Lesser sciatic notch

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Bone: Lesser sciatic notch
Right hip bone, external surface, showing greater sciatic notch and lesser sciatic notch, separated by the spine of ischium.
Latin	incisura ischiadica minor
Gray's	subject #57 235
Dorlands / Elsevier	i_05/12447360

Below the ischial spine 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, by the sacrotuberous and sacrospinous ligaments, and transmits the tendon of the Obturator internus, the nerve which supplies that muscle, and the internal pudendal vessels and nerve.

[edit] See also

• Lesser sciatic foramen
• Greater sciatic notch

[edit] External links

• SUNY Labs 42:os-0112 - The Male Perineum and the Penis: Osteology"
• SUNY Labs 44:st-0726 - "The Male Pelvis: Hip Bone"

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e Bones of pelvis/pelvic cavity General sacrum, coccyx, hip bone Ilium Body (Arcuate line) Wing: gluteal lines (Posterior, Anterior, Inferior) - Fossa - iliac spines (Anterior superior, Anterior inferior, Posterior superior, Posterior inferior) - Crest - Tuberosity Ischium Body (Ischial spine, Lesser sciatic notch) - Superior ramus (Tuberosity of the ischium) - Inferior ramus Pubis Body - Superior ramus (Pubic tubercle, Pubic crest, Obturator crest) - Inferior ramus (Pectineal line) Compound Acetabulum (Acetabular notch) - Iliopubic eminence/Iliopectineal line - Linea terminalis - Ischiopubic ramus/Pubic arch Obturator foramen - Greater sciatic foramen/Greater sciatic notch - Lesser sciatic foramen Lesser pelvis (Pelvic inlet, Pelvic brim, Pelvic outlet) - Greater pelvis