Lumbar spine - origin, insertions and actions

Question 1

what is the origin of the psoas major?

Answer 1

TP of T12 - L5

Question 2

what is the insertion of the psoas major?

Answer 2

lesser trochanter

Question 3

what is the action of the psoas major?

Answer 3

hip flexion

Question 4

what is the origin of the quadratus lumborum?

Answer 4

TP of L1 - L4

12th rib

Question 5

what is the insertion of the quadratus lumborum?

Answer 5

iliac crest

Question 6

what is the action of the quadratus lumborum?

Answer 6

hip extension and side flexion

Question 7

what is the origin of the latissimus dorsi?

Answer 7

SP of T7 - L5

sacrum, thoracolumbar fascia, last 4 ribs and iliac crest

Question 8

what is the insertion of the latissimus dorsi?

Answer 8

intertubercular groove of the humerus

Question 9

what is the action of the latissimus dorsi?

Answer 9

hip extension, medial rotation and shoulder adduction

Question 10

what is the origin of the erector spinae - iliocostalis lumborum?

Answer 10

iliac crest

Question 11

what is the insertion of the erector spinae - iliocostalis lumborum?

Answer 11

below borders of the lower 6 ribs

Question 12

what is the action of the erector spinae - iliocostalis lumborum?

Answer 12

hip extension, medial rotation and spinal rotation

Question 13

what is the origin of the erector spinae - spinalis?

Answer 13

SP of T11 - L2

Question 14

what is the insertion of the erector spinae - spinalis?

Answer 14

SP of upper 4 - 8 thoracic vertebrae

Question 15

what is the action of the erector spinae - spinalis?

Answer 15

spine extension

Question 16

what is the origin of the erector spinae - longissimus?

Answer 16

TP of the lumbar vertebrae

Question 17

what is the insertion of the erector spinae - longissimus?

Answer 17

TP of all thoracic vertebrae

and lower 9 ribs

Question 18

what is the action of the erector spinae - longissimus?

Answer 18

spine extension and side flexion

Question 19

what is the origin of the multifidus?

Answer 19

TP of thoracic vertebrae

AP of C4 - C7

MP of lumbar vertebrae

PSIS and sacrum

Question 20

what is the insertion of the multifidus?

Answer 20

SP of 2-4 vertebrae above the origin

Question 21

what is the action of the multifidus?

Answer 21

spine extension and side flexion

Question 22

what is the origin of the rectus abdominus?

Answer 22

pubis crest and pubis tubercle

Question 23

what is the insertion of the rectus abdominus?

Answer 23

XP and cartilages of ribs 5-7

Question 24

what is the action of the rectus abdominus?

Answer 24

lumbar flexion

Question 25

what is the origin of the transverse abdominus?

Answer 25

inner part of iliac crest, cartilages of lower 6 ribs and thoracolumbar of fascia

Question 26

what is the insertion of the transverse abdominus?

Answer 26

linea alba and pubis

Question 27

what is the action of the transverse abdominus?

Answer 27

lumbar rotation

Question 28

what is the origin of the internal obliques?

Answer 28

iliac crest and thoracolumbar of fascia

Question 29

what is the insertion of the internal obliques?

Answer 29

pubis, lower 4 ribs and linea alba

Question 30

what is the action of the internal obliques?

Answer 30

lumbar side flexion and flexion

Question 31

what is the origin of the external obliques?

Answer 31

sternum and outer side of the lower 8 ribs

Question 32

what is the insertion of the external obliques?

Answer 32

pubis, linea alba and iliac crest

Question 33

what is the action of the external obliques?

Answer 33

lumbar side flexion, flexion and rotation