Anatomy of the Pelvis Flashcards
What is the acetabelum?
depression where femur attaches to pelvis
Where is the pelvis located?
between the abdomen and lower limbs -> forming the lower portion of the trunk
Pelvis: Functions (4):
- strong stable connection between
trunk and lower extremities - bears and transmits weight from
the upper body - contains, supports, protects pelvic
viscera - attachment for trunk and lower
limb muscles
Where is the body’s centre of gravity?
pelvis
curvatures in the vertebral column center the weight in the upper body and transmits it through the pelvis to the femora
Which view?
Lateral view becuase acetabelum
Three divisions of the Innominiate Bone:
- ilium
- ischium = posterior
- pubis = anterior
three divisions fuse together in the acetebulum
bones are connected by a triradiate cartilage at a cup-shaped socket forming the acetabulum
fusion into a single bone begins at puberty
Which bones contribute to the pelvic girdle?
- sacrum
- coccyx
- right and left innominate bone
Pelvis: Bony Landmarks:
add promontery
Identify the Bony Landmarks:
- anterior superior iliac spine
- pubic tubercule (left)
- posterior superior iliac spine
- ischial spine
- ischia tuberosity
- inferior pubic ramus
Identify the Bony Landmarks:
insert slide
Where is the obturator foramen?
insert diagram
Which views of the sacrum?
foramina = anterior/posterior vertebral foramina
Bony Landmarks:
insert diagram
**L5, promontery, sacrum, coccyx
Identify the bony landmarks and the ligaments:
- notch when not covered by
ligaments - foramen when covered by
ligaments
Sacrospinous Ligament:
- location
- runs between
- posteriorly and medially located
- runs between the sacrum to the
ischial spine
Sacrotuberous Ligament:
- Location
- Runs between
- covers
- posteriorly and medially located
- runs between the sacrum and the
ischial tuberosity - covers the lesser sciatic foramen
Function of the sacrospinous and sacrotuberous ligaments:
- weight is transferred from the
vertebral column to the sacrum - results in tilting the sacrum
forward/anteriorly - the ligaments prevent the lower
portion of the sacrum form being
rotated upwards at the sacroiliac
joint
Joints of the Pelvic Girdle:
insert diagram
What are the four articulating bones of the pelvic girdle?
- right innominate
- left innominate
- sacrum
- coccyx
What are the five joints of the pelvic girdle?
- lumbrosacral
- right sacroiliac
- left sacroliliac
- pubic symphysis
- sacrococcygeal symphysis