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Origins Insertions And Actions of the Muscles of the Anterior Abdominal Wall

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dellg85's version from 2016-02-26 14:29

Section

MuscleOriginInsertionAction
Transverse AbdominisThoracolumbar fascia, cartilage of the lower 6 ribs and the iliac crestLinea albaCompression of the abdominal cavity and increasing abdominal pressure. Stabilises lumbar spine by creating tension through the TFL and increasing intra-abdominal pressure (IAP)
Rectus AbdominisPubis and symphysis pubisCartilages of ribs 5-7 and base of sternumFlexion of the vertebral column
External ObliquesOuter surface of the bottom 8 ribsMainly linea alba, also iliac crestBilaterally - flexion of the vertebral column and tilts the pelvis posteriorly
Unilaterally - rotation and lateral flexion (in combination with the internal obliques)
Internal ObliquesThoracolumbar fascia and the iliac crestLinea alba and the bottom 3 ribsBilaterally - flexion of the vertebral column
Unilaterally - rotation and lateral flexion (in combination with the external obliques). Stablises the lumbar spine by creating tension through the TLF
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