Lumbopelvic Anatomy

Question 1

Sacroiliac Joint

Answer 1

between scrum and ilium
articulates on both sides of the sacrum

Question 2

Sacral Nutation

Answer 2

sacral flexion/ locking
iliac bones approximates and ischial tuberosities spread

Question 3

Sacral Counter Nutation

Answer 3

sacral extension/unlocking
iliac bones spread, ischial tuberosities approximate
anterosuperior glide of articular surface of sacrum

Question 4

Quadratus Lumborum Origin

Answer 4

Posterior inner lip of the iliac crest

Question 5

Quadratus Lumborum Insertion

Answer 5

1.5 length of the lower border of the 12th rib and the transverse process of the upper 4 L-vertebrae

Question 6

Quadratus Lumborum Action

Answer 6

Lateral flexion of the ipsilateral side
lateral pelvic rotation to contralteral side
lumbar extension
anterior pelvic rotation
stabilize the pelvis and lumbar spine

Question 7

Quadratus Lumborum Innervation

Answer 7

Branches of T12, L1-L4 nerves

Question 8

Rectus Abdominis Origin

Answer 8

Crest of pubis

Question 9

Rectus Abdominis Insertion

Answer 9

Cartilage of 5-6 ribs and xiphoid process

Question 10

Rectus Abdominis Action

Answer 10

Both sides lumbar flexion
both sides posterior pelvic rotation
each side weak lateral flexion to ipsilateral side

Question 11

Rectus Abdominis Innervation

Answer 11

Intercostal nerves (T7-T11)
Subcostal nerve (T12)

Question 12

External Oblique Abdominis Origin

Answer 12

Borders of lower 8 ribs at the side of the chest
will dovetail with serratus anterior

Question 13

External Oblique Abdominis Inseertion

Answer 13

anterior half of iliac crest
inguinal ligament
crest of pubis
fascia of RA at lower front

Question 14

External Oblique Abdominis Action

Answer 14

both sides lumbar flexion
both sides posterior pelvic rotation
each lumbar lateral flexion to ipsilateral side
each lateral pelvic rotation to contralateral side
each lumbar rotation to contralateral side

Question 15

External Oblique Abdominis Innervation

Answer 15

intercostal nerves (T8-T11)
subcostal nerve (T12)
iliohypogastric nerve (T12-L1)
ilioinguinal nerve (L1)

Question 16

Internal Oblique Abdominal Origin

Answer 16

Upper half of inguinal ligament
anterior 2/3 of ilium crest and lumbar fascia

Question 17

Internal Oblique Abdominal Insertion

Answer 17

costal cartilage 8-10 ribs and linea alba

Question 18

Internal Oblique Abdominal Action

Answer 18

both sides lumbar flexion
both posterior pelvic rotation
each lumbar lateral flexion ipsilateral side
each lateral rotation contralateral side
each lumbar rotation to ipsilateral side

Question 19

Internal Oblique Abdominal Innervation

Answer 19

intercostal nerves (T8-T11)
subcostal nerve (T12)
iliohypogastric nerve (T12-L1)
ilioinguinal nerve (L1)

Question 20

Linea Alba

Answer 20

runs from the xiphoid to the pubis

Question 21

Linea Semilunaris

Answer 21

moon shaped
lateral to each RA
aponeurosis connecting the lateral border of the RA with the medial border of the EOA and IOA

Question 22

Transverse Abdominis Origin

Answer 22

lateral 1/3 of inguinal ligament
inner rim of iliac crest
inner surface of costal cartilage of lower 6 ribs
lumbar fascia

Question 23

Transverse Abdominis Insertion

Answer 23

crest of pubis and iliopectinal line
abdominal aponeurosis to the linea alba

Question 24

Transverse Abdominis Action

Answer 24

forced expiration
pull the abdominal wall inward

Question 25

Transverse Abdominis Innervation

Answer 25

Intercostal nerves (T8-T11) Subcostal nerve (T12) iliohypogastric nerve (T12-L1) ilioinguinal nerve (L1)

Question 26

Psoas Major Origin

Answer 26

Sides of T12-L5 vertebrae transverse processes of L1-L5

Question 27

Psoas Major Insertion

Answer 27

Lesser trochanter of the femur

Question 28

Psoas Major Action

Answer 28

Hip flexion

Question 29

Psoas Major Innervation

Answer 29

Anterior Rami of L1-L3

Question 30

Psoas Minor Origin

Answer 30

Sides of T12-L1 vertebrae

Question 31

Psoas Minor Insertion

Answer 31

pectineal line iliopectineal eminence via iliopubic arch

Question 32

Psoas Minor Action

Answer 32

Hip flexion

Question 33

Psoas Minor Innervation

Answer 33

Anterior Rami of L2-L3

Question 34

Iliopsoas

Answer 34

psoas major and minor

Question 35

Sacro-iliac Ligaments

Answer 35

Anterior Sacro-iliac Ligament Interosseous iliac ligament Posterior Sacro-iliac Ligament Sacrotuberus Ligament Sacrospinous Ligament

Question 36

Anterior Sacro-iliac Ligament

Answer 36

anterior part of the fibrous capsule

Question 37

Interosseous iliac ligament

Answer 37

primary involved in transferring weight of the upper body to the iliac runs obliquely and out from sacrum

Question 38

Posterior Sacro-iliac Ligament

Answer 38

posterior external continuation of the interosseous iliac ligament runs obliquely and out from sacrum joined by fibers from the ilium and base of the coccyx to form the sacrotuberous ligament

Question 39

Sacrotuberous Ligament

Answer 39

passes from the posterior ilium and lateral sacrum and coccyx to the ischial tuberosities transforms the sciatic notch of the pelvis into a large sciatic foramen sacrum stabilization: prevent nutation

Question 40

Sacrospinous Ligament

Answer 40

goes from lateral sacrum and coccyx to the ischial spine divides the sciatic foramen into greater and lesser sacrum stabilization: prevent nutation

Question 41

Celiac Trunk

Answer 41

Originates from the aorta at T12 3 main branches - left gastric artery -common hepatic -splenic artery

Question 42

Common Iliac Artery

Answer 42

originates from abdominal aorta has a L & R each artery divides into an internal and external

Question 43

Internal Iliac artery

Answer 43

main artery of the pelvis

Question 44

External iliac Artery

Answer 44

supplies blood to the legs and feet branches to different names

Question 45

Common iliac Veins

Answer 45

originate from the internal iliac veins and external iliac veins start at L4-L5 forms inferior vena cava

Question 46

Sacral Plexus

Answer 46

located on the posterior wall of the lesser pelvis most nerves leave through the greater foramen 2 main nerves; sciatic and pudendal

Question 47

Sciatic Nerve

Answer 47

starts from sacral plexus L4-S3 largest nerve in the body goes through greater foramen in most humans, inferior to the piriformis and deep to glute max

Question 48

Pudendal Nerve

Answer 48

goes to sex organs, S4/S3

Question 49

Piriformis Syndrome

Answer 49

sciatic nerve going through or above piriformis can lead to compression or traction of nerve

Question 50

Superior Gluteal Nerve

Answer 50

part of sacral plexus L4-S1 passes through the greater sciatic foramen and superior to piriformis laterally between gluteus medius and minimus supplies gluteal region

Question 51

Inferior Gluteal Nerve

Answer 51

L5-S2 passes through greater sciatic foramen inferior to piriformis but superficial to sciatic nerve deep to inferior part of glute maximus runs with inferior gluteal artery supplies gluteal region