A Macroscopic Anatomical Study of the Positional Relationship between the Acetabular Labrum and Iliopsoas Muscle

Abstract

[Purpose] To investigate the positional relationship and morphological characteristics of the acetabular labrum and the iliopsoas muscle by gross anatomy. [Participants and Methods] Twelve joints of 6 anatomical research and teaching cadavers (3 males and 3 females, mean age 87.2 ± 7.9 years) were used to measure the ventral and dorsal sides of the psoas major and iliac muscles, and the proportions of muscle and tendon were calculated. [Results] With respect to a total vertical length of 74.1 ± 6.6 mm, on the ventral side, the iliopsoas muscle was 74.1 ± 6.6 mm, the psoas major muscle was 34.3 ± 19.1 mm, and the psoas major muscle tendon was 39.8 ± 21.2 mm, while on the dorsal side it was 74.1 ± 6.6 mm. With respect to a total width of 38.6 ± 5.8 mm, on the ventral side, the iliacus muscle was 26.7 ± 5.2 mm and the psoas major muscle was 10.6 ± 3.7 mm, while on the dorsal side the psoas major muscle tendon was 16.8 ± 5.5 mm and the iliacus tendon was 8.8 ± 6.1 mm. [Conclusion] Most of the dorsal side of the iliopsoas muscle, which contacts the acetabular labrum, consisted of the psoas tendon.