Lesser sciatic foramen

The lesser sciatic foramen is an opening (foramen) between the pelvis and the back of the 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.

Lesser sciatic foramen
Image of the pelvis showing the lesser sciatic foramen.
LatinForamen ischiadicum minus
Anatomical terminology


The lesser sciatic foramen has the following boundaries:

Alternatively, the foramen can be defined by the boundaries of the lesser sciatic notch and the two ligaments.


Pudendal nerve and its course through the lesser sciatic foramen.

The following pass through the foramen:

See also


This article incorporates text in the public domain from page 309 of the 20th edition of Gray's Anatomy (1918)

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