Hip bone: Ischium

Hip bone #3: Ischium. Anatomy & FunctionKey facts about the anatomy of the ischium
~ 3 min

We have discussed general information about the structure of the hip bone as well as peculiarities of the structure of the iliac bone and pubic bone in the previous PDF notes.

Let us examine the structure of the ischium (os ischii). It has two large parts:

Ischium (os ischii)
Ischium (os ischii)
  • body of the ischium (corpus ossis ischii)

Body of the ischium (corpus ossis ischii)
Body of the ischium (corpus ossis ischii)
  • ramus of the ischium (ramus ossis ischii)

Ramus of the ischium (ramus ossis ischii)
Ramus of the ischium (ramus ossis ischii)

At the point of transition of one part to the other a thickening is formed — the ischial tuberosity (tuber ischiadicum).

Ischial tuberosity (tuber ischiadicum)
Ischial tuberosity (tuber ischiadicum)

From this tuberosity extends the ischial spine (spina ischiadica), which is the divider between the two notches.

Ischial spine (spina ischiadica)
Ischial spine (spina ischiadica)

These are the greater sciatic notch (incisura ischiadica major) and the lesser sciatic notch (incisura ischiadica minor).

Greater sciatic notch (incisura ischiadica major)
Greater sciatic notch (incisura ischiadica major)
Lesser sciatic notch (incisura ischiadica minor)
Lesser sciatic notch (incisura ischiadica minor)

Connecting together, the ischium and the pubis form the obturator foramen (foramen obturatum).

Obturator foramen (foramen obturatum)
Obturator foramen (foramen obturatum)
Dictionary

Ischium

ischium
os ischii
body of ischium
corpus ossis ischii
ramus
ramus ossis ischii
ischial tuberosity
tuber ischiadicum
ischial spine
spina ischiadica
greater sciatic notch
incisura ischiadica major
lesser sciatic notch
incisura ischiadica minor
obturator foramen
foramen obturatum
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