Iliopsoas muscles

Authors
Affiliations

Nate Yomogida, B.S., SPT

Doctor of Physical Therapy

B.S. in Kinesiology

Chloë Kerstein, B.S., SPT

Doctor of Physical Therapy

B.A. in Neuroscience

Muscles of the Iliac and Anterior femoral regions1

Muscles of the Iliac and Anterior femoral regions1
Figure 1: Muscles of the Abdomen2
Reading list
  • Psoas major, psoas minor, iliacus muscles3
  • Neuman4
    #| label: tbl-iliopsoas-oian
    #| warning: false
    #| message: false
    #| echo: false
    #| tbl-cap: "Iliopsoas muscle group"

    from pathlib import Path
    import pandas as pd
    from pyprojroot import here
    from IPython.core.display import display, HTML

    # Set the path for the script file
    script_file_path = here("scripts/process_oian_table.py")

    # Check if the script file exists
    if script_file_path.exists():
        import sys
        sys.path.append(str(script_file_path.parent))  # Add the directory of the script to the system path

        from process_oian_table import process_oian_table  # Import the specific function

        # Define the column to filter by and the identifiers to include
        filter_column = 'group_identifier'  # Choose the column you want to filter by
        filter_identifiers = ['iliopsoas_muscles']  # Replace with actual identifiers you want to include

        # Call the function to get the HTML table with filtering
        html_table = process_oian_table(filter_column=filter_column, filter_identifiers=filter_identifiers)

        if html_table:
            # Render the HTML table for display
            display(HTML(html_table))  # Use display to render the HTML properly
    else:
        print("Script file does not exist. Please check the path.")
/var/folders/1l/3yjsq4vn4q92b8_bq89ptr800000gn/T/ipykernel_96987/2050710442.py:10: DeprecationWarning:

Importing display from IPython.core.display is deprecated since IPython 7.14, please import from IPython.display
Muscle Origin Insertion Innervation Action
Iliacus Iliac Fossa Lesser Trochanter Femoral n.
L2 - L3		 Hip: Flexion, ER
L/S (UNIL contraction on fixed femur): I/L spine sidebend
L/S (BIL contraction): Raises trunk from supine position
Psoas Major T12-L4 and associated IV discs
L1-L5 TP		 Lesser Trochanter Lumbar Plexus Direct Br.
L1 - L3		 Hip: Flexion, ER
L/S (unilateral contraction with femur fixed): I/L spine sidebend
L/S (bilateral contraction): Raises trunk from supine position
Psoas Minor T12, L1 vertebrae (lateral aspect) and IVD Pectineal Line
Iliopubic ramus
Iliac fascia
Inguinal ligament		 Spinal nn.
L1 - L3		 Trunk: Weak flexion

The iliopsoas is the most powerful hip flexor5.

Manual muscle tests

The iliopsoas muscle group act as synergists during:

Muscle length test (MLT)

Stretches

References

1.
Gray H. Anatomy of the Human Body. 20th ed. (Lewis WH, ed.). Lea & Febiger; 1918. https://www.bartleby.com/107/
2.
Betts JG, Blaker W. Anatomy and Physiology. 2nd ed. OpenStax; 2022. https://openstax.org/details/books/anatomy-and-physiology-2e/?Book%20details
3.
Donnelly JM, Simons DG, eds. Travell, Simons & Simons’ Myofascial Pain and Dysfunction: The Trigger Point Manual. Third edition. Wolters Kluwer Health; 2019.
4.
Neumann DA, Kelly ER, Kiefer CL, Martens K, Grosz CM. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed. Elsevier; 2017.
5.
Jones B. B Project Foundations. b Project; 2025.
6.
Weinstock D. NeuroKinetic Therapy: An Innovative Approach to Manual Muscle Testing. North Atlantic Books; 2010.

Citation

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