Obturator membrane

Study entry

Classification

Fibrous membrane belonging to the hip bone itself (it does not join two bones).

Surfaces

Fills almost all of the obturator foramen of the hip bone; leaves the obturator canal free at the top.

Capsule

Made of strong, interlaced fibers. [CHECK: not in the passage read] The obturator internus (inside the pelvis) and obturator externus (outside) muscles arise from it and from the margin of the foramen.

Movements

It has no movement of its own.

Blood supply

Not applicable (membrane); the obturator artery passes through the obturator canal, above it.

Innervation

Not applicable (membrane); the obturator nerve leaves the pelvis through the obturator canal, above it.

Source: cap. 6, «Paredes de la cavidad pélvica» (fig. 6-9 B) e «Nervio obturador»

Other structures in this region

• Interosseous membrane of leg
• Distal intertarsal joints (cuneonavicular, cuboideonavicular, intercuneiform and cuneocuboid)
• Triradiate cartilage of the acetabulum
• Hip joint
• Knee joint
• Superior tibiofibular joint
• Tibiofibular syndesmosis (inferior tibiofibular joint)
• Talocrural (ankle) joint