Posterior Abdominal Wall Muscles

May 8, 2022 | Group

The muscles that compose the posterior abdominal wall are powerful stabilizers of the lumbar spine and their disfunction is often involved in spine problems (together with anterior muscles). They are:

  • Psoas Major: due to the common insertion with the Iliacus, it is often described as Iliopsoas;
  • Psoas Minor;
  • Quadratus Lumborum: this muscle can be divided into 3 parts from a functional point of view:
    • Quadratus lumborum – Iliocostal division;
    • Quadratus Lumborum – Iliolumbar division;
    • Quadratus Lumborum – Lumbocostal division.

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