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Internal Oblique

From WikiSM
Schematic of the chest wall musculature indicating the location of muscles. Inspiratory muscles including scalenes, external intercostals, parasternal intercostals and diaphragm are drawn on the left. Expiratory muscles are drawn on the right[1]
Abdominal wall anatomy with different fiber orientations illustrated[2]

Description

Names

  • Internal Oblique
  • Internal Abdominal Oblique

Origin

  • Anterior 2/3 of Iliac Crest
  • Iliopectineal arch
  • Thoracolumbar fascia

Insertion

Actions

  • Bilateral contraction - Trunk flexion, expiration
  • Unilateral contraction - Trunk lateral flexion (ipsilateral) and rotation (ipsilateral)

Vascular Supply

  • Posterior Intercostal Arteries
  • Subcostal Arteries
  • Superior and Inferior Epigastric Arteries
  • Superficial and Deep Circumflex Arteries
  • Posterior Lumbar Arteries

Nerve

Clinical Significance

  • Needs to be updated

See Also

References

  1. ↑ Saboisky, Julian Peter. Neural drive to human respiratory muscles. Diss. UNSW Sydney, 2008.
  2. ↑ Spadoni, Silvia, Silvia Todros, and Piero G. Pavan. "Numerical modeling of the abdominal wall biomechanics and experimental analysis for model validation." Frontiers in Bioengineering and Biotechnology 12 (2024): 1472509.
Created by:
Chris Hauglid on 27 June 2020 20:40:35
Authors:
Last edited:
16 September 2025 22:56:50
Category:
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