Below the ischial spine

Ischial spine

From the posterior border of the body of the Ischium there extends backward a thin and pointed triangular eminence, the ischial spine, more or less elongated in different subjects.It can serve as a landmark in pudendal anesthesia.-Surfaces:...

 is a smaller notch, the lesser sciatic notch; it is smooth, coated in the recent state with cartilage, the surface of which presents two or three ridges corresponding to the subdivisions of the tendon of the Obturator internus, which winds over it.

It is converted into a foramen, the lesser sciatic foramen

Lesser sciatic foramen

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.-Boundaries:...

, by the sacrotuberous and sacrospinous ligament

Sacrospinous ligament

-External links: - "Posterior view of the bones and ligaments of the hip joint."*...

s, and transmits the tendon

Tendon

A tendon is a tough band of fibrous connective tissue that usually connects muscle to bone and is capable of withstanding tension. Tendons are similar to ligaments and fasciae as they are all made of collagen except that ligaments join one bone to another bone, and fasciae connect muscles to other...

 of the Obturator internus, the nerve which supplies that muscle, and the internal pudendal

Internal pudendal

Internal pudendal can refer to:* Internal pudendal artery* Internal pudendal veins...

vessels and nerve.

External links

- The Male Perineum and the Penis: Osteology" - "The Male Pelvis: Hip Bone"