Hip Bone Flashcards

Study the hip bone's ilium, ischium, pubis, acetabulum, anatomical landmarks, muscle attachments, articulations, and clinical anatomy.

Card 1 of 30Question

What is the hip bone?

A large, irregular bone that forms one half of the pelvic girdle.

In This Section

1. What is the hip bone?

A large, irregular bone that forms one half of the pelvic girdle.

2. What are the three bones that fuse to form the adult hip bone?

The ilium, ischium, and pubis.

3. What is another anatomical name for the hip bone?

The os coxae, also called the innominate bone.

4. Where do the ilium, ischium, and pubis meet?

At the acetabulum.

5. What is the acetabulum?

A cup-shaped socket on the lateral hip bone that receives the femoral head.

6. Which part of the acetabulum is covered by articular cartilage?

The horseshoe-shaped lunate surface.

7. What is the acetabular fossa?

The nonarticular depression in the central portion of the acetabulum.

8. Which ligament bridges the acetabular notch?

The transverse acetabular ligament.

9. What is the largest of the three components of the hip bone?

The ilium.

10. What are the two principal parts of the ilium?

The body and the ala, or wing.

11. What is the iliac crest?

The thickened superior border of the ilium extending between its anterior and posterior superior iliac spines.

12. Which muscle originates from the anterior superior iliac spine?

The sartorius muscle.

13. Which muscle originates from the anterior inferior iliac spine?

The straight head of the rectus femoris muscle.

14. What is the iliac fossa?

A broad, concave depression on the internal surface of the iliac wing.

15. Which muscle originates from the iliac fossa?

The iliacus muscle.

16. What are the three gluteal lines on the external surface of the ilium?

The posterior, anterior, and inferior gluteal lines.

17. Which muscle originates between the anterior and posterior gluteal lines?

The gluteus medius muscle.

18. Which part of the hip bone forms its posteroinferior region?

The ischium.

19. What is the ischial tuberosity?

A large roughened prominence on the inferior ischium that supports body weight during sitting.

20. Which major muscle group originates from the ischial tuberosity?

The hamstring muscles, except the short head of biceps femoris.

21. What is the ischial spine?

A pointed bony projection between the greater and lesser sciatic notches.

22. Which ligament attaches to the ischial spine?

The sacrospinous ligament.

23. Which part of the hip bone forms its anteroinferior region?

The pubis.

24. What are the three principal parts of the pubis?

The body, superior ramus, and inferior ramus.

25. What joint connects the right and left pubic bones anteriorly?

The pubic symphysis, a secondary cartilaginous joint.

26. What is the obturator foramen?

A large opening in the hip bone bounded by the pubis and ischium.

27. Which structures pass through the obturator canal?

The obturator nerve, artery, and vein.

28. What is the auricular surface of the ilium?

An ear-shaped articular surface that articulates with the sacrum at the sacroiliac joint.

29. What is the arcuate line of the ilium?

A curved ridge on the internal ilium that contributes to the pelvic brim.

30. What is the clinical significance of a fracture involving the acetabulum?

It can disrupt hip joint congruence and increase the risk of post-traumatic osteoarthritis.