Muscles of the Thorax/LPHC

Question 1

What are the erector spinae muscles?

Answer 1

iliocostalis, longissimus, spinalis

Question 2

Origin of iliocostalis

Answer 2

medial iliac crest, thoracolumbar aponeurosis from sacrum, post. aspect of ribs 3-12

Question 3

Insertion of iliocostalis

Answer 3

post. ribs 1-12, cervical transverse processes of 4-7

Question 4

Origin of longissimus

Answer 4

medial iliac crest, thoracolumbar aponeurosis from sacrum, lumbar transverse process 1-5, thoracic transverse 1-5, cervical articular processes 5-7

Question 5

Insertion of longissimus

Answer 5

cervical 2-6 spinous processes, thoracic transverse processes 1-12, bottom 9 ribs, mastoid process

Question 6

Origin of spinalis

Answer 6

ligamentum nuchae, 7th cervical spinous process, 11-12 thoracic spinous process, 1-2 lumbar spinous process

Question 7

Insertion of spinals

Answer 7

2nd cervical spinous process, 5-12 thoracic spinous processes, occipital bone

Question 8

Origin of QL

Answer 8

post. inner lip of the iliac crest

Question 9

Insertion of QL

Answer 9

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

Question 10

Origin of rectus abdominis

Answer 10

Crest of the pubis

Question 11

Insertion of rectus abdominis

Answer 11

Cartilage of 5-6 ribs and xiphoid process

Question 12

Origin of external obliques

Answer 12

borders of lower 8 ribs at the side of the chest

Question 13

Insertion of external obliques

Answer 13

anterior half of the ilium crest, inguinal ligament, crest of pubis, and fascia of rectus abdominis at the lower front

Question 14

Origin of internal obliques

Answer 14

upper 1/2 of inguinal ligament, anterior 2/3 of ilium crest and lumbar fascia

Question 15

Insertion of internal obliques

Answer 15

costal cartilage 8-10 ribs and the linea alba

Question 16

Origin of T.V.A

Answer 16

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

Question 17

Insertion of T.V.A

Answer 17

crest of pubis and the iliopectineal line, abdominal aponeurosis to the linea alba

Question 18

Origin of psoas major

Answer 18

sides of T12 - L5 vertebrae, transverse processes of L1-5

Question 19

Insertion of psoas major

Answer 19

Lesser trochanter of the femur

Question 20

Origin of psoas minor

Answer 20

sides of T12 - L1 vertebrae

Question 21

Insertion of psoas minor

Answer 21

pectineal line, iliopectineal eminence via the iliopubic arch