Examination of Areas in the Pelvis Where the Internal Abdominal Oblique Muscles Are Superficially Located

Abstract

[Purpose] This study investigated the superficial location of the internal abdominal oblique muscles with muscle fibers in the pelvis in Japanese individuals. [Participants and Methods] Ultrasound images of the anterior surfaces of the bilateral pelvic and hip joints of 11 healthy adult male subjects were obtained to identify areas where the internal oblique muscle are superficially located. [Results] In all subjects, the internal oblique muscle was visualized on the surface 0 cm below (A0, B0) and 1–4 cm medial, 1 cm below (A1, B1) and 2–5 cm medial, 2 cm below (A2, B2) and 3–5 cm medial, 3 cm below (A3, B3) and 4–6 cm medial to the anterior superior iliac spine (ASIS). [Conclusion] The location of the internal oblique abdominal muscle on the superficial layer of the muscle revealed in this study is considered to be an appropriate electrode attachment position for surface electromyography measurement.