Anatomy 1: Pelvis and Perineum

Question 1

Label the 6 parts of the ilium

Answer 1

See image

Question 2

Label the 5 parts of the ischium

Answer 2

See image

Question 3

Label the 4 parts of the pubis

Answer 3

See image

Question 4

Label the 11 parts of the hip bone from an internal view

Answer 4

See image

Question 5

Label the 8 parts of the sacrum and coccyx

Answer 5

Question 6

Describe the orientation of the pelvis

Answer 6

• ASIS and pubic tubercle in same vertical plane
• Tip of coccyx and pubic symphisys in the same horizontal plane
• Ischial tuberosity is what you sit on

Question 7

Define the greater (false) pelvis and the lesser (true) pelvis

Answer 7

Greater = above the pelvic inlet

Lesser = within the confines of the pelvic inlet and outlet

Question 8

Define the boundaries of the pelvic outlet (3)

Answer 8

• Pubic symphysis
• Ischial tuberosities
• Coccyx

Question 9

Define the boundaries of the pelvic inlet (5)

Answer 9

• Ala of the sacrum
• Arcuate line
• Pectineal line
• Pubic symphysis
• Sacral promontory

Question 10

Difference between false pelvis of male and female

Answer 10

• Female = wide and shallow
• Male = narrow and deep

Question 11

Difference between male and female pelvic inlet

Answer 11

• Female = transversely oval
• Male = heart-shaped

Question 12

Difference between male and female pelvic outlet

Answer 12

• Female = roomy and round
• Male = narrow and oblong

Question 13

Difference between male and female ischial tuberosities

Answer 13

Female = everted

Male = inverted

Question 14

Difference between male and female pelvic cavity

Answer 14

• Female = roomy and shallow
• Male = narrow and deep

Question 15

DIfference between male and female sacrum

Answer 15

• Female = short, wide and flat
• Male = long, narrow and convex

Question 16

Difference between female and male subpubic angle

Answer 16

Female = 90 - 100 degrees

Male = 70 degrees

Question 17

Label the 5 anterior ligaments of the pelvis

Answer 17

See image

Question 18

Label the 3 posterior ligaments of the pelvis

Answer 18

See image

Question 19

Foramena formed by the sacrospinous and sacrotuberous ligaments

Answer 19

• Greater sciatic foramen
• Lesser sciatic foramen

Question 20

Function of sacrospinous and sacrotuberous ligaments

Answer 20

Prevent upward tilting of the lower end of the sacrum by anchoring it to the ischium

Question 21

Location of piriformis muscle

Answer 21

From the anterolateral surface of the sacrum - out the greater sciatic foramen - to the greater trochanter of the femur

Question 22

Location of the obturator internus muscle

Answer 22

From the obturator membrane and surrounding bone - out the lesser sciatic foramen - to the greater trochanter of the femur (red lines)