Imagine standing and crossing your arms (i.e. so that your right hand touches your left thigh and your left hand touches your right thigh). This would be considered the fiber direction of your External obliques which are the most superficial abdominal muscles. Deep to the external obliques are your internal oblique muscles. Your internal obliques run mostly perpendicular to your external obliques (i.e. opposite direction). The next layer of the abdominal muscles are the transverse abdominals whose fiber direction is parallel (horizontal) to the ground (when standing).
Hope this helps.
internal oblique opposes the external oblique
External Oblique Internal Oblique Transversus Abdominis REctus Abdominis
internal oblique
internal oblique by an Anatomy student
From superficial to deep the mucsles are: external oblique internal oblique transversus abdominis
There are 4 muscles that make up your abdominal muscle anatomy: rectus abdominis, external oblique, internal oblique, and transverse abdominis.
External oblique, internal oblique, and transversus abdominis
-external oblique -internal oblique -transversus abdominis -rectus abdominis
transverse abdominis, external oblique, and internal oblique.
The cat's muscle fibers run perpendicular to its internal oblique muscles. The fibers of the external oblique muscles run opposite of the muscles.
There are actually four: The External oblique, internal oblique, rectus abdominis and the transversus abdominis.
The right internal oblique and the left external oblique contract as the torso flexes and rotates to bring the left shoulder towards the right hip. The left internal oblique and the right external oblique rotates the right shoulder to the left hip (as in grapping for your seat belt). For this reason, the internal obliques are referred to as "same side rotators."