Bones and Joints of the Pelvis Flashcards Preview

Hugh's MD1 Reproduction > Bones and Joints of the Pelvis > Flashcards

Flashcards in Bones and Joints of the Pelvis Deck (26)
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1
Q

Where does the pubic tubercle lie in relation to the pubic crest?

A

At its lateral edge

1
Q

What is the shape of the pelvic outlet in females? Does it differ in males?

A

Diamond

No

1
Q

What structures form the plane of least dimensions?

A

Ischial spine

S4

Base of pubic bone/pubic symphysis

2
Q

Which muscles reinforce the pubic symphysis?

A

The obliques and rectus muscle and aponeurosis

Adductor longus

3
Q

What movement is nutation?

A

Rotation of the sacro-iliac joint where the top of the sacrum moves in and the bottom moves out thereby opening the outlet. Counter-nutation is the opposite

4
Q

How does the babies face change orientation as it travels out of the birth canal?

A

It faces laterally in the inlet and

Posteriorly in the outlet

5
Q

In what orientation does the iliac fossa face?

A

Anteriomedially

7
Q

What structures line the pelvic inlet, from anterior to posterior

A

The pubic symphysis

Pubic crest

Pectineal line of pubis

Arcuate line of ilium

Sacroiliac joint

Ala

Promontory

7
Q

What are the two most common pelvic shapes in males?

A

Android

Anthropoid

8
Q

What runs along the superior pubic ramus?

A

The superior pectineal line

8
Q

Compare the subpubic angle in males and females

A

The angle is acute in males while it is obtuse in females

9
Q

Which aspect of the pubic bone does the ramus of the ischium connect with?

A

The inferior pubic ramus

10
Q

How does the articular surface of the sacroiliac joint appear?

A

Auricular shaped

Has a smooth articular component and rough area for ligament attachment

11
Q

What structures form the boundaries for the pelvic outlet?

A

The inferior angle of the pubic symphysis anteriorly

The two ischial tuberosities laterally

The coccyx posteriorly

12
Q

What demarcates the false and true pelvis?

A

The iliopectineal line

13
Q

Describe the structure of the pubic symphysis

A

Hyaline cartilage on bone external to the fibrous cartilage disc

14
Q

Which structures does the ischial spine separate?

A

The greater and lesser sciatic notch

15
Q

What type of joint in the pubic symphysis

A

Cartilaginous joint

16
Q

What are the ligaments of the sacroiliac joint called?

A

The anterior sacro-iliac ligament

The posterior sacro-iliac ligament

The interosseous sacro-iliac ligament

Plus accessory ligaments:

  • Iliolumbar
  • Sacrotuberous

Sacrospinous

18
Q

What is the name of the processes that project superiorly-lateral to the promontory?

A

The ala

20
Q

On what aspect of the ischium is the ischial tuberosity?

A

Posterioinferior

21
Q

Where is the greater sciatic notch in relation to the Posterior inferior iliac spine?

A

Inferior to it

22
Q

How does the shape of the pelvic inlet differ in females cf to males?

A

It is wider transversely

23
Q

What is the function of the false pelvis?

A

Protect the contents of the abdominal cavity

25
Q

What are the ligaments of the pubic symphysis?

A

The superior pubic ligament

The inferior arcuate ligament

26
Q

Apart from stabilising the sacro-iliac joint, what is the function of the sacrotuberous and sacrospinous ligament?

A

Close the greater and lesser sciatic notches respectively, into foramen