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There are no studies on ultrasound analysis of abdominal muscles in humans. Using a 7. 5 MHz B-mode ultrasound transducer, we investigated the thickness of the abdominal muscle layers in six healthy male subjects. Abdominal muscle thickness was found to be reproducible, which was reproducible. The thickness of IO, TA, and RA significantly increased at RV and during MEEs, relative to FRC; at TLC, the thickness of IO, TA, and RA significantly decreased. In all cases, a significant relationship between Pg and TA thickness was found, with the thickness of the other abdominal muscles being inconsistently related to Pg. Transversus abdominis appears to be the most significant factor in abdominal cramping during progressive expiratory attempts.
Source link: https://doi.org/10.1183/09031936.97.10122861
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