0 a Latin word meaning "of the abdomen", used in the names of abdominal muscles, for example the transverse abdominis muscle --
The transversus abdominis muscle is flat and triangular, with its fibers running horizontally.
The rectus abdominis muscles are long and flat.
This is sometimes isolated inside-out by inflatable girdles or use of the transversus abdominis muscle.
The medial borders of the right and left halves of the muscle may be palpated during contraction of the rectus abdominis.
Lateral to this muscle, it pierces the transversus abdominis to run above the iliac crest between that muscle and abdominal internal oblique.
Superior to the arcuate line, the internal oblique aponeurosis splits to envelop the rectus abdominis muscle.
It is also where the inferior epigastric vessels perforate the rectus abdominis.
It contains the rectus abdominis and pyramidalis muscles.
