Joints of the pelvis and hip

Question 1

Anterior sacroiliac ligament

Answer 1

Attachments:
-Anterior aspect of the ilium to the sacrum

Function:
-Secures/stabilizes sacrum and pelvis

Question 2

Posterior sacroiliac joint

Answer 2

Attachments:
-Posterior aspect of the sacrum to the edge of ilium between PSIS and PIIS

Function:
-Secures/stabilizes sacrum and pelvis

Question 3

Ilio-lumbar ligament

Answer 3

Attachments:
-transverse process of 5th lumbar vertebrae to iliac crest - blends in with anterior sacroiliac joint

Function:
-Stabilizes the base of the vertebral column at L5 with the pelvis

Question 4

Inguinal ligament

Answer 4

Attachments:
-ASIS to to pubic tubercle

Actions:
-Attachment site for some of the abdominal muscles
-Protects femoral artery, vein and nerves as they pass through into the thigh

Question 5

Sacrotuberous ligament

Answer 5

Attachments:
-sacrum, coccyx and posterior aspect of the ilium to ischial tuberosity

Function:
-Transforms the sciatic notch into the large sciatic foramen
-Attachment site for pelvic muscles

Question 6

Sacrospinous ligament

Answer 6

Attachments:
-Sacrum and coccyx to ischial spine

Function:
-Subdivides the sciatic foramen into greater and lesser sciatic foramen

-Sacrospinous and sacrotuberous ligaments help counterbalance rotation of sacroiliac joints

Question 7

Iliofemoral ligament

Answer 7

Attachment:
-AIIS and acetabular rim to intertrochanteric line

Functions:
-Helps stabilize the femoral head, limits lateral rotation and prevents hyperextension

Question 8

Pubofemoral ligament

Answer 8

Attachments:
-Obturator crest of pubic bone to iliofemoral ligament and capsule

Functions:
-Helps stabilize hips, prevents hyperextension, lateral rotation and excessive abduction*

Question 9

Ischiofemoral ligament

Answer 9

Attachments:
-Ischial part of acetabular rim to neck of femur

Functions:
-Prevents hyperextension*, stabilizes the hip joint and restricts medial rotation

Question 10

Traverse ligament

Answer 10

Attachments:
-Bridges the acetabular notch

Functions:
-Closes off the acetabular notch and blending in with the labrum, helps to stabilize the joint