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ANATOMY / REFERENCE GALLERY1 / 2 references
The left panel shows the superficial pelvic and thigh muscles, the center panel shows the deep pelvic and thigh muscles. The right panel shows the posterior view of the pelvic and thigh muscles.
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Psoas major

Lumbar muscle joining iliacus at the lesser trochanter.

Zoom in, then drag to inspect. Keyboard: + / − to zoom, arrows to pan, 0 to reset. Tap the numbered markers to explore parts.

The left panel shows the superficial pelvic and thigh muscles, the center panel shows the deep pelvic and thigh muscles. The right panel shows the posterior view of the pelvic and thigh muscles.

Image: OpenStax / University of Hawaiʻi adapted teaching figures; original contributors credited at source · Source / original · CC BY 4.0 — figure credits at source

Numbered markers and focused views are Mediveerse learning overlays; the original reference is linked above.

Iliopsoas

Hip & thigh muscles

Iliopsoas

STRUCTURE & FUNCTION

Understand what you see.

Strong hip flexor with postural roles.

Zoom into the original labels. Practise pointing out each structure, then explain it aloud. Diagrams are teaching references; specimen appearance and slide staining vary.

01 / IDENTIFICATION

How to recognise it.

  1. Combined iliacus and psoas major
  2. Passes anterior to hip
  3. Inserts on lesser trochanter
02 / KEY STRUCTURES

Point them out.

Tap a number to open its reference, zoom in and locate the structure. Numbers stay the same across views. This key follows landmarks visible in the reference images.

Related features & study points (1)

Additional relations, attachments or microscopic details to revise alongside this plate. These are separate from its numbered image landmarks.

  • Lesser trochanter
03 / VIVA PRACTICE

Think first. Then reveal.

Say your answer aloud before opening the suggested response.

01How do you identify iliopsoas?
SUGGESTED ANSWER

Combined iliacus and psoas major. Passes anterior to hip. Inserts on lesser trochanter.

02Do its two parts have identical motor nerves?
SUGGESTED ANSWER

No. Iliacus is supplied chiefly by femoral nerve; psoas major receives direct lumbar anterior-ramus branches.

03Which bursa relates to its tendon at the hip?
SUGGESTED ANSWER

Iliopsoas bursa, between tendon and anterior hip region; it may communicate with the joint.

04What is its main functional or developmental significance?
SUGGESTED ANSWER

Strong hip flexor with postural roles. Key structures to recognise: Psoas major; Iliacus; Lesser trochanter.

Read the references.

Credited anatomical plates, microscopy and university teaching references. Individual image credits appear below the viewer. Historical plates can use older terminology; use the lesson text for current names.