Unit 2: Lecture 17 (Bony Pelvis & Hip) Flashcards Preview

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Flashcards in Unit 2: Lecture 17 (Bony Pelvis & Hip) Deck (43):
1

Pelvic Girdle composition

- 2 coxal bones (form pelvic walls)
- sacrum & coccyx (form posterior wall)

2

What bones fuse together to make hip bone?

- ilium
- ischium
- pubis

3

Where does the fusion of the hipbone take place?

acetabulum (hip joint socket)

4

True pelvis

Anything BELOW the line arcuate line of the ilium/pectineal line of the pubis

5

False pelvis

Anything ABOVE the line arcuate line of the ilium/pectineal line of the pubis

6

What is the longest and strongest bone in the body?

Femur, jackass.

7

Small depression in head of femur?

Fovea capitis

8

What is the angle between the head/neck/shaft of femur called?

Angle of inclination (125°)

9

Joints of pelvic girdle (4)

- lumbrosacral joint
- sacrococcygeal joint
- interpubic joint
- sacroiliac (SI) joint

10

Lumbrosacral joint

attaches pelvic girdle to the axial skeleton

11

What two ligaments support the sacrococcygeal joint?

- lateral sacrococcygeal ligament
- posterior sacrococcygeal ligament

12

What ligaments support the sacroiliac (SI) joint? (4 + 2 accessory ligaments)

- posterior ligament
- interosseous sacroiliac ligament
- anterior sacroiliac ligament
- iliolumbar ligament
+ sacrotuberous ligament
+ sacrospinous ligament

13

Which two ligaments convert the greater sciatic and lesser sciatic notches into the greater and lesser sciatic foramina?

- Sacrotuberous ligament
- Sacrospinous ligament

14

Which muscle exits out of the pelvis through the greater sciatic foramen?

Piriformis muscle

15

Which structures exit the greater sciatic foramen ABOVE the piriformis?

Superior gluteal nerves and vessels

16

Which structures exit the greater sciatic foramen BELOW the piriformis? (7)

- inferior gluteal nerves and vessels
- internal pudendal vessels
- pudendal nerve
- sciatic nerve
- posterior femoral cutaneous nerve
- nerve to obturator internus
- nerve to quadratus femoris

17

Boundaries of lesser sciatic foramen

Anterior: body of ischial tuberosity
Superior: ischial spine and sacrospinous ligament
Posterior: sacrotuberous ligament

18

Which tendon EXITS the pelvis via the lesser sciatic foramen?

Obturator internus tendon

19

Which structures ENTER the pelvis through the lesser sciatic foramen?

- Pudendal nerve
- Internal pudendal vessels
- Nerve to obturator internus

20

The hip joint is designed for...

support

21

The head of the femur is covered by ___________

thick hyaline cartilage

22

A fibrocartilaginous rim called the ____________ is attached to the margins of the acetabulum

acetabular labrum

23

The acetabular labrum is continuous with the ___________

transverse ligament of the acetabulum

24

In the acetabulum, the ____________ provides a passage for the vessels and the nerves to the hip joint

acetabular notch

25

Ligaments associated with hip joint: (6)

- articular capsule (thick and strong)

- iliofemoral ligament/Y-shaped ligament of Bigelow (prevents overextension of joint)

- pubofemoral ligament (prevents ABduction)

- ischiofemoral ligament (limits medial rotation)

- ligamentum capitis femoris (provides blood vessels to head of femur)

- transverse ligament of acetabulum (closes acetabulum)

26

Gluteus maximus


A: extends and laterally rotates thigh; helps extend knee

N: Inferior gluteal nerve

27

Gluteus medius

A: Abducts thigh at hip; tilts pelvis when walking to permit opposite leg to clear ground

N: Superior gluteal nerve

28

Gluteus minimus


A: Abducts thigh at hip; tilts pelvis when walking to permit opposite leg to clear ground

N: Superior gluteal nerve

29

Tensor Fasciae Latae


A: Helps flex, abduct (medially rotates thigh); assists gluteus maximus in extending the knee joint.

N: Superior gluteal nerve

30

Piriformis


A: Lateral rotator of thigh at hip joint

N: Nerve to piriformis

31

Obturator internus


A: Lateral rotator of thigh at hip joint

N: Nerve to obturator internus

32

Gemellus Superior


A: Lateral rotator of thigh at hip joint

N: Nerve to obturator internus

33

Gemellus Inferior


A: Lateral rotator of thigh at hip joint

N: Nerve to quadratus femoris

34

Quadratus femoris


A: Lateral rotator of thigh at hip joint

N: Nerve to quadratus femoris

35

Obturator externus


A: Laterally rotates thigh at hip joint

N: Obturator nerve (post. division)

36

Active external rotation of hip muscles: (6)

- piriformis
- obturator internus
- superior gemellus
- inferior gemellus
- quadratus femoris
- obturator externus

37

Active hip ABduction of hip muscles: (5)

- piriformis
- obturator internus
- superior gemellus
- inferior gemellus
- obturator externus

38

Active ADduction of hip muscle:

- quadratus femoris

39

Common iliac artery divisions:

- external iliac artery
- internal iliac artery

40

Internal iliac artery divisions:

- anterior trunk
- posterior trunk

41

External iliac artery turns into...

femoral artery

42

Posterior trunk becomes...

superior gluteal artery

43

Anterior trunk becomes...

inferior gluteal artery