The origins are on the lumbar vertebrae (psoas major and psoas minor
muscles) and the inner pelvis (iliacus muscle) and inserts into the lesser trochanter on the femur.
The psoas minor
is a long, slender skeletal muscle which, when present, is located anterior to the psoas major muscle.
INTRODUCTION: Psoas minor is a slender muscle of posterior abdominal wall, having short fleshy belly and long tendon, lying anterior to Psoas major muscle.
OBSERVATIONS: In the present study, Psoas minor muscle was present in 40% (8/20 cases) cadavers studied: Bilateral in 35% (7/20 cases); & Unilateral in 5% (1/20 cases).
Psoas accessorius muscle was originating from the deep surface of left Psoas minor tendon to spread out as fleshy mass on anterior surface of Psoas major muscle (Fig.
1988) (9), as reported by Guerra (8), stated that insertion of Psoas minor muscle is by a thin tendon into the iliopectineal eminence, arcuate line, the iliac fascia & pectineal ligament.
The psoas muscle is comprised of both the psoas major and minor, but as the psoas minor is often absent in individuals, (3) this paper will focus on the psoas major.
40) The psoas major muscle is intimately linked with the iliacus, psoas minor (if present), adductor group, and quadriceps muscles (rectus femoris in particular as it also aids with hip flexion), thus evaluation of these muscles for strength, flexibility, and palpating for tonicity and tenderness is necessary to aid management decisions.
The psoas major, psoas minor and the iliacus muscles combine to become the iliopsoas.
It also has an intimate connection with the medial and lateral arcuate ligaments which lie around the top of the psoas minor and psoas major respectively.
The kidneys lay each side of psoas major and psoas minor.
The aorta was found along with the ventral surface of lumbar and sacral vertebrae, dorsally to the colon, following the caudal vena cava to the right, with the Psoas major, Psoas minor
and Quadratus lumborum.