Anatomy of the Pelvis

Question 1

What makes up the bony pelvis?

Answer 1

2 hip bones, sacrum and coccyx

Question 2

What joints are involved?

Answer 2

3 type, 4 overall

Question 3

What joint is between the ilium of the hip and the sacrum?

Answer 3

Sacroiliac joint

Question 4

Joint between the sacrum and the coccyx

Answer 4

Sacrococcygeal joint

Question 5

Between the 2 pubis of the bodies of the hip joint

Answer 5

Pubic symphysis

Question 6

Where is the pelvic inlet located?

Answer 6

Between the greater and lesser pelvis

Question 7

What are the edges of the pelvic inlet called?

Answer 7

Pelvic brim

Question 8

Posterior border of the pelvic inlet?

Answer 8

Sacral promontory (upper sacrum) + sacral wings (ala)

Question 9

Lateral border of the pelvic inlet?

Answer 9

Arcuate line on the inner surface of the ilium + pectineal line on superior pubic ramus

Question 10

Anterior border of the pelvic inlet?

Answer 10

Pubic symphysis

Question 11

Where is the pelvic outlet located?

Answer 11

End of the lesser pelvis

Question 12

Posterior border of the pelvic outlet?

Answer 12

Coccyx (tip of)

Question 13

Lateral border of the pelvic outlet?

Answer 13

Ischial tuberosity and the sacrotuberous ligament

Question 14

Anterior border of the pelvic outlet?

Answer 14

Pubic arch (sub pubic angle (larger in women))

Question 15

Key features of a gynacoid pelvis?

Answer 15

Less prominent ischial spines, wider and broader outlet, oval shaped (greater bispinous diameter, less pronounced sacral promontory

Question 16

Which spinal nerves form the basis of the sacral plexus?

Answer 16

S1 - S4 (anterior rami) + lumbar spinal nerves L4 and L5

Question 17

The nerves descend down what?

Answer 17

Posterior pelvic wall

Question 18

The nerves of the sacral plexus have two main destinations?

Answer 18

Leave pelvis via greater sciatic foramen + stay and innervate pelvis and perineum and pelvic organs

Question 19

What nerves leaves the pelvis via the greater sciatic foramen?

Answer 19

Superior gluteal nerve, inferior gluteal nerve and the pudendal nerve, posterior femoral cutaneous

Question 20

Motor Functions of the pudendal nerve?

Answer 20

innervates skeletal muscles of the perineum, external urethral sphincter, external anal sphincter, and levator ani

Question 21

Sensory functions of the pudendal nerve?

Answer 21

Penis and clitoris and skin of the perineum

Question 22

What separates the pelvic cavity from the perineum?

Answer 22

pelvic floor