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Gross II Final > Pelvis > Flashcards

Flashcards in Pelvis Deck (73):
1

What are the four functions of the pelvis?

Locomotion, parturition, support of abdominal viscera, protection of pelvic viscera

2

What is necessary for the pelvis to maintain to permit efficient bipedal locomotion?

Small enough pelvic dimensions

3

What is necessary for the pelvis to maintain to permit passage of the fetal head during parturition?

Large enough pelvic dimensions

4

What structures are shaped to support abdominal structures in the pelvic region?

Laterally flaring ilia

5

In what part of the pelvis does protection of the pelvic viscera take place?

True pelvis

6

What shape is the overall pelvis?

Basin-shaped

7

What four bones make up the pelvis?

Left hip bone, right hip bone, sacrum, coccyx

8

What three bones make up each hip bone?

Ilium, ischium, pubis

9

In anatomical position, what parts of the pelvis lie in the same vertical plane in the pelvic tilt?

ASIS and upper margin of the pubic symphysis

10

In anatomical position, what parts of the pelvis lie in the same horizontal plane in the pelvic tilt?

Tip of the coccyx and the upper margin of the pubic symphysis

11

The pelvic cavity projects in which direction from the abdominal cavity?

Posteriorly

12

What is the superior aperture of the pelvis?

Pelvic inlet

13

What are the boundaries of the pelvic inlet?

Sacral promontory, sacral alae, arcuate line, pecten pubis (pectineal line), pubic crest

14

What is the continuous border formed by the boundaries of the pelvic inlet called?

Pelvic brim/linea terminalis

15

The area of the pelvis located above the pelvic brim is called what?

Greater (false) pelvis

16

The area of the pelvis located below the pelvic brim is called what?

Lesser (true) pelvis

17

What is the function of the greater (false) pelvis?

Supports abdominal viscera, point of attachment for muscles of locomotion

18

What is the pelvic cavity proper?

Lesser (true) pelvis

19

What does the true pelvis contain?

Lower part of the GI tract, urinary bladder, lower part of ureter, internal reproductive organs

20

What is the inferior aperture of the pelvis?

Pelvic outlet

21

What shape is the pelvic inlet?

Oval or heart-shaped

22

What shape is the pelvic outlet?

Diamond shaped

23

What are the boundaries of the pelvic outlet?

Pubic symphysis, ischiopubic rami, ischial tuberosities, sacrotuberous ligament, tip of the coccyx

24

What makes up the pubic arch?

Pubic symphysis, ischiopubic rami, and ischial tuberosities

25

What covers the entire pelvic outlet?

Perineum

26

What characterizes an anthropoid pelvis?

Long A-P diameter and short transverse diameter

27

What type of pelvis is present in some males and approximately 20% of females?

Anthropoid

28

What is the rarest pelvis type?

Platypelloid

29

What characterizes a platypelloid pelvis?

Short A-P diameter and wide transverse diameter

30

What type of pelvis is rare in males and present in 2% of females?

Platypelloid

31

What type of pelvis is most associated with birthing difficulties?

Platypelloid

32

What type of pelvis has a heart-shaped inlet?

Android

33

What type of pelvis is found in most males and approximately 30% of females?

Android

34

What type of pelvis can be common among female athletes?

Android

35

What type of pelvis has an ovoid or round inlet?

Gynecoid

36

What type of pelvis is present in 50% of females and no males?

Gynecoid

37

What type of pelvis is ideal for childbirth?

Gynecoid

38

The pelvis of which gender is generally larger, heavier, and has more pronounced muscle markings?

Male

39

The male inlet is usually what shape?

Heart-shaped

40

The female inlet is usually what shape?

Oval

41

In which gender are the pelvic cavity and outlet larger?

Female

42

In which gender are the ilia more flaring?

Male

43

In which gender is the subpubic angle larger?

Female

44

In which gender is the greater sciatic notch broad and shallow?

Female

45

In which gender is the greater sciatic notch narrow and deep?

Male

46

In which gender is the sacrum shorter and wider?

Female

47

The lumbosacral joint is located between what vertebral osseous features?

L5 and sacrum

48

Which pelvis joints contain an intervertebral disc?

Lumbosacral joint and sacrococcygeal joint

49

What is the name of the joint located between the sacrum and ilium?

Sacroiliac joint

50

What type of joint is the sacroiliac joint?

Synovial

51

What is significant of the synovial sacroiliac joint?

It is the least mobile synovial joint in the body

52

What joint is located between the two pubic bodies?

Pubic symphysis

53

What type of joint is the pubic symphysis?

Fibrocartilaginous joint

54

What type of disc does the pubic symphysis contain?

Interpubic disc

55

What joint is located between the sacrum and coccyx?

Sacrococcygeal joint

56

Which pelvic joint is often fused?

Sacrococcygeal joint

57

Which pelvic joint may separate by 1 centimeter during pregnancy?

Pubic symphysis

58

What hormone is responsible for making the joints of the pelvis loose during pregnancy?

Relaxin

59

What two ligaments are involved in forming the greater and lesser sciatic foramen?

Sacrotuberous and sacrospinous ligaments

60

Which ligament extends from the sacrum and coccyx to the ischial tuberosity?

Sacrotuberous ligament

61

Which ligament extends from the sacrum and coccyx to the ischial spine?

Sacrospinous ligament

62

What are the boundaries of the greater sciatic foramen?

Greater sciatic notch, sacrotuberous & sacrospinous ligaments

63

Where does the greater sciatic foramen lie in reference to the pelvic floor?

Above it

64

What does the greater sciatic foramen transmit?

Piriformis muscle, superior and inferior gluteal vessels and nerves, internal pudendal vessels, pudendal nerve, sciatic nerve, posterior cutaneous nerve of thigh, nerve to the obturator internus muscle, nerve to the quadratus femoris muscle

65

What are the boundaries of the lesser sciatic foramen?

Lesser sciatic notch, sacrotuberous & sacrospinous ligaments

66

Where does the lesser sciatic foramen lie in reference to the pelvic floor?

Below it

67

What does the lesser sciatic foramen transmit?

Tendon of the obturator internus muscle, nerve to the obturator internus muscle, internal pudendal vessels, pudendal nerve

68

What is the only thing that goes through the lesser sciatic foramen and NOT the greater sciatic foramen?

Tendon of the obturator internus muscle

69

What structures pass through both the greater and lesser sciatic foramen?

Pudendal nerve, internal pudendal vessels, and nerve to obturator internus

70

What can happen to the sacrum leading to impingement on structures which exit the greater sciatic foramen?

Sacral misalignment

71

What is especially vulnerable in a sacral misalignment?

Sciatic nerve

72

What is sciatica?

Pain, numbness, and weakness in the lateral posterior thigh and leg

73

What are intrapelvic causes of sciatica?

Piriformis syndrome, compression by the fetal head during pregnancy, pelvic tumors