Osteology and Muscles of the Urogenital and Pelvic Diaphragms

Question 1

Differences between male and female pelvis

Answer 1

• Acetabulum:
  
  • Larger in males
  • smaller in females
• Greater sciatic notch
  
  • narrow inverted V in males
  • almost 90 degress in females
• Pelvic inlet shape
  
  • android is more common in males
  • Gynecoid is more normal female type

Question 2

Non diaphragmatic pelvic muscles

Answer 2

• obturator internus
  
  • from the internal surface of the obturator membrane
  • to the greater trochanter
• Piriformis
  
  • From the internal surface of the sacrum (surrounding the ventral rami)
  • to the greater trochanter

Question 3

The surface area of the trunk between the thighs and the buttocks

Answer 3

Perineum

Question 4

Answer 4

Question 5

Question 6

Question 7

Question 8

Question 9

Muscles of the Pelvic diaphragm

Answer 9

• Pelvic diaphragm= coccygeus + levator ani
  
  • Levator ani= pubococcygeus + puborectalis + iliococcgeus

Question 10

Coccygeus attaches form the _____ to the ____ and ____, lies directly anterior to the ______

Answer 10

Coccygeus m. attaches from the ischial spine to the inferior sacrum and coccyx, lies directly anterior to the sacrospinous ligament

Question 12

_____ is posterior part tendinous arch and it blends with the anococcygeal ligament

Answer 12

Iliococcygeus

Question 13

Pubococcygeus origin and insertion

Answer 13

• Origin: pubic ramus
• insertion: Coccyx/sacrum and anococcygeal ligament

Question 14

____ is part of the levator ani and forms a loop around the anus

Answer 14

• Puborectalis
  
  • (note that the pubovaginalis and puboprostaticus are also subdivisions of the pubococcygeus)

Question 15

Answer 15

Question 16

Answer 16

Question 17

The tendinous arch of the levator ani muscles is derived from the

Answer 17

obturator internus fascia

Question 18

• Wedge-shaped area between skin and inferior surface of the pelvic diaphragm
  
  • usually filled with fat and loose connective tissue

Answer 18

Ischioanal Fossa(e)

Question 19

Boundaries of the Ischioanal fossa(e)

Answer 19

• 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 20

The pudenal canal containing the internal pudendal artery, vein, and pudendal nerve cross the pelvis surface of the

Answer 20

obturator internus