Pelvic Girdle Flashcards
List the functions of the pelvic girdle.
- Weight bearing
- Transfer weight from axial to lower appendicular skeleton
- Attachment point for many muscles
- Protects abdominal organs
What is the name of the complete fused hip bone?
Innominate Bone
Which three bones fuse to form the innominate bone?
Ilium, Ischium, Pubis
What are the 2 bones that form the pelvic girdle?
Innominate Bone and Sacrum
Pubic Symphysis is what type of joint?
Cartilaginous (anterior)
What joints of the pelvic girdle are synovial?
Sacroiliac joints (posterior)
Where does the fusion of the innominate bone occur? What does it begin as?
At the acetabulum, begins as triadiate cartilage.
What structure is the “sit bones”?
Ischial Tuberosities of the innominate bone
Which Iliac Spine cannot be palpated?
Posterior Inferior Iliac Spine
What comprises the pubic arch?
The angle that is formed by the 2 innominate bones is known as the pubic arch.
What are the 3 distinct markings that can be identified on the later aspect of the ilium?
- Inferior Gluteal Line
- Anterior Gluteal Line
- Posterior Gluteal Line
What are the gluteal lines important for?
They are important landmarks for describing the muscles attachments for the gluteal muscles.
What passes the obturator foramen?
It is a passage way for nerves and blood vessels.
What view can the acetabulum be viewed at?
Anteriorly only.
At which view must the gluteal lines be viewed?
An external view.
What closes in the acetabular notch of the acetabulum?
Transverse acetabular ligament
What structure articulates with the head of the femur?
Lunate surface of the acetabulum.
Where is the lesser/true pelvis located and what does it contain?
Inferior to the iliopectineal line and houses the reproductive organs.
What pelvis portion protects the bladder and some digestive system organs?
Greater/False Pelvis which is superior to the iliopectineal line.
Functionally, what is the pubic Symphysis joint?
Ampiarthrosis
What special type of rotation does the sacro-iliac joint allow for?
Nutation.
Of the 3 sacro-iliac ligaments which is the strongest?
Interosseus
What are the 3 ligaments that support the sacro-iliac ligaments?
- Anterior
- Interosseus
- Posterior
Where does the Iliolumbar ligament run to and from?
The crest of the ilium to the transverse process of L5
Which ligament is often involved in low back pain?
Iliolumbar ligament
What is the function of the sacrotuberous ligament?
Closes the posterior aspect of the lesser sciatic notch to create a foramen.
Which ligament runs from the inferior sacrum to the ischial tuberosity?
Sacrotuberous
Which ligament turns the greater sciatic notch into a foramen?
Sacrospinous ligament
Where does the Sacrospinous ligament run?
passes he lateral sacrum and coccyx to the ischial spine.
Why are the pelvic ligaments so important?
- Transmission of body weight
- Securing the sacroiliac joint during movement in other others of the body
Does males or females have a longer sacral shape?
Males
The width between the ischia Tuberosities are much narrower in which gender?
Females.
Compared to the female pelvis, the male pelvis has:
a) round pelvic inlet
b) wide pelvic outlet
c) long curved sacrum
d) wide pelvic arch
e) wide iliac blades
c) long curved sacrum
Which ligament runs between the sacrum and the ischial tuberosity?
a) Sacrospinous
b) sacrotuberous
c) Iliolumbar
d) sacroiliac
e) Iliofemoral
b) sacrotuberous ligament
