10 Questions
What is the function of the pelvis?
To serve as a common attachment point for muscles
What is the union of three bones that form the innominate?
Ilium, pubis, and ischium
What is the angle called when the femoral neck and shaft are angled forward?
Anteversion
Where do the innominates connect posteriorly?
At the sacrum
What is the normal angle between the femoral neck and shaft in the transverse plane?
15°
What is the purpose of the pubic symphysis?
To connect the two innominates anteriorly
What is the result of anterversion exceeding 15°?
Abnormal gait during walking
Which bones unite to form the innominate?
Ilium, pubis, and ischium
What is the primary function of the pelvis during sitting?
To transfer weight to the ischial tuberosities
In which plane is the angle between the femoral neck and shaft normally 15°?
Transverse plane
Study Notes
Pelvis
- Each innominate (pelvic bone) is formed by the union of three bones: ilium, pubis, and ischium.
- The innominate bones connect at the pubic symphysis (anteriorly) and the sacrum (posteriorly) at the SI joint.
Function of the Pelvis
- The pelvis serves as a common attachment point for various muscles.
- It transmits the weight of the upper body and trunk to the:
- Ischial tuberosities during sitting.
- Lower extremities during standing and walking.
- The pelvis supports organs involved in:
- Bowel functions.
- Bladder functions.
- Reproductive functions.
Femoral Shaft and Neck Angles
- The angle between the femoral neck and shaft in the frontal plane is:
- Normal: around 15°.
- Anteversion: more than 15°.
- Retroversion: less than 15°.
- The angles are described in relation to the anterior and posterior positions.
Pelvis
- Each innominate (hip bone) is formed by the union of three bones: ilium, pubis, and ischium.
- Innominate bones connect anteriorly at the pubic symphysis and posteriorly at the sacrum (SI joint).
Function of the Pelvis
- Serves as a common attachment point for muscles.
- Transmits the weight of the upper body and trunk to the ischial tuberosities during sitting or to the lower extremities during standing and walking.
- Supports the organs involved with bowel, bladder, and reproductive functions.
Angle between Femoral Neck and Shaft
- In the frontal plane, the normal angle is approximately 15°.
- Anteversion occurs when the angle is greater than 15°.
- Retroversion occurs when the angle is less than 15°.
Learn about the structure and function of the pelvis, including the innominate bones and their connections, as well as the role of the pelvis in supporting the body.
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