Osteology and Muscles of the Urogenital and Pelvic Diaphragms

Question 1

The ___ (male or female) pelvis is thicker and heavier than the ___ (male or female) pelvis, which is thinner and lighter

Answer 1

male; female

Question 2

What is the shape of the interior space of the pelvis in males and females?

Answer 2

males: heart-shaped
females: oval

Question 3

What is the shape of the obturator foramen in males and females?

Answer 3

males: round
females: oval

Question 4

How do the subpubic arches in males and females compare?

Answer 4

males: narrow
females: wide

Question 5

True or false?

The acetabulum is larger in females and smaller in males

Answer 5

false; larger in males, smaller in females

Question 6

True or false?

The greater sciatic notch is a narrow inverted V in males and almost 90 degrees in females

Answer 6

true

Question 7

The android pelvis is more common in males or females?

Answer 7

males

Question 8

The __ pelvis is the “normal” female type

Answer 8

gynecoid

Question 9

The obturator internus is located from the internal surface of the ___ membrane and goes to the ____ _____

Answer 9

obturator; greater trochanter

Question 10

The performis is located from the internal surface of the ___ and goes to the ___ ___

Answer 10

sacrum; greater trochanter

Question 11

The surface area of the trunk between the thighs and the buttocks is called what?

Answer 11

perineum

Question 12

What two muscles make up the pelvic diaphragm?

Answer 12

coccygeus + levator ani

Question 13

The levator ani is made up of what three muscles

Answer 13

pubococcygeus; puborectalis; iliococcygeus

Question 14

This muscle attaches from the ischial spine to the inferior sacrum and coccyx, lies directly anterior to the sacrospinous ligament

Answer 14

coccygeus

Question 15

This muscle is a posterior tendinous arch to blend with anococcygeal ligament

Answer 15

iliococcygeus

Question 16

The ____ is found from the pubic ramus to coccyx and anococcygeal ligament

Answer 16

pubococcygeus

Question 17

The puborectalis forms a loop around what?

Answer 17

anus

Question 18

Some fibers of the puborectalis loop around and help support the ___ in females and ___ in males

Answer 18

vagina; prostate

Question 19

The tendinous arch of the levator ani muscles is derived from what fascia?

Answer 19

obturator internus

Question 20

This structure is a wedge-shaped area between skin and the inferior surface of the pelvic diaphragm and is usually filled with fat and loose CT

Answer 20

Ischioanal fossa

Question 21

What are boundaries of the ischioanal fossa?

Answer 21

lateral: ischium, obturator internus with fascia
medial: external anal sphincter with levator ani muscle
posterior: sacrotuberous ligament and edge of gluteus maximus
anterior: urogenital triangle and anterior recesses of the ischioanal fossa

Question 22

What artery, vein, and nerve are found in the pudendal canal?

Answer 22

internal pudendal artery and vein with pudendal nerve