Synonyms
Latin: M. obliquus internus abdominis
- To the abdominal musculature overview
- To the musculature overview
The inner oblique abdominal muscle (Musculus obliquus internus abdominis) is a three-sided, approx. 1 cm thick abdominal muscle located directly below the outer oblique abdominal muscle. It is the smallest of the three lateral abdominal muscles.
Attachment: 9th – 12th rib, linea alba Origin: Innervation: Nn. intercostales VIII- XII
- Superficial leaf of the lumbar- dorsal bandage (Fascia thoracolumbalis)
- Middle lip of the iliac crest (Linea intermedia cristae iliacae)
- Lateral half of the inguinal ligament
The contraction is similar to that of the external oblique abdominal muscles, but only laterally reversed. The following exercises are therefore particularly suitable: With the Abdominal Crunch, the effect on the inner oblique abdominal muscles can be increased by turning the upper body to the side during contraction. An overview of all relevant topics in the field of strength training can be found in the Strength Training Overview
- Lateral push-ups
- Abdominal Crunch
If the upper body is tilted or turned to one side, the opposite side is stretched at the same time. For detailed information, please see below:
- Stretching
- Stretching exercises
Function
In a one-sided contraction, the torso is tilted to one side and rotated. It works together with the external oblique abdominal muscles of the opposite side. In addition, the inner oblique abdominal muscle (Musculus obliquus internus abdominis) fixes the trunk when lifting and carrying heavy loads.
