The obturator externus
bursa is a potential space located between the obturator externus
tendon and the ischiofemoral capsular ligaments at the posterior aspect of the hip joint capsule.
Gross anatomy observation: The trunk of the obturator nerve passes through the obturator externus
muscle about 3 cm inferiolaterally to the pubic tubercle and divides into anterior and posterior branches, both of which travel superficial (anterior branch) and deep (posterior branch) to the adductor brevis muscle.
The anterior and posterior branches of the obturator nerve, or the common obturator nerve, run between the pectineus and obturator externus
muscles immediately after the nerve emerges from the obturator canal (Figure 1(a)).
We present a previously unreported case of acute obturator internus and Obturator externus
strain in an adolescent.
It passes through the following structures in the following order: gracilis, adductor brevis muscle, obturator externus
muscle, obturator membrane, and beneath or through the obturator internus muscle and periurethral endopelvic connective tissue; it finally exits through the opened vagina.
Once placed, the ends of the mesh penetrate the obturator membrane and obturator externus
but not the adductor compartment of the thigh and groin.
Quadratus femoris (QF), piriformis, obturator internus, obturator externus
, and superior and inferior gemelli are the deep external rotator muscles of the hip joint (Fig).
There was herniation of a bowel loop of length 3.5 cm through left obturator foramen extending inferiorly between pectineus muscle anteriorly and obturator externus
muscle posteriorly, suggestive of obturator hernia (Figures 3, 4(a), and 4(b)).
After preparation of the space between the anteroinferior capsule and the psoas tendon, the ischium is approached proximal to the obturator externus
The fascia from the obturator externus
and adductor magnus muscles was removed without damaging the branches of the obturator nerve.
The gluteals (maximus, medius, and minimus) and the "deep six" muscles of the hip (piriformis, quadratus femoris, obturator internus, obturator externus
, gemellus superior, and gemellus inferior) serve to flex, extend, abduct, adduct, and medially or laterally rotate the hip.
The gemelli muscles, together with piriformis, obturator internus, obturator externus
and quadratus femoris, are deep muscles of the hip joint.