[Plate 377, Pelvic Scans: Sagittal MR Images]Functions of the Pelvic Girdle
Site of attachment of axial skeleton and lower limbs
Transmits weight of upper limbs, head, neck and trunk to lower limb
Involved in balance
Protects and contains pelvic viscera (distal ureters, bladder, rectum, sigmoid colon, reproductive organs)Key Landmarks
Anterior superior iliac spine (ASIS)
Site of lateral attachment of inguinal ligament
Site of attachment of sartorius and tensor fascia lata muscles
Pubic tubercle
Medial point of attachment of inguinal ligament
Pubic symphysis
Secondary cartilaginous joint
Location of T12 dermatome along its superior margin
Midpoint between pubic tubercle and ASIS marks the site for palpating the femoral artery and vein (the midinguinal point)
Iliac crest
Follows a curve between the anterior and posterior superior iliac spines
Highest point is at approximately the level of the umbilicus-level of L4 vertebral body
Supracristal plane passes between the highest points of the iliac crests
Intergluteal or natal cleft
The cleft between the buttocks
Site of pilonidal sinus and abscess formation