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  2. Quadratus lumborum muscle - Wikipedia

    en.wikipedia.org/wiki/Quadratus_lumborum_muscle

    It is the deepest abdominal muscle, and commonly referred to as a back muscle. Each muscle of the pair is an irregular quadrilateral in shape, hence the name. The quadratus lumborum muscles originate from the wings of the ilium ; their insertions are on the transverse processes of the upper four lumbar vertebrae plus the lower posterior border ...

  3. Rectus abdominis muscle - Wikipedia

    en.wikipedia.org/wiki/Rectus_abdominis_muscle

    A muscle strain occurs when the muscle is stretched too far. When this occurs the muscle fibers are torn. Most commonly, a strain causes microscopic tears within the muscle, but occasionally, in severe injuries, the muscle can rupture from its attachment. A rectus sheath hematoma is an accumulation of blood in the sheath of the rectus abdominis ...

  4. Abdominal muscles - Wikipedia

    en.wikipedia.org/wiki/Abdominal_muscles

    Abdominal muscles cover the anterior and lateral abdominal region and meet at the anterior midline. These muscles of the anterolateral abdominal wall can be divided into four groups: the external obliques , the internal obliques , the transversus abdominis , and the rectus abdominis .

  5. Abdominal internal oblique muscle - Wikipedia

    en.wikipedia.org/wiki/Abdominal_internal_oblique...

    The muscle fibers run from these points superomedially (up and towards midline) to the muscle's insertions on the inferior borders of the 10th through 12th ribs and the linea alba. In males, the cremaster muscle is also attached to the internal oblique.

  6. Abdominis - Wikipedia

    en.wikipedia.org/wiki/Abdominis

    The abdominal wall is made up of several layers of muscles, which are collectively known as the abdominal muscles. These muscles support the spine, protect the internal organs, and help with movement. The five main abdominal muscles are: Rectus abdominis muscle; External obliques muscle; Internal obliques muscle; Pyramidalis muscle

  7. Transverse abdominal muscle - Wikipedia

    en.wikipedia.org/wiki/Transverse_abdominal_muscle

    Recently, the transverse abdominal has become the subject of debate between biokineticists, kinesiologists, strength trainers, and physical therapists. The two positions on the muscle are (1) that the muscle is effective and capable of bracing the human core during extremely heavy lifts and (2) that it is not.

  8. Abdominal external oblique muscle - Wikipedia

    en.wikipedia.org/wiki/Abdominal_external_oblique...

    The external oblique functions to pull the chest downwards and compress the abdominal cavity, which increases the intra-abdominal pressure as in a Valsalva maneuver.It also performs ipsilateral (same side) side-bending and contralateral (opposite side) rotation: the right external oblique would side-bend to the right and rotate to the left, and vice versa.

  9. Thoracolumbar fascia - Wikipedia

    en.wikipedia.org/wiki/Thoracolumbar_fascia

    The thoracolumbar fascia (lumbodorsal fascia or thoracodorsal fascia) is a complex, [1]: 1137 multilayer arrangement of fascial and aponeurotic layers forming a separation between the paraspinal muscles on one side, and the muscles of the posterior abdominal wall (quadratus lumborum, and psoas major [1]: 1137 ) on the other.