Trunk

Question 1

origin: ribs 5-12
insertion: linea alba
action: laterally rotates trunk

Answer 1

external abdominal oblique

Question 2

origin: iliac crest
insertion: linea alba
action: laterally rotates trunk

Answer 2

internal abdominal oblique

Question 3

origin: iliac crest
insertion: linea alba
action: laterally rotates trunk

Answer 3

transversus abdominis

Question 4

origin: crest of pubis
insertion: xiphoid process
action: compresses abdominal wall

Answer 4

rectus abdominis

Question 5

origin: ribs 1-8
insertion: vertebral border
action : abducts scapula

Answer 5

serratus anterior

Question 6

origin: inferior border of a rib
insertion: superior border of rib below
action: elevates ribs

Answer 6

external intercostals

Question 7

origin: inferior border of a rib
insertion: superior border of rib below
action: depresses ribs

Answer 7

internal intercostals

Question 8

origin: lowers ribs
insertion: central tendon
action: inspiration (contraction)

Answer 8

diaphragm

Question 9

origin: vertebral column
insertion: vertebral column
action: extends and rotates vertebral column and head

Answer 9

Iliocostalis, longissimus, spinalis

Question 10

origin: sacrum
insertion: vertebral column
action: extends and rotates vertebral column

Answer 10

multifidus

Question 11

origin: posterior iliac crest
insertion: rib 12
action: extends and abducts vertebral column

Answer 11

Quadratus lumborum

Question 12

origin: spines of t2-5
insertion: lower one third of vertebral border of scapula
action: adducts scapula

Answer 12

rhomboideus major

Question 13

origin: spines c7-t1
insertion: vertebral border of scapula at scapular spine
action: adducts scapula

Answer 13

rhomboideus minor

Question 14

origin: ligamentum nuchae
insertion: occipital and temporal bone
action: extends and rotates head

Answer 14

splenius

Question 15

origin: c7-t12
insertion: occipital bone
action: extends head

Answer 15

semispinalis