Pelvic Girdle Anatomy

The complete pelvis serves as the base of the trunk and forms the connection between the vertebral column and lower limbs.

True

What 4 bones does the pelvis consist of?

• 2 hip bones (innominate bones)

• 1 sacrum

• 1 coccyx

What are the 3 divisions of the hip bone?

• Ilium: The largest and uppermost part of the hip bone.

• Ischium: The lower and back part of the hip bone.

• Pubis: The anterior and front part of the hip bone.:

What is the deep, cup-shaped cavity that accepts the head of the humerus to form the hip joint?

Acetabulum

What is the ilium composed of?

A body ( inferior portion) and an ala (wing)

What is the superior margin of the ala (wing) that extends from the ASIS to the PSIS & is known as the uppermost peak crest?

Crest of the ilium (iliac crest)

What is located below the anterior superior iliac spine (ASIS)?

Anterior inferior iliac spine

What are 2 important positioning landmarks of the ilium?

The iliac crest and the ASIS

What is the most frequently used landmark for the pelvis?

ASIS

• Checks rotation

Male or Female pelvis:

• Pelvis inet is wider, more shallow, and rounder (gynecoid or platypelloid)

• Angle of pubic arch is wider (80-85 angle)

• Ischial spines are less protrusion into pelvic inet

Female pelvis

Male or Female pelvis?

• Pelvis inet is narrow, deeper, oval/heart-shaped. (arthropoid)

• Pubic arch is narrower (50-60 degrees)

• Ischial spines is more protusion into pelvic inet

Male pelvis

The baby’s head first travels through the pelvic inet, then midcavity, and then the outlet.

True

Which bony landmark is found on the most inferior aspect of the posterior pelvis?

Ischial tuberosity

What is the name of the joint found between the superior rami of the pubic bones?

Symphysis pubis

Which of the bones of the pelvic girdle is the largest?

Ilium

Which of the following bony landmarks is located posterior to the acetabulum?

The pelvic arch of the male pelvis forms an acute angle (<90*). (true/false)

True