The right transversus abdominis muscle: an ultrasonographic mimic of free peritoneal fluid

1999 ◽  
Vol 6 (2) ◽  
pp. 81-84
Author(s):  
Ronald H. Wachsberg
Keyword(s):  
Peritoneal Fluid ◽  
Transversus Abdominis ◽  
The Right ◽  
Transversus Abdominis Muscle ◽  
Free Peritoneal Fluid

scholarly journals Transversus abdominis and multifidus asymmetry in runners measured by MRI: a cross-sectional study

2019 ◽  
Vol 5 (1) ◽  
pp. e000556
Author(s):  
Ulrike H Mitchell ◽  
A Wayne Johnson ◽  
Patrick J Owen ◽  
Timo Rantalainen ◽  
Daniel Belavy
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Activation ◽  
Cross Sectional Study ◽  
Transversus Abdominis ◽  
Low Back ◽  
Sectional Study ◽  
Multifidus Muscle ◽  
Cross Sectional ◽  
The Right

ObjectiveThe transversus abdominis muscle (TrA) is active during running as a secondary respiratory muscle and acts, together with the multifidus, as trunk stabiliser. The purpose of this study was to determine size and symmetry of TrA and multifidus muscles at rest and with contraction in endurance runners without low back pain.DesignCross-sectional study.SettingA medical imaging centre in Melbourne, Australia.ParticipantsThirty middle-aged (43years±7) endurance-trained male (n=18) and female (n=12) runners without current or history of low back pain.Outcome measuresMRI at rest and with the core engaged. The TrA and multifidus muscles were measured for thickness and length (TrA) and anteroposterior and mediolateral thickness (multifidus). Muscle activation was extrapolated from rest to contraction and compared with the same and contralateral side. Paired t-tests were performed to compare sides and contraction status.ResultsLeft and right TrA and multifidus demonstrated similar parameters at rest (p>0.05). However, with contraction, the right TrA and multifidus (in mediolateral direction) were 9.2% (p=0.038) and 42% (p<0.001) thicker, respectively, than their counterparts on the left. There was no TrA thickness side difference with contraction in left-handed participants (p=0.985). When stratified by sex, the contracted TrA on the right side remained 8.4% thicker, but it was no longer statistically significant (p=0.134). The side difference with contraction of the TrA became less with increasing training age.ConclusionsRight-handed long-term runners without low back pain exhibit a greater right side core muscle activation when performing an isometric contraction. This activation preference diminishes with increasing training age.

scholarly journals Abdominal girth as an index of muscle tension during abdominal hollowing: Selecting the optimal training intensity for the transversus abdominis muscle

2019 ◽  
Vol 89 ◽  
pp. 72-77 ◽  
Author(s):  
Itsuroh Shimizu ◽  
Hiroshige Tateuchi ◽  
Yoshiki Motomura ◽  
Katsuyuki Morishita ◽  
Mitsuhiro Masaki ◽  
...  
Keyword(s):  
Muscle Tension ◽  
Transversus Abdominis ◽  
Training Intensity ◽  
Abdominal Girth ◽  
Transversus Abdominis Muscle

Metabolic fiber types of snake transversus abdominis muscle

1989 ◽  
Vol 256 (6) ◽  
pp. C1176-C1183 ◽  
Author(s):  
R. S. Wilkinson ◽  
P. M. Nemeth
Keyword(s):  
Fumarate Hydratase ◽  
Transversus Abdominis ◽  
Fiber Types ◽  
Contraction Speed ◽  
Vertebrate Muscle ◽  
Oxidative And Glycolytic Enzymes ◽  
Hydroxyacyl Coa Dehydrogenase ◽  
Fast Twitch ◽  
The Relationship ◽  
Transversus Abdominis Muscle

Fibers of the garter snake transversus abdominis muscle fall into three classes according to contraction speed: faster and slower twitch and tonic. To determine the relationship between these physiologically determined classes and established mammalian fiber types, individual fibers were assayed for key enzymes representing the major energy-generating pathways in vertebrate muscle. Five such enzymes were examined: lactate dehydrogenase, malate dehydrogenase, adenylokinase, fumarate hydratase, and beta-hydroxyacyl-CoA dehydrogenase. The muscle contained three principal metabolic fiber types. Fast-contracting twitch fibers had low-oxidative but high-glycolytic capacity and therefore resembled mammalian-type fast-twitch glycolytic (FG) fibers. Slower twitch fibers were high oxidative-high glycolytic, similar to mammalian-type fast-twitch, oxidative, glycolytic (FOG) fibers. Tonic fibers were high oxidative-low glycolytic; this metabolic profile is characteristic of type slow-twitch oxidative (SO) fibers in mammals. Activity of the enzyme adenylokinase, which in mammals correlates with contraction speed and myosin adenosine triphosphatase (ATPase) activity, separated these reptilian fibers into three groups that are similar but not identical to those delineated by oxidative and glycolytic enzymes. Adenylokinase and beta-hydroxyacyl-CoA dehydrogenase showed the widest range of activities in snake muscle and, therefore, the greatest ability to discriminate fiber types.

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