PAW: Muscles (except Diaphragm) + Thoracolumbar Fascia

Question 1

Psoas Major origin

Answer 1

• lumbar vertebare All transverse processes, Side of bodies & intervertebral discs (tendinous Arches bridging over lumbar vessels)

Question 2

Psoas Major insertion

Answer 2

1. Joins Iliacus to for Ilio-psoas
2. passes deep to inguinal ligament to insert into lesser trochanter of Femur

Question 3

Nerve Supply of Psoas Major

Answer 3

L2,3,4

Question 4

Action of Psoas Major

Answer 4

• Main thigh flexor
• Medial rotator
• lateral Bending of trunk (one side)
• Foreward bending of trunk (both sides)
• lateral rotator only when Neck of femur is fractured due to change in rotational Axis

Question 5

Origin of psoas Minor

Answer 5

Last thoracic & first lumbar vertebrae

Question 6

Insertion of Psoas Minor

Answer 6

1. Descends in front of psoas Major
2. Inserted in Iliopectineal Eminence

Question 7

Nerve supply of Psoas Minor

Answer 7

L1 (first lumbar Nerve)

Question 8

Action of psoas Minor

Answer 8

Assisting in trunk flexion
(present only in 60 % of people)

Question 9

Origin of Quadratus Lumborum

Answer 9

• Iliolumbar ligament
• medial of Inner lip of iliac crest

Question 10

Insertion of Quadratus Lumborum

Answer 10

• Medial 1/2 of last rib
• upper 4 lumbar vertebra transverse proccess tips

Question 11

Nerve supply of Quadratus Lumborum

Answer 11

T12,L1,L2,L3,L4

Question 12

Action of Quadratus Lumborum

Answer 12

• Fixes last rib to help Diaphragm contract efficiently
• bending (lateral flextion) of vertebral column (one side)
• Extension of lumbar part of Vertebral column (both sides)

Question 13

Iliacus Origin

Answer 13

Iliac fossa

Question 14

Iliacus Insertion

Answer 14

Ilio-psoas tendon descends behind inguinal Canal & inserts into Lesser trochanter of Femur

Question 15

Iliacus Nerve supply

Answer 15

(main trunk of) Femoral N

Question 16

Iliacus Action

Answer 16

thigh flextion

Question 17

Anterior relations of Psoas Major in Abdomin & pelvis

Answer 17

• Medial Arcute ligament of Diaphragm
• Psoas Minor
• Kidney
• renal Vessels
• Ureter
• Gonadal Vessels
• Genitofemoral N
• Duodenum (right side= 3rd part, left side= 4th part)
• ileum end (right side) & descending Colon (left side)
• Inguinal Ligament

Question 18

posterior relations of Psoas Major in Abdomin & pelvis

Answer 18

• Lumbar ver. transverse process
• Lumbar Arteries
• Lumbar Nerves forming lumbar plexus
• medial edge of Quadratus lumborum

Question 19

Medial relations of Psoas Major in Abdomin & pelvis

Answer 19

• Sympathetic Chain
• External Iliac Vessles
• obturator Nerve
• Lumbosacral trunk
• Left side= Aorta, right side= IVC

Question 20

Lateral relations of Psoas Major in Abdomin & pelvis

Answer 20

• Quadratus Lumborum
• iliacus
• iliohypogastric N
• Ilioinguinal N
• lateral cutaneous N of thigh
• Femoral N

Question 21

Anterior relations of Psoas Major in thigh

Answer 21

Femoral Artery (inside femoral Sheath)

Question 22

posterior relations of Psoas Major in thigh

Answer 22

hip joint capsule

Question 23

Medial relations of Psoas Major in thigh

Answer 23

Pectineus muscle

Question 24

lateral relations of Psoas Major in thigh

Answer 24

Femoral N (between the psoas major & iliacus)

Question 25

Thickening of Psoas Fascia above forms

Answer 25

medial Arcute ligament

Question 26

Clinal Importance of Psoas Fascia

Answer 26

during Spine T.B, it forms psoas Cold Abcess, showing abdominal & thigh swelling with Cross fluctuation in between

Question 27

Anterior layer of Thoracolumbar Fascia Covers

Answer 27

Anterior Aspect of Quadratus Lumborum (and thickens above to form lateral Arcuate ligament)

Question 28

middle layer of Thoracolumbar fascia Covers

Answer 28

Posterior aspect of Quadratus Lumborum (seperating it from sacrospinalis muscle)

Question 29

Posterior layer of Thoracolumbar fasica Covers

Answer 29

Medial part of back of Sacrospinalis & fuses with middle layer of Back of lumabr Fascia