Lesser sciatic foramen
|Lesser sciatic foramen|
Articulations of pelvis. Anterior view.
Articulations of pelvis. Posterior view.
|Latin||Foramen ischiadicum minus|
An opening between the pelvis and the posterior thigh, the foramen is formed by the sacrotuberous ligament which runs between the sacrum and the ischial tuberosity and the sacrospinous ligament which runs between the sacrum and the ischial spine.
The lesser sciatic foramen has the following boundaries:
- Anterior: the tuberosity of the ischium
- Superior: the spine of the ischium and sacrospinous ligament
- Posterior: the sacrotuberous ligament
Alternatively, the foramen can be defined by the boundaries of the lesser sciatic notch and the two ligaments.
It transmits the following structures:
- the tendon of the Obturator internus
- internal pudendal vessels
- pudendal nerve
- nerve to the obturator internus
- Anatomy photo:41:os-0111 at the SUNY Downstate Medical Center - "The Female Perineum: Osteology"
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