Differences in Transversus Abdominis Muscle Function between Chronic Low Back Pain Patients and Healthy Subjects at Maximum Expiration: Measurement with Real-time Ultrasonography (original) (raw)
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Journal of Physical Therapy Science, 2013
This study examined the contraction rates of abdominal muscles in relation to the posture of chronic lumbar pain patients and normal subjects. [Subjects] The subjects were 17 chronic low back pain (CLBP) patients and 17 normal people between the ages of 20 and 59. [Methods] Experimental postures included a supine position, a sitting position, and a standing position. Measurements were taken at rest and during abdominal contraction. The measurement at rest was taken during expiration with comfortable breathing, and the measurement during contraction was taken at maximum expiration of forced expiration. Muscle contraction rates (on contraction and at relaxation) were calculated. [Results] There were significant differences between CLBP patients and normal subjects in the transversus abdominis (TrA) in the standing position. [Conclusion] Changes in contraction rates of the abdominal muscles of normal subjects and CLBP patients were examined in different postures at maximum expiration. It was found that the contraction rate of TrA in CLBP patients in a standing position, is significantly lower than that of normal subjects.
Journal of Manipulative and Physiological Therapeutics, 2011
Objective: The present study investigated the effect of 2 different lumbar spine postures, neutral and flexed lumbar postures, on transversus abdominis (TrA) muscle function during a voluntary contraction (hollowing and draw-in maneuver) in people with and without low back pain (LBP). Methods: Thirty participants with LBP and 30 healthy participants were recruited for this cross-sectional study. Transversus abdominis muscle function was measured as a change in thickness with ultrasound imaging. Participants performed voluntary TrA contraction in a supine lying position with the lumbar spine in neutral and flexed postures. Data were analyzed using a 2-way (groups, postures) analysis of variance. Results: Lumbar posture influenced TrA function during a voluntary contraction in people with and without LBP. There was a significant main effect of posture (F 1,58 = 16.140, P b .001). Neutral lumbar posture improved participants' ability to recruit TrA in both group (mean difference, 7.5%; 95% confidence interval, 3.8%-11.3%). No significant differences were found between healthy subjects and those with LBP.
2020
BACKGROUND: Low back pain and disc herniation are common problems in the world population, being characterized by discomfort in the region of the spine, resulting in functional capacity and quality of life reduced. Some of the causes of these conditions seem to be associated with the biomechanical imbalance of the muscles that act in the spine. There are methods to assess the level of activation and strength of the stabilizing muscles of the spine, such as the Pressure Biofeedback Unit (PBU). This study aims to compare the level of activation of the transverse abdomen muscle and back strength in healthy, low back pain and herniated disc individuals. METHODOS: a cross-sectional study was carried out with 30 men that were homogeneously distributed in three groups: healthy (HG), with low back pain (LBPG) and with herniated disc (HDG). The primary outcomes were the level of activation of the transversus abdominis, assessed by PBU, and back strength, assessed by dynamometry. Pain, flexib...
Journal of Orthopaedic & Sports Physical Therapy, 2011
T here is considerable evidence to support that the transversus abdominis muscle (TrA) has a role to play in spinal control. Laboratory studies using fine-wire electromyography (EMG) have demonstrated that this muscle activates in advance of limb movement and is independent of movement direction 28-29 in asymptomatic individuals. It has been speculated that this preparatory muscle activity is necessary for spinal control, as it has been observed prior to both anticipated and unexpected spinal perturbations.
2016
Study Design: Randomized, double-blinded, controlled clinical trial. Objective: To measure the effects of dry needling to the lumbar multifidus (MF) muscle for any change in resting and contracted thickness of the transversus abdominis (TrA) muscle as well as symptoms and disability in individuals with low back pain (LBP). Background: Recent studies have demonstrated that individuals with LBP have diminished co-activation of the lumbar MF and TrA muscles, which when working appropriately in healthy individuals, contributes to spinal stability and function. A significant change in the resting and contracted thickness of TrA has been found with dry needling to the lumbar MF in healthy subjects, but this has yet to be studied in individuals with low back pain. Methods: Thirty adults with LBP were randomly assigned to receive dry needling intervention or a sham needling intervention to the lumbar MF. The participants received instruction on the deep corset contraction (DCC) for purposes...
Journal of Bodywork and Movement Therapies, 2012
The Pressure Biofeedback Unit (PBU) is often used by clinicians and researchers to indirectly evaluate transversus abdominis (TrA) muscle activity. The purpose of this study was to evaluate the inter and intra-examiner reproducibility of the PBU in measuring TrA muscle activity in fifty patients with chronic nonspecific low back pain. This study was performed using a test-retest design with a seven day interval. An Intraclass Correlation Coefficient (ICC 2,1 ) of 0.74 (95% CI 0.54 to 0.85) and 0.76 (95% CI 0.58 to 0.86) was observed for the intra and inter-examiner reproducibility, respectively. The intra-examiner agreement (Limits of Agreement -LOA Z 2.1 to À1.8 mmHg) and the inter-examiner agreement (LOA Z 2.0 to À1.9 mmHg) were within the limits of agreement on 95% of occasions. The reproducibility of PBU in measuring TrA muscle activity in patients with chronic nonspecific low back pain ranged from satisfactory to excellent. ª
https://www.ijhsr.org/IJHSR\_Vol.13\_Issue.10\_Oct2023/IJHSR-Abstract05.html, 2023
Background: Lack of control in deep muscles may result into poor segmental support even during activities of daily living in people with or without history of low back pain. This states the importance of muscular system in control of spinal stability. Aim: To evaluate and estimate core strength of lumbar region in normal individuals. Methods and Material: Cross sectional observational study with convenience sampling was carried out on 843 normal healthy individuals between the age group of 18-60 years. Core strength was estimated by pressure biofeedback unit with individual in prone formal test to assess transversus abdominis. Pressure reduction which was held at least up to 10 seconds was noted. The same procedure was repeated for three times and the best of the three repetitions was used for analysis. Statistical analysis: MedCalc version 19.7.4 was used. Reference ranges were calculated with 90% CI with non-parametric percentile method. Results: Reference range was 2-10 mmHg with median 9 mmHg for all the subjects between the age group of 18-60 years. Reference range for males (5-10 mmHg) was higher than females (2-10 mmHg) among this age group. Median for males and females was 10 mmHg and 6 mmHg respectively. Reference ranges was 5-10 mmHg for 18-30 years, 2-10 mmHg for 31-40 years and 41-50 years respectively and 2-9 mmHg for 51-60 years age groups. Conclusions: Reference range for the core strength of lumbar region among normal individuals as measured by pressure biofeedback unit is 2-10 mmHg.