Psoas Minor Muscle, Anterior View

Description

Centered deep to the anterior abdominal wall, the psoas minor appears as a thin fusiform muscle belly lying on the anterior surface of psoas major, with its tendon descending inferiorly toward the iliopectineal eminence and iliac fascia. Superficially, rectus abdominis runs vertically along the midline, while the external oblique forms the lateral abdominal contour; superiorly the pectoralis major and intercostals frame the thorax in the same continuous anterior figure. In the pelvis and proximal thigh, the iliacus occupies the iliac fossa lateral to psoas major, together forming the iliopsoas mass as it courses toward the lesser trochanter, with the quadriceps (rectus femoris, vastus medialis, vastus lateralis) aligned distal to the inguinal region. Clinically, the psoas minor matters less for power and more for landmarks and variants: it is absent unilaterally or bilaterally in a substantial portion of the population, and when present its long tendon can be mistaken for fascia or an accessory slip during dissection or anterior retroperitoneal exposure. Tension or tenderness along the psoas compartment is often discussed in “psoas syndrome,” and this view helps separate the small psoas minor from the much bulkier iliopsoas, the structure more directly implicated in snapping hip and iliopsoas tendinopathy. Clear anterior relationships also support teaching of femoral nerve proximity (between psoas and iliacus) even when the nerve itself is not emphasized. Use this illustration for gross anatomy and musculoskeletal modules covering the posterior abdominal wall, hip flexor compartment, and iliopsoas anatomy, or for surgical and radiology texts that need a clean anterior reference when describing retroperitoneal approaches and pelvic brim landmarks. It also works well in comparative anatomy discussions of variable muscles and accessory tendons in the lumbar region. Anatomical accuracy verified by SciePro's Medical Advisory Board.