L4 (T2): Anatomy of the pelvic region

ProlificSynergy avatar
ProlificSynergy
·

Start Quiz

Study Flashcards

46 Questions

What are the primary joints of the pelvis?

Sacro-iliac joints and pubic symphysis

Which bones compose the pelvis?

Ilium, ischium, pubis, sacrum, coccyx

What forms the sacrum?

Fusion of the 5 sacral vertebrae

What forms the coccyx?

Fusion of the 4 coccygeal vertebrae

How many hip bones make up the pelvis?

Two innominate (hip) bone that form from 3 bones: ilium, ischium and pubis

What is the function of the pubic symphysis?

It transfers weight from the axial skeleton to the ilia via ligaments to the femurs during standing

What is the composition of the ischial tuberosities?

They are weight-bearing structures during sitting

Which structures define the lesser and greater pelvis spaces?

Structures/landmarks

What are the boundaries of the lesser and greater pelvis?

Structures/landmarks

Which structures compose the pelvic wall and floor?

Muscles

What are the main vessels plus nerves intrinsic to the pelvis?

Innervation (somatic and autonomic)

How is weight transferred during sitting in the pelvis?

To the ischial tuberosities

What forms the bony edge defining the pelvic inlet?

Promontory and ala of sacrum

Which muscle rotates the thigh laterally and abducts the thigh?

Piriformis

What is the function of the pelvic diaphragm?

To support the pelvic viscera

What defines the perineal body?

The convergence of several sphincter and perineal pouch muscles

What artery is the main artery in the pelvis?

Internal iliac artery

What ligament is posterior to the sacrospinous ligament?

Sacrotuberous ligament

What defines the pelvic outlet?

Pubic arch anteriorly, ischial tuberosities laterally, coccyx posteriorly

What is the space bounded by the bony, ligamentous, and muscular pelvic walls and floor?

Pelvic cavity

What muscle forms the lateral pelvic walls?

Right and left hip bones

What forms the bony edge defining the pelvic outlet?

Pubic arch, ischial tuberosities, coccyx

What is the function of the obturator internus muscle?

Rotates the thigh laterally

What is the shape of the pelvic inlet?

Heart-shaped

What structures form part of the pelvic inlet?

Sacral promontory, margin of the sacrum

What is the impact of uneven weight distribution on the pelvis?

Blowout fracture

Which articulation is involved in weight transfer through the pelvis?

Sacroiliac joint

What defines the pelvic inlet/pelvic brim?

Start of the true pelvis

Where is the obturator foramen located?

Between ilium, ECM, and pubis

What is the function of the pelvic articulation for weight transfer?

Facilitates weight transfer

Which structure is formed by the fusion of the ilium, ischium, and pubis, and attaches to the femur?

Acetabulum

At what age is the fusion of bones in the pelvis generally completed?

30

Which structure bears most of the body weight when sitting down?

Ischial tuberosity

Which structure is important for administering an epidural block during childbirth?

Ischial spine

What is the main function of the ischial spine?

Attachment site for muscles and ligaments

Which structure is formed by the fusion of the ilium, ischium, pubis, sacrum, and coccyx?

Hip bone

Which structures form the greater and lesser sciatic foramen?

Sacrotuberous and sacrospinous ligaments

What is the main distinction between the true and false pelvis?

Presence of urogenital and reproductive structures

What influences the geometry of the pelvis, especially before puberty?

Hormone therapy

What is the significance of the greater and lesser sciatic foramen in the pelvis?

Important structures often covered by the obturator membrane

Which structures form the pelvic inlet?

Sacral promontory, wing of the sacrum, accurate line of the ilium, back to it line of the pubic bone, pubic crest, and symphysis

Which ligament stabilizes the joint between the sacrum and ilium?

Sacroiliac ligament

What forms the pelvic outlet?

Coccyx, sacral tuberous ligament, pubic arch, and part of the pubic symphysis

Which ligament stabilizes the joint between the sacrum and ischial spine?

Sacrospinous ligament

What is the function of the pelvic girdle's articulation?

Crucial for weight transfer and energy resistance

What divides the space into two foramina, through which structures can pass?

Sacrospinous and sacrotuberous ligaments

Study Notes

Anatomy of Pelvic Inlet and Outlet

  • The red line is the accurate line, the bony boundary of the ilium.
  • The blue line is the back to it line, associated with the superior ramus of the pubic bone.
  • The pelvic inlet is formed by the sacral promontory, wing of the sacrum, accurate line of the ilium, back to it line of the pubic bone, and the pubic crest and symphysis.
  • The pelvic outlet is formed by the coccyx, sacral tuberous ligament, pubic arch, and part of the pubic symphysis.
  • The pelvic girdle's articulation is crucial for weight transfer and energy resistance.
  • Three important ligaments are sacroiliac, sacrospinous, and sacrotuberous, stabilizing the pelvic girdle.
  • The sacroiliac ligament stabilizes the joint between the sacrum and ilium.
  • The sacrospinous ligament stabilizes the joint between the sacrum and ischial spine.
  • The sacrotuberous ligament stabilizes the joint between the sacrum and ischial tuberosity.
  • The sacroiliac, sacrospinous, and sacrotuberous ligaments ensure pelvic girdle stability.
  • The sacrospinous and sacrotuberous ligaments divide the space into two foramina, through which structures can pass.
  • The foramina are openings through which different structures can pass.

Test your knowledge of the anatomy of the pelvic region with this quiz. Explore the structures, bones, muscles, and landmarks that define the pelvis and its spaces. Assess your understanding of the pelvic floor and key vesicles.

Make Your Own Quizzes and Flashcards

Convert your notes into interactive study material.

Get started for free

More Quizzes Like This

Use Quizgecko on...
Browser
Browser