Pelvis And Perineum Flashcards Preview

Anatomy > Pelvis And Perineum > Flashcards

Flashcards in Pelvis And Perineum Deck (24)
Loading flashcards...
1

The pelvis

The part of the trunk inferoposterior to the abdomen and is the area of transition between the trunk and the lower limbs

2

The pelvic cavity

A continuation of the abdominal cavity into the pelvis through the pelvic inlet

3

The perineal region

The area of the trunk between the thighs and buttocks extending from the pubis to the coccyx

4

The perineum

A shallow compartment lying deep to this area and inferior to the pelvic diaphragm

5

The pelvic inlet is bounded by the linea terminalis which is formed by

Superior margin of the pubic symphysis anteriorly
Posterior border of the pubic crest
Pecten pubis the continuation of the superior ramus of the pubis which forms a sharp ridge
Arcuate line of the ilium
Anterior border of the ala of the sacrum
Sacral promontory

6

The pelvic outlet is bounded by

Inferior margin of the pubic symphysis anteriorly
Inferior rami of the pubis and ischial tuberosities anterolaterally
Sacrotuberous ligaments posterolaterally
Tip of the coccyx posteriorly

7

Main functions of the pelvic girdle

Transfer weight of the upper body from the axial to the lower appendicular skeleton for standing and walking

To withstand compression and other forces resulting from its support of body weight

To house and protect the pelvic viscera

8

What are the three bones of the pelvic girdle

Right and left hip bones
- ilium ischium pubis

And the sacrum

9

The hip bones are joined where

The pubic symphysis

Sacrifices-iliac joints

10

Sacro-Iliac joints

Synovial joints
Limited movement tho!

Sacrotuberous and sacropinous ligaments allow some movement

11

Muscles of the pelvis walls and floors

Coccygeus

Obturator internus

Piriformis

12

Coccygeus

Superior - ischial spine

Inferior - inferior end of sacrum and coccyx

Innervation - branches of s4 and s5 nerves

Action - forms small part of pelvic diaphragm that supports pelvic viscera
Flexes coccyx

13

Obturator internus

Superior - pelvic surface of ilium and ischium obturator membrane

Inferior - greater trochanter of femur

Innervation - nerve to obturator internus (L5,s1,s2)

Action - laterally rotates hip joint assists in holding head of femur in acetabulum

14

Piriformis

Superior - pelvic surface of 2-4 sacral segments superior margin of greater sciatic notch and sacrotuberous ligament

Inferior - greater trochanter of femur

Innervation - anterior rami of s1 and s2

Action - laterally rotates hip joint abducts hip joint assists in holding head of femur in acetabulum

15

6 nerves of sacral and coccygeal plexuses

Sciatic
Superior gluteal
Inferior gluteal
Nerve to piriformis
Nerve to quadratus femoris and inferior gemellus
Nerve to obturator internus and superior gemellus

16

Sciatic nerve distribution

Articular branches to hip joint and muscular branches to flexors or knee and all muscles in leg and foot

17

Superior gluteal nerve distribution

Gluteus medius gluteal minimus and tensor fasciae latae muscles

18

Inferior gluteal nerve distribution

Gluteus Maximus muscle

19

Never to piriformis distribution

Piriformis muscle

20

Nerve to quadratus femoris and inferior gemellus distribution

Quadratus femoris and inferior gamellus muscles

21

Nerve to obturator internus and superior gamellus distribution

Obturator internus and superior gemellus muscles

22

Sacrococcygeal joint

Secondary cartilaginous joint
Join the apex of the sacrum to the base of the coccyx

23

Sacrococcygeal ligaments

Long strands that reinforce the joint (sacrococcygeal)

24

Lumbosacral joints

Lumbosacral ligaments

Intervertebral joint
Zygapophysial joint (facet joints)

Iliolumbar ligaments unite the transverse process of L5 to the ilia