Week 2 - Pelvic Girdle Flashcards
Which is the largest component of the hip bone?
Ilium
Define hip pointer
Bruising of the anterior superior iliac spine + associated soft tissues.
What happens to the pubic symphysis in the later stages of pregnancy?
Hormone relaxin ⬆️ its flexibility to ease delivery.
Whats the movement of the pelvis rotation
Transverse plane rotation
What do the ilium spines serve as?
Attachment points for tendons of the trunk, muscles, hips + thighs.
Functions of the bony pelvis
Strong + stable support for vertebral column and pelvic + abdominal organs.
Connects bones of lower limbs to axial skeleton.
Define the pelvic brim
Forms the inlet into the pelvic cavity from the abdomen
Divides bony pelvis into superior + inferior portions.
What is the hip (coxal) joint formed by?
Acetabulum + femoral head.
Where does the pectineal line go in the pubis
Superiorly + laterally along superior ramus to purge w/ the arcuate line of the ilium.
Define the ischium
Inferior, posterior portion of the hip bone.
Define pelvic inlet
Superior opening of the true pelvis.
Define the iliac tuberosity
Attachment point for sacroiliac ligament + auricular surface, which articulates w/ the sacrum to form the sacroiliac joint.
Define the pelvic axis
Imaginary line
Curves through true pelvis:
From pelvic inlet to pelvic outlet.
What is the false pelvis bordered by laterally?
Upper portions of the hip bones
What is the false pelvis bordered by anteriorly?
Abdominal wall
Define the pelvic outlet
Inferior opening of the true pelvis.
Where is the pubic arch?
Inferior to the pubic symphysis.
What can be found posterior to the iliac fossa?
Iliac tuberosity
Where does the sciatic nerve (longest nerve in the body) pass through?
The greater sciatica notch.
Whats the largest foramen in the skeleton + what is it surrounded by?
Obturator foramen
Surrounded by ramus + pubis.
Define the ramus
Where ischium fuses w. pubis.
What is the pubic arch formed from?
Inferior rami of the 2 pubic bones.
What are the 3 arched lines on the lateral surface of the ilium?
Posterior gluteal line
Anterior gluteal line
Inferior gluteal line
Features of the ischium
Prominent ischial spine
Lesser sciatic notch below the spine
Rough + thickened ischial tuberosity
Define the pubic tubercle
Projection at the lateral end of the pubis.
Also the beginning of the pectineal line.
Define the true pelvis
Inferior to pelvic brim.
Has the inlet, outlet + a cavity bounded by the sacrum + coccyx posteriorly, interior portions of the ilium + the pubic bones anteriorly.
Whats the movement of the pelvis tilt
Frontal plane rotation
What does the medial surface of the ilium contain?
Iliac fossa
What is the false pelvis bordered by posteriorly?
Lumbar vertebrae
What does each of the 2 hip bones of a newborn consist of?
3 bones separated by cartilage:
- Superior ilium
- Inferior + anterior pubis
- Inferior + posterior ischium
What does the space enclosed by the false pelvis contain?
Superior portion of the urinary bladder when full.
Lower intestines
Uterus, ovaries + uterine tubes
Which part of the bony pelvis is the false pelvis?
Part superior to pelvic brim.
What does the true pelvis contain?
Rectum
Urinary bladder
Vagina
Cervix
Prostate
What is the iliac fossa?
Concavity where tendon of the iliac muscle attaches.
What are most of the structural differences between the pelves for?
Adaptations to the req. of pregnancy + child birth.
Describe the pelvic girdle
Hip bones unite ANTERIORLY at the pubic symphysis
POSTERIORLY w/ sacrum at sacroiliac joint
Define the acetabulum notch
Deep indentation on the inferior side of the acetabulum.
Forms a foramen through which bv + nerves pass + serve as attachment points for the ligaments of the femur.
What is the ilium composed of?
A superior ala + an inferior body
Define the pubis
Anterior + inferior part of the hip bone.
Compromised of the superior ramus, inferior ramus + a body.
What is the pelvic inlet bordered by?
Pelvic Brim.
Define the pubis symphysis
Joint between 2 pubes of the hip bones.
Consists of a disc of fibrocartilage.
By what age do the 3 bones in the 2 hip bones fuse together by?
23
What are the movements of the pelvis tilt
Sagittal plane rotation.
Posterior + Anterior tilt
