patients with stroke had augmented activation of trunk muscles during turning. When patients with TD turned toward either direction and when patients with NTD turned toward the paretic side, the flexible adaptations and selective actions of trunk muscles observed in the HCs were absent. Such distinct activation patterns during turning may contribute to poor turning performance and elevate the risk of falling. Our findings provide insights into the contribution and importance of trunk muscles during turning and the association with TD after stroke. These findings may help guide the development of more effective rehabilitation therapies that target specific muscles for those with TD.

The effect of fatigue on trunk muscle activation patterns and spine postures during simulated firefighting tasks

Ergonomics ◽  
2008 ◽  
Vol 51 (7) ◽  
pp. 1032-1041 ◽  
Author(s):  
Diane E. Gregory ◽  
Sonia Narula ◽  
Samuel J. Howarth ◽  
Caryl Russell ◽  
Jack P. Callaghan
Keyword(s):  
Muscle Activation ◽  
Trunk Muscle ◽  
Activation Patterns ◽  
Muscle Activation Patterns

scholarly journals Trunk Muscle Activation Patterns, Lumbar Compressive Forces, and Spine Stability When Using the Bodyblade

2007 ◽  
Vol 87 (2) ◽  
pp. 153-163 ◽  
Author(s):  
Janice M Moreside ◽  
Francisco J Vera-Garcia ◽  
Stuart M McGill
Keyword(s):  
Lumbar Spine ◽  
Muscle Activation ◽  
Trunk Muscle ◽  
Maximal Voluntary Isometric Contraction ◽  
Activation Patterns ◽  
Spine Stability ◽  
3 Dimensional ◽  
Muscle Activation Patterns ◽  
Shoulder Muscles ◽  
Spine Pathology

Background and Purpose The objective of this study was to analyze the trunk muscle activation patterns, spine kinematics, and lumbar compressive forces that occur when using the Bodyblade, a popular tool in physical medicine clinics. Subjects The participants were 14 male subjects who were healthy and who were recruited from a university population. Methods With data collected from surface electromyography of selected trunk and shoulder muscles, video analysis, and a 3-dimensional lumbar spine position sensor, modeling methods were used to quantify L4−5 compressive forces and spine stability. Results Large-amplitude oscillation of a vertically oriented Bodyblade resulted in the greatest activation levels of the internal oblique and external oblique muscles (average amplitude=48% and 26% of maximal voluntary isometric contraction, respectively), which were associated with L4−5 compressive forces as high as 4,328 N. Instantaneous stability increased with well-coordinated effort, muscle activation, and compression, but decreased when subjects had poor technique. Discussion and Conclusion The way the Bodyblade is used may either enhance or compromise spine stability. Associated lumbar compressive forces may be inappropriate for some people with compression-intolerant lumbar spine pathology.

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