scholarly journals Waist Circumference, a Clinical Measurement for the Activity of Transversus Abdominis

2021 ◽  
Vol 19 (3) ◽  
pp. 273-278
Author(s):  
Mojtaba Kamyab ◽  
◽  
Brendan McHugh ◽  
Roy Bowers ◽  
◽  
...  
Keyword(s):  
Waist Circumference ◽  
Inverse Relationship ◽  
Pearson Correlation ◽  
Abdominal Muscle ◽  
Transversus Abdominis ◽  
Formal Training ◽  
Abdominal Muscles ◽  
Clinical Settings ◽  
Spinal Stability ◽  
Pressure Biofeedback

Objectives: Improving the timing and endurance of the deep abdominal muscles, notably transversus abdominis (TrA), is a known protocol for improving spinal stability. TrA is the deepest abdominal muscle, and monitoring its activity is a difficult task. Ultrasound and pressure biofeedback have been employed for monitoring the activity of TrA; however, these methods are expensive, not always available in all clinical settings, and their application requires formal training. The purpose of this study was to examine the use of a broadly known method, i.e., changes in the waist circumference, to monitor the activity of TrA. Methods: The study was carried out on 14 subjects following a pilot study of 5 participants. The thickness of TrA measured by ultrasound was considered the standard indicator for activity of TrA and was compared with simuObjectives: Improving the timing and endurance of the deep abdominal muscles, notably transversus abdominis (TrA), is a known protocol for improving spinal stability. TrA is the deepest abdominal muscle, and monitoring its activity is a difficult task. Ultrasound and pressure biofeedback have been employed for monitoring the activity of TrA; however, these methods are expensive, not always available in all clinical settings, and their application requires formal training. The purpose of this study was to examine the use of a broadly known method, i.e., changes in the waist circumference, to monitor the activity of TrA. Methods: The study was carried out on 14 subjects following a pilot study of 5 participants. The thickness of TrA measured by ultrasound was considered the standard indicator for activity of TrA and was compared with simultaneous measurement of waist circumference. Results: A significant criterion validity between the thickness of TrA and the waist circumference was established (Pearson correlation=-0.71, P=0.001), indicating an inverse relationship between changes in the thickness of the transversus abdominis muscle and waist circumference. Discussion: This result confirmed the hypothesis that changes in the waist circumference could be employed as a suitable indicator for the activity of TrA.ltaneous measurement of waist circumference. Results: A significant criterion validity between the thickness of TrA and the waist circumference was established (Pearson correlation=-0.71, P=0.001), indicating an inverse relationship between changes in the thickness of the transversus abdominis muscle and waist circumference. Discussion: This result confirmed the hypothesis that changes in the waist circumference could be employed as a suitable indicator for the activity of TrA.

scholarly journals Relationship between Transversus Abdominis Strength and Lumbar Lordosis in Young Adults

2021 ◽  
pp. 62-70
Author(s):  
Niketa Patel ◽  
Deepali Dinesh Patil ◽  
Lata Parmar
Keyword(s):  
Young Adults ◽  
Lumbar Lordosis ◽  
Pearson Correlation ◽  
Negative Relationship ◽  
Transversus Abdominis ◽  
Abdominal Muscles ◽  
Transverse Abdominis ◽  
Pressure Biofeedback ◽  
Age Range ◽  
The Relationship

Background: The researchers and clinicians are emphasizing on function of Transverse Abdominis (TrA) which is a deepest abdominal muscles because there is an evidence that TrA is recruited independently of the other abdominal muscles in many different tasks and plays an important role in lumbar stability. Aim: The purpose of this study was to assess the relationship between TrA muscle strength and lumbar lordosis in young adults. Methods: Total 394 subjects were recruited from the constituent institutions of Sumandeep Vidyapeeth with the age range 18-35years. All the subjects, Lumbar lordosis angle and their TrA strength were measured with the Flexicurve and Pressure Biofeedback Unit respectively. Lumbar lordosis angle was calculated using established formula. Average of 03 trials was considered for TrA strength. Results: Pearson correlation coefficient was -0.18 on correlating Lumbar lordosis angle with TrA strength, -0.09 for age with TrA strength and 0.11 for age with lumbar lordosis angle. Conclusion: This study concludes that there is negative relationship between lumbar lordosis and TrA i.e. as the lumbar lordosis angle increases, the strength of TrA muscle decreases.

Expiratory muscle activity in the awake and sleeping human during lung inflation and hypercapnia

1992 ◽  
Vol 72 (3) ◽  
pp. 881-887 ◽  
Author(s):  
Y. Wakai ◽  
M. M. Welsh ◽  
A. M. Leevers ◽  
J. D. Road
Keyword(s):  
Lung Volume ◽  
Muscle Activity ◽  
Ventilatory Threshold ◽  
Minute Ventilation ◽  
Abdominal Muscle ◽  
Transversus Abdominis ◽  
Abdominal Muscles ◽  
Lung Inflation ◽  
Expiratory Muscle ◽  
Intramuscular Electrodes

Expiratory muscle activity has been shown to occur in awake humans during lung inflation; however, whether this activity is dependent on consciousness is unclear. Therefore we measured abdominal muscle electromyograms (intramuscular electrodes) in 13 subjects studied in the supine position during wakefulness and non-rapid-eye-movement sleep. Lung inflation was produced by nasal continuous positive airway pressure (CPAP). CPAP at 10–15 cmH2O produced phasic expiratory activity in two subjects during wakefulness but produced no activity in any subject during sleep. During sleep, CPAP to 15 cmH2O increased lung volume by 1,260 +/- 215 (SE) ml, but there was no change in minute ventilation. The ventilatory threshold at which phasic abdominal muscle activity was first recorded during hypercapnia was 10.3 +/- 1.1 l/min while awake and 13.8 +/- 1 l/min while asleep (P less than 0.05). Higher lung volumes reduced the threshold for abdominal muscle recruitment during hypercapnia. We conclude that lung inflation alone over the range that we studied does not alter ventilation or produce recruitment of the abdominal muscles in sleeping humans. The internal oblique and transversus abdominis are activated at a lower ventilatory threshold during hypercapnia, and this activation is influenced by state and lung volume.

Comparison of core stabilization techniques on ultrasound imaging of the diaphragm, and core muscle thickness and external abdominal oblique muscle electromyography activity

2021 ◽  
pp. 1-9
Author(s):  
Jaejin Lee ◽  
Dohyun Kim ◽  
Yoonkyum Shin ◽  
Chunghwi Yi ◽  
Hyeseon Jeon ◽  
...  
Keyword(s):  
Muscle Thickness ◽  
Random Order ◽  
Abdominal Muscle ◽  
Core Stability ◽  
Oblique Muscle ◽  
Abdominal Muscles ◽  
Amplitude Analysis ◽  
Core Stabilization ◽  
Co Activation ◽  
Pressure Biofeedback

BACKGROUND: To restore core stability, abdominal drawing-in maneuver (ADIM), abdominal bracing (AB), and dynamic neuromuscular stabilization (DNS) have been employed but outcome measures varied and one intervention was not superior over another. OBJECTIVE: The purpose of this study was to compare the differential effects of ADIM, AB, and DNS on diaphragm movement, abdominal muscle thickness difference, and external abdominal oblique (EO) electromyography (EMG) amplitude. METHODS: Forty-one participants with core instability participated in this study. The subjects performed ADIM, AB, and DNS in random order. A Simi Aktisys and Pressure Biofeedback Unit (PBU) were utilized to measure core stability, an ultrasound was utilized to measure diaphragm movement and measure abdominal muscles thickness and EMG was utilized to measure EO amplitude. Analysis of variance (ANOVA) was conducted at P< 0.05. RESULTS: Diaphragm descending movement and transverse abdominis (TrA) and internal abdominal oblique (IO) thickness differences were significantly increased in DNS compared to ADIM and AB (P< 0.05). EO amplitude was significantly increased in AB compared to ADIM, and DNS. CONCLUSIONS: DNS was the best technique to provide balanced co-activation of the diaphragm and TrA with relatively less contraction of EO and subsequently producing motor control for efficient core stabilization.

scholarly journals Impact of acute ascites on the action of the canine abdominal muscles

2008 ◽  
Vol 104 (6) ◽  
pp. 1568-1573 ◽  
Author(s):  
Dimitri Leduc ◽  
André De Troyer
Keyword(s):  
Muscle Length ◽  
Abdominal Muscle ◽  
Transversus Abdominis ◽  
Oblique Muscle ◽  
Abdominal Muscles ◽  
Cross Sectional ◽  
Control Value ◽  
Airway Opening ◽  
Internal Oblique ◽  
Resting Muscle

Although ascites causes abdominal expansion, its effects on abdominal muscle function are uncertain. In the present study, progressively increasing ascites was induced in supine anesthetized dogs, and the changes in abdominal (ΔPab) and airway opening (ΔPao) pressure obtained during stimulation of the internal oblique and transversus abdominis muscles were measured; the changes in internal oblique muscle length were also measured. As ascites increased from 0 to 100 ml/kg body wt, Pab and muscle length during relaxation increased. ΔPab also showed a threefold increase ( P < 0.001). However, ΔPao decreased ( P < 0.001). When ascites increased further to 200 ml/kg, resting muscle length continued to increase and muscle shortening during stimulation became very small so that active muscle length was 155% of the resting muscle length in the control condition. Concomitantly, ΔPab returned to the control value, and ΔPao continued to decrease. Similar results were obtained with the animals in the head-up posture, although the decrease in ΔPao appeared only when ascites was greater than 125 ml/kg. It is concluded that 1) ascites adversely affects the expiratory action of the abdominal muscles on the lung; 2) this effect results primarily from the increase in diaphragm elastance; and 3) when ascites is severe, the abdomen cross-sectional area is also increased and the abdominal muscles are excessively lengthened so that their active pressure-generating ability itself is reduced.

Exercising on Different Unstable Surfaces Increases Core Abdominal Muscle Thickness: An Observational Study Using Real-Time Ultrasound

2019 ◽  
Vol 28 (8) ◽  
pp. 803-808
Author(s):  
Timothy J. Gibbons ◽  
Marie-Louise Bird
Keyword(s):  
Positive Impact ◽  
Exercise Adherence ◽  
Muscle Thickness ◽  
Abdominal Muscle ◽  
Healthy Adults ◽  
Transversus Abdominis ◽  
Abdominal Muscles ◽  
Linear Modeling ◽  
Internal Oblique ◽  
Ultrasound Investigation

Background: The training of abdominal muscles has a positive impact on the functional capacity of healthy adults, being applied practically in fields of athletics and fitness through rehabilitation for lower back pain. Objective: The study compares abdominal muscle activity while performing graded isometric exercises on stable and unstable surfaces. The authors also examined perceived stability and comfort for the different surfaces. Methods: A total of 30 young, healthy adults performed 3 graded isometric exercises on a Pilates table, foam roller, and Oov (a newly developed tool). Ultrasound investigation measured transversus abdominis, internal oblique abdominis, and external oblique abdominis thickness during each task, comparing muscle thickness between conditions using general linear modeling. Results: Core abdominal activation was greater on the foam roller than the Oov and Pilates table during crook lying (bilateral leg support). Both Oov and foam roller elicited greater contralateral transversus abdominis and internal oblique abdominis thickness than the Pilates table during tabletop and straight leg raises (unilateral leg exercises). For transversus abdominis only, the foam roller elicited more muscle thickness than the Oov during straight leg raises. The Oov was rated more comfortable than the foam roller. Discussion: Exercises performed on the Oov and foam roller elicit core greater abdominal muscle thickness than those performed on a Pilates table. Unilateral leg exercises in a supine position elicit more contralateral muscle thickness than those with bilateral leg support. Conclusions: These results provide information to support choices in exercise progression from flat stable to more unstable surfaces and from those with bilateral foot support to unilateral foot support. The Oov was more comfortable that the foam roller, and this may help with exercise adherence.

Posture effects on timing of abdominal muscle activity during stimulated ventilation

1999 ◽  
Vol 86 (6) ◽  
pp. 1994-2000 ◽  
Author(s):  
Tadashi Abe ◽  
Takumi Yamada ◽  
Tomoyuki Tomita ◽  
Paul A. Easton
Keyword(s):  
Muscle Activity ◽  
Muscle Activation ◽  
Moving Average ◽  
Abdominal Muscle ◽  
Transversus Abdominis ◽  
Emg Activity ◽  
Abdominal Muscles ◽  
External Oblique ◽  
End Tidal ◽  
Internal Oblique

In humans during stimulated ventilation, substantial abdominal muscle activity extends into the following inspiration as postexpiratory expiratory activity (PEEA) and commences again during late inspiration as preexpiratory expiratory activity (PREA). We hypothesized that the timing of PEEA and PREA would be changed systematically by posture. Fine-wire electrodes were inserted into the rectus abdominis, external oblique, internal oblique, and transversus abdominis in nine awake subjects. Airflow, end-tidal CO2, and moving average electromyogram (EMG) signals were recorded during resting and CO2-stimulated ventilation in both supine and standing postures. Phasic expiratory EMG activity (tidal EMG) of the four abdominal muscles at any level of CO2 stimulation was greater while standing. Abdominal muscle activities during inspiration, PEEA, and PREA, were observed with CO2stimulation, both supine and standing. Change in posture had a significant effect on intrabreath timing of expiratory muscle activation at any level of CO2stimulation. The transversus abdominis showed a significant increase in PEEA and a significant decrease in PREA while subjects were standing; similar changes were seen in the internal oblique. We conclude that changes in posture are associated with significant changes in phasic expiratory activity of the four abdominal muscles, with systematic changes in the timing of abdominal muscle activity during early and late inspiration.

Mechanical response to hyperinflation of the two abdominal muscle layers

1989 ◽  
Vol 66 (5) ◽  
pp. 2189-2195 ◽  
Author(s):  
A. M. Leevers ◽  
J. D. Road
Keyword(s):  
Functional Residual Capacity ◽  
Muscle Length ◽  
Abdominal Muscle ◽  
Transversus Abdominis ◽  
Abdominal Muscles ◽  
Lung Inflation ◽  
Residual Capacity ◽  
Length Changes ◽  
External Oblique ◽  
Internal Oblique

Abdominal muscle length changes and activity were directly examined in vivo with the use of the techniques of sonomicrometry and electromyography, respectively, in nine supine anesthetized dogs. Expiratory threshold loading was utilized to stimulate recruitment of the abdominal muscles, and lung inflations produced the passive relationships. The internal layer, consisting of the internal oblique and transversus abdominis, shortened more in expiration than the external layer, consisting of the external oblique and rectus abdominis. The internal oblique shortened to approximately 83% of its length at functional residual capacity vs. 98% for the external oblique (P less than 0.05). The results obtained during passive lung inflation indicate these internal muscles are also more influenced by changes in lung volume. The internal oblique lengthened to 115% of its length at functional residual capacity vs. 103% for external oblique at total lung capacity (P less than 0.05). The results suggest that anatomic division of the abdominal muscles into external and internal layers corresponds to functional differences in terms of both passive lengthening and active shortening during ventilation and that these differences imply variable functions of the two layers.

scholarly journals Comparison of Lateral Abdominal Muscle Thickness and Cross-Sectional Area of Multifidus in Adults with and without Scoliosis

2019 ◽  
Author(s):  
Nahid Rahmani
Keyword(s):  
Functional Disability ◽  
Muscle Thickness ◽  
Abdominal Muscle ◽  
Transversus Abdominis ◽  
Muscle Size ◽  
Abdominal Muscles ◽  
Multifidus Muscle ◽  
Cross Sectional ◽  
Lumbar Multifidus ◽  
Significant Difference

Abstract Background: Scoliosis is common in students with a prevalence of 1-2% in teenagers and more than 50% in adults ≥ 60 years. The aim was to compare the abdominal and multifidus muscles size in adults with and without scoliosis. Methods: Forty men with and without scoliosis were recruited. The Visual Analogue Scale and the Oswestry Disability Questionnaire were used to evaluate the pain intensity and functional disability in the patients’ group, respectively. Subjects were asked to lie down in a supine position with their knees bent to measure abdominal muscles using sonography. The linear transducer was placed vertically on the anterolateral abdominal wall to record images of the abdominal muscles (Transversus abdominis, internal oblique, external oblique). To assess the lumbar multifidus muscle size, the curvilinear head was used horizontally on the multifidus muscle at the L5-S1 level in a prone lying position. Results: No significant difference was found between the two groups for demographic variables. A significant difference was found between the healthy subjects and patients with scoliosis for right and left abdominal and multifidus muscles size (p<0.05). No significant difference was reported between the two sides of the convexity and concavity on muscles size in patients with scoliosis (p>0.05). Conclusions: According to the results, patients with scoliosis had smaller abdominal and lumbar multifidus muscles size, but no significant differences were found between the muscle size of the concave and convex sides in the scoliosis group. Future work is needed to support the findings of the current study.

scholarly journals Effect of the Abdominal Draw-In Maneuver and Bracing on Abdominal Muscle Thickness and the Associated Subjective Difficulty in Healthy Individuals

Healthcare ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 496
Author(s):  
Sachiko Madokoro ◽  
Masami Yokogawa ◽  
Hiroichi Miaki
Keyword(s):  
Muscle Thickness ◽  
Abdominal Muscle ◽  
Transversus Abdominis ◽  
Oblique Muscle ◽  
Spinal Stability ◽  
Effective Training ◽  
External Oblique ◽  
Orthopedic Diseases ◽  
Internal Oblique ◽  
Made In

We evaluated the trunk abdominal muscle thickness while performing different exercises to identify the most effective training and to investigate the subjective difficulty associated with exercising. Twenty-eight men (mean age: 21.6 ± 0.9 years) without orthopedic diseases were enrolled. Ultrasonic imaging was used to measure the thickness of the transversus abdominis (TA), internal oblique, and external oblique muscles while at rest and while performing the abdominal draw-in maneuver and abdominal bracing. Measurements were made in the supine and sitting positions, and the subjective difficulty in performing each exercise was examined using a 5-level evaluation scale. The TA and internal oblique muscle thicknesses were significantly greater during the abdominal draw-in maneuver (ADIM) than during bracing or resting, in the supine and sitting positions. The subjective difficulty of abdominal bracing (AB) was graded significantly higher than that of ADIM. Additionally, a correlation between subjective difficulty and muscle thickness was found for the TA and IO. Our results may contribute to the choice of more effective exercises for spinal stability.

Abdominal muscle activity during hypercapnia in awake dogs

1994 ◽  
Vol 77 (3) ◽  
pp. 1393-1398 ◽  
Author(s):  
A. M. Leevers ◽  
J. D. Road
Keyword(s):  
Tidal Volume ◽  
Muscle Layer ◽  
Abdominal Muscle ◽  
Rectus Abdominis ◽  
Transversus Abdominis ◽  
Emg Activity ◽  
Abdominal Muscles ◽  
Co2 Rebreathing ◽  
External Oblique ◽  
Internal Oblique

We previously found the internal abdominal muscle layer to be preferentially recruited during expiratory threshold loading in anesthetized and awake dogs. Expiratory threshold loading increases end-expiratory lung volume and hence can activate reflex pathways such as tonic vagal reflexes, which could influence abdominal muscle recruitment. Our objectives in the present study were to determine the effects of hypercapnia on abdominal muscle activation and the pattern of recruitment in awake dogs. Five tracheotomized dogs were chronically implanted with sonomicrometer transducers and fine-wire electromyogram (EMG) electrodes in each of the four abdominal muscles: transversus abdominis, internal oblique, external oblique, and rectus abdominis. Muscle length changes and EMG activity were studied in the awake dog at rest and during CO2 rebreathing. CO2 rebreathing produced a tripling of tidal volume and activation of the abdominal muscles. Despite the increase in tidal volume, there was no significant change in abdominal muscle end-inspiratory length. Both tonic and phasic expiratory shortening were greater in the internal muscle layer (transversus abdominis and internal oblique) than in the external muscle layer (external oblique and rectus abdominis). We conclude that the internal abdominal muscles are preferentially recruited by hypercapnia and vagal reflexes probably do not contribute to this differential recruitment but that segmental reflexes may be involved. The mechanical consequences of this recruitment are discussed.

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