Ultrasound measurement of deep abdominal muscle activity in sitting positions with different stability levels in subjects with and without chronic low back pain

Rasouli, Omid; Arab, Amir Massoud; Amiri, Masoud; Jaberzadeh, Shapour

doi:10.1016/j.math.2011.01.009

Cited by 64 publications

(56 citation statements)

References 27 publications

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“…42,46,50 USI has also been used for screening purposes 18 and as a source of real-time biofeedback, as it is presumed to be reflective of muscle activity during exercises commonly employed in rehabilitation programs. 15,38 Although some authors have stated that changes in muscle thickness measured with USI can be used as surrogate measures of muscle activity 11,34,42 and activation, 31,40,41,44 evidence T T STUDY DESIGN: Validation study.…”

mentioning

confidence: 99%

Association Between Changes in Electromyographic Signal Amplitude and Abdominal Muscle Thickness in Individuals With and Without Lumbopelvic Pain

Whittaker¹,

McLean²,

Hodder³

et al. 2013

J Orthop Sports Phys Ther

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The muscles of the abdominal wall play a role in controlling motion of the spine, 1,20,21,24 and there is evidence of dysfunction of this musculature in persons with lumbopelvic pain (LPP). Proposed dysfunctions range from delayed onset 23 and seemingly diminished responses (smaller increase in thickness) of the transversus abdominis (TrA) 46,48 to increased electromyographic (EMG) signal amplitude and greater responses (larger increase in thickness) of the rectus abdominis (RA) and external and internal oblique (EO and IO) muscles.2,39,49 As these abnormalities have been linked to pain and dysfunction, there is interest in developing methods to accurately assess function of the abdominal musculature.Ultrasound imaging (USI) is a noninvasive and valid method to quantify abdominal muscle size 19 and is currently used in rehabilitation, in part, under the assumption that changes in muscle thickness reflect the extent of muscle contraction.42,46,50 USI has also been used for screening purposes 18 and as a source of real-time biofeedback, as it is presumed to be reflective of muscle activity during exercises commonly employed in rehabilitation programs. 15,38 Although some authors have stated that changes in muscle thickness measured with USI can be used as surrogate measures of muscle activity 11,34,42 and activation, 31,40,41,44 evidence T T STUDY DESIGN: Validation study. T T OBJECTIVES:To investigate the association between changes in electromyographic (EMG) signal amplitude and sonographic measures of muscle thickness of 4 abdominal muscles, during 2 clinical tests, in adults with and without lumbopelvic pain. T T BACKGROUND:There is a trend in rehabilitation to use ultrasound imaging (USI) to determine the extent of abdominal muscle contraction. However, the literature investigating the relationship between abdominal muscle thickness change and level of activation is inconclusive and has not included clinically relevant tasks. T T METHODS:Simultaneous recording from finewire EMG and USI was performed for 4 abdominal muscles, in 7 adults with lumbopelvic pain (mean  SD age, 29.7  12.0 years) and 7 adults without lumbopelvic pain (32.0  10.6 years), during an active straight leg raise (ASLR) test and an abdominal drawing-in maneuver (ADIM). Cross-correlation functions and linear regression analyses were used to describe the relationship between the 2 measures. Analyses of variance were used to compare individuals with and without lumbopelvic pain, with an alpha set at .05. T T RESULTS:Across all muscles, peak crosscorrelation values were low (ASLR, r = 0.28  0.09; ADIM, r = 0.35  0.11), and there was large variability in associated time lags (ASLR, τ = 0.69  2.56 seconds; ADIM, τ = 0.53  3.75 seconds). Regression analyses did not detect a systematic pattern of association between EMG signal amplitude and USI measurements, and analyses of variance revealed no differences between cohorts.

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mentioning

confidence: 99%

Association Between Changes in Electromyographic Signal Amplitude and Abdominal Muscle Thickness in Individuals With and Without Lumbopelvic Pain

Whittaker¹,

McLean²,

Hodder³

et al. 2013

J Orthop Sports Phys Ther

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“…Compared to stable surfaces, unstable surfaces are known to be more effective at activating the deep muscles which are known to be closely related to spinal stability, such as the transversus abdominis and the multifidus 4) . Rasouli et al 17) reported that the transversus abdominis showed higher activity when the trunk was controlled in the sitting position on a Swiss ball, as used in the present study, than when the trunk was controlled in the sitting position on a hard desk. These results support the outcomes of the present study, that trunk control exercises performed on unstable surfaces are efficient at improving low back pain patients' spinal stability.…”

Section: Discussionmentioning

confidence: 43%

The Effect of Trunk Control Exercises Performed on Unstable Surfaces on the Spinal Stability of Low Back Pain Patients

2013

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Abstract.[Purpose] The present study was designed to investigate the effect of trunk control exercise on an unstable surface on spinal stability of low back pain patients. [Subjects] In total, 21 participants were assigned to a trunk experimental group (TG, n=11) or a control group (CG, n=10). In addition to conventional therapy, the TG received trunk control exercise on a Swiss ball for 20 minutes, 4 times a week, for 8 weeks.[Methods] The ability to move the center of gravity (COP) forward, backward, left, and right and the ability to maintain the COP in these positions were measured using the Air Balance 3D System to evaluate spinal stability.[Results] There were significant differences between CG and TG in the ability to move the COP and the ability to maintain the COP in the forward and backward directions.[Conclusion] These results suggest that trunk control exercise on an unstable surface improves the spinal stability of low back pain patients.

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“…The consequence of increased posterior pelvis tilt are decreased activation of the multifidius and erector spinae (longissimus) muscles, as well as a weakness of the abdominal and buttock muscles [15]. Rasouli [16] confirms the relationship between the slump postion and low activity of the transversus abdominis muscle [16]. This position also has consequences for the diaphragm, as it reduces the amplitude of its movement and activates the accessory inspiratory muscles of the upper-thoracic respiratory tract [4].…”

Section: Methodsmentioning

confidence: 99%

Musculo-skeletal and pulmonary effects of sitting position – a systematic review

Szczygieł¹,

Zielonka²,

Mętel³

et al. 2017

Ann Agric Environ Med.

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Szczygieł E, Zielonka K, Mętel S, Golec J. Musculo-skeletal and pulmonary effects of sitting position -a systematic review. Ann Agric Environ Med. 2017; 24(1): 8-12. doi: 10.5604/12321966.1227647 Abstract Introduction. Year after year, we spend an increasing amount of time in a sitting position. Often, we sit with poor posture, as indicated by numerous pain syndromes within the musculoskeletal system. Several reports confirm that body posture and the amount of time spent in a seated position have extensive implications for our health. Previous studies and a literature review suggest there is limited knowledge regarding an ergonomic sitting position. Objective. The aim of the study was to analyze the research relating to a proper sitting position and the consequences of incorrect sitting posture. A database search was conducted in Science Direct, Scopus, PubMed, Medline, and Google Scholar. Selection was made on the basis of titles, then abstracts and full texts of the studies. No limits were applied to the date of publication. Conclusions. Incorrect sitting posture contributes to many disorders, especially in the cervical and lumbar spine. It also determines the work of the respiratory system. Most authors suggest that maintenance of the physiological curvature of the spine is crucial for the biomechanics of the sitting position, as well as the location of the head and position of the pelvis. It raises awareness of work-related hazards and the introduction of education on the principles of proper seating. It is necessary to draw attention to the risks associated with work performed in a sitting posture, and education on the principles of ergonomical sitting.

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Ultrasound measurement of deep abdominal muscle activity in sitting positions with different stability levels in subjects with and without chronic low back pain

Cited by 64 publications

References 27 publications

Association Between Changes in Electromyographic Signal Amplitude and Abdominal Muscle Thickness in Individuals With and Without Lumbopelvic Pain

Association Between Changes in Electromyographic Signal Amplitude and Abdominal Muscle Thickness in Individuals With and Without Lumbopelvic Pain

The Effect of Trunk Control Exercises Performed on Unstable Surfaces on the Spinal Stability of Low Back Pain Patients

Musculo-skeletal and pulmonary effects of sitting position – a systematic review

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