Unit 3-Pelvis Flashcards
What makes up the bony pelvis?
Sacrum, Coccyx, and Os Coxae (fusion of 3 bones)
What is the division of the abdominal and pelvic cavity?
The sacral prominatory
What makes up the lateral mass (ala)?
The transverse processes of the 5 sacral segments
T/F
Lateral masses articulate with Ilium at SI joint
True
What modailty shows the sacral nerves?
MRI
How many segments of the coccyx are there?
Consists of three to five small fused bony segments.
(dont need to label each segment by its number, just label coccyx)
What makes up the Os Coxae?
lium, Ischium and Pubis (anterior)
What is the concave, anterior surface of the ala called?
Iliac fossa
What is the largest and most superior part of the Os Coxae?
The Ilium
T/F
The superior iliac spines are on both the anterior and posterior part of the iliac crest
True
What is the upper portion of the acetabulum composed of?
Upper portion of the acetabulum is made of body of ileum
What forms the lower anterior portion of the acetabulum?
The pubis
What makes up the pubis?
Body + superior & inferior pubic rami
What makes up the pubic symphysis?
The body of the two pubic bones (R & L) meeting at the midline
T/F
The superior pubic ramus projects inferiorly and laterally from the acetabulum to the midsagittal plane.
False; The superior pubic ramus projects inferiorly and medially from the acetabulum to the midsagittal plane.
In what direction does the inferior pubic ramus travel to meet with the join the ischium? What is this union called?
The inferior pubic ramus projects inferiorly and laterally. Union called ischiopubic ramus.
What forms the lower posterior portion of the acetabulum?
Body of the ischium
What makes up the ischium?
Body + 2 rami
Which way does the superior ischial ramus extend towards the ischial tuberosity?
Posteriorly and inferiorly
What does the Inferior ischial ramus join with?
Inferior pubic ramus
What direction does the Inferior ischial ramus extend to join with the inferior pubic ramus?
Anteriorly and medially
What forms the obturator foramen?
The union of the pubic rami and ischium
T/F
If you see superior pubic ramus, you are at the level of the ischial spine
True
T/F
When we see pubic ramus, we see part of the body projecting backwards to see the ischial spine
True
What anatomy is this describing?
Extends from the posterior inferior iliac spine to the ischial spine.
Greater sciatic notch
What anatomy is this describing?
Extends from the ischial spine to the ischial tuberosity.
Lesser sciatic notch
How does the pubic symph and ischial tuberosity connect?
By the inferior pubic ramus and inferior ischial ramus
Where is the rectus abdominus muscle located in relation to the abdomen and the pelvis?
Anterior surface of the abdomen and pelvis
What is the origin of the rectus abdominus muscle?
Symphysis pubis
What is the insertion of the rectus abdominus muscle?
Xiphoid process.
What is the origin of the PSOAS muscle?
lateral surfaces of the lumbar vertebrae
What is the insertion of the PSOAS muscle?
lesser trochanter of the femur
What do the external and internal oblique muscles run between?
Run between the cartilages of the lower ribs and the iliac crest
What forms the inguinal ligament?
A band of fibrous connective tissue from the external oblique muscle folds back on itself