Muscles 2.0

Question 1

Internal and external intercostals

Origins

Answer 1

inferior border of rib above

Question 2

Internal and external intercostals

Insertions

Answer 2

superior border of rib below

Question 3

Internal and external intercostals

Actions - internal

Actions - external

Answer 3

internal- forced expiration and stabilisation

external- inspiration

Question 4

External oblique

Origin

Answer 4

5-12 external surface ribs

Question 5

External oblique

Insertions

Answer 5

Linea Alba, iliac crest, pubic tubercle to ASIS (inguinal ligament)

Question 6

External oblique

Actions

Answer 6

rotation (opposite side), lateral Flexion, flexion, posterior pelvic tilt

Question 7

Internal Oblique

Origins

Answer 7

iliac crest, inguinal ligament, thoracolumbar fascia

Question 8

Internal Oblique

Insertions

Answer 8

9/10-12 ribs, linea alba, conjoint tendon

Question 9

Internal Oblique

Actions

Answer 9

rotation (same side), lateral flexion, flexion, posterior pelvic tilt

Question 10

Rectus Abdominis

Answer 10

pubic symphysis, public crest

Question 11

Rectus Abdominis

Insertions

Answer 11

xiphoid process, 5-7 costal cartilages

Question 12

Rectus Abdominis

Actions

Answer 12

trunk flexion, posterior pelvic tilt, lateral flexion

Question 13

Transverse Abdominis

Actions

Answer 13

costal cartilages of 7-12 ribs, iliac crest 1/3 inguinal ligament

Question 14

Transverse Abdominis

Insertions

Answer 14

linea Alba, pectin pubis

Question 15

Transverse Abdominis

Actions

Answer 15

increase intra-abdominal pressure, stabilise lumbar spine

Question 16

Quadratus Lumborum

Origins

Answer 16

iliac crest, iliolumbar ligament

Question 17

Quadratus Lumborum

Insertions

Answer 17

12th rib (medial 1/2) first 4 lumbar vertebrae transverse processes

Question 18

Quadratus Lumborum

Actions

Answer 18

extension, stabilise 12 rib on inspiration, ipsilateral side flexion

Question 19

Psoas Major

Actions

Answer 19

Transvrse processes of L1-L5

Question 20

Psoas Major

Insertions

Answer 20

lesser trochanter

Question 21

Psoas Major

Actions

Answer 21

lumbar spine lateral flexion, hip flexion + lateral rotation

Question 22

Psoas Minor

Origin

Answer 22

T12 and L1 transverse processes and body

Question 23

Psoas Minor

Insertion

Answer 23

joins tendon of psoas major + iliac fascia (superior ramus of pubis)

Question 24

Psoas Minor

Actions

Answer 24

assist lordotic curvature of spine, posterior pelvic tilt

Question 25

Transversus Thoracis

Origins

Answer 25

posterior xiphoid process, 4-7 costal cartilages, lower 1/2 body of sternum

Question 26

Transversus Thoracis

Insertions

Answer 26

inner surface 2-6 costal cartilages

Question 27

Transversus Thoracis

Actions

Answer 27

forced expiration- pulls costal cartilages downwards