Right psoas major: Anatomy & Interactive 3D

Educational draft · anatomical review pendingSources checked 21 October 2026. Prepared with AI assistance; not yet reviewed by a qualified anatomist. Not for diagnosis or treatment.

Model side: Right
Study group: Iliopsoas · hip flexors

Two components, separate selections

Follow the long surface above the hip. Its trunk study now includes vertebral bones for orientation; attachment footprints are not separately labeled.

Iliacus and psoas major form the iliopsoas functional pair. The viewer keeps the two source surfaces separate; it does not add a third combined muscle mesh.

Sources: University anatomy tables

Attachment overview

Psoas major links the lumbar vertebral region to the femoral lesser trochanter through the iliopsoas tendon.

The trunk study includes lumbar vertebrae and the sacrum for context. Discs and attachment footprints are absent, and the separate hip study still excludes the spine.

Sources: University anatomy tables

Main actions

It flexes the hip and contributes to lumbar flexion and lateral bending.

These are anatomical actions, not an animation performed by the model. Rotation controls move the camera; the study does not calculate contraction or force.

Sources: University anatomy tables

Innervation

Direct branches of the anterior rami of lumbar spinal nerves, rather than the iliacus's femoral-nerve supply.

Nerve paths and the lumbar plexus are not present in this model. The guide does not infer nerve positions from a gap between meshes.

Sources: University anatomy tables

Read the model

Explore right psoas major in 3D

Inspect one surface. Select psoas major and use Isolate, then Focus selection. Inspect Front and Oblique views. Show context restores both psoas major muscles and the available trunk bones.
Compare the pair. Use the two reading cards below the same-side hip viewer. Each opens its own structure page; selecting the opposite side is an explicit choice. Right iliopsoas guides →
Restore the available context. Psoas major pages restore both psoas muscles and the available trunk bones; iliacus pages restore the same-side leg. In the hip study, enable “Show psoas major · trunk context” to compare the pair with the hip bone and femur. The hip study does not include the spine. Right hip in 3D →

What this model can—and cannot—show

BodyParts3D provides this right-sided surface model, not every anatomical variant. Colors distinguish structures; they are not tissue textures.

The trunk study includes lumbar vertebrae and the sacrum for context. Discs and attachment footprints are absent, and the separate hip study still excludes the spine.

Original side-identified BodyParts3D geometry is preserved. Iliacus and psoas major are separate source meshes; a shared tendon, attachment footprints and internal fibers are not independently segmented.

The trunk study now includes lumbar vertebrae and sacrum, but the leg study does not. Psoas minor, short external rotators, nerves and vessels remain absent. This is not a complete posterior abdominal wall or pelvic model. Source checks do not replace specialist anatomical review.

A section tool is not available for this structure. The surface model does not reveal internal tissue architecture or represent a medical scan.

Sources and editorial status

This guide uses independently written explanations with links to the evidence behind them. Source checking and specialist anatomical review are separate steps; the latter is still pending.

TTUHSC El Paso — Kidneys & retroperitoneum: muscle table
Iliacus and psoas major attachments, actions and distinct nerve supplies. Original concise explanations; no table text or illustrations reproduced.
TTUHSC El Paso — Anterior & medial thigh
Iliopsoas as the iliacus–psoas major pair and its femoral attachment.

3D geometry and its separate license are credited beneath the viewer. References do not imply endorsement of this site.

Right psoas major