Abdomen and Back

Question 1

Rectus Abdominis

Answer 1

O: pubic symphysis
I: xiphoid process and costal cartilage
A: compresses abdomen, flexes vertebral column

Question 2

External Oblique

Answer 2

O: outer surface of lower 8 ribs
I: linea alba
A: compresses abdomen, flexes vertebral column laterally

Question 3

Internal Oblique

Answer 3

O: iliac crest
I: linea alba
A: compresses abdomen, flexes vertebral column laterally

Question 4

Diaphragm

Answer 4

O: bottom of rib cage, sternum and lumbar vertebrae
I: central tendon
A: inspiration

Question 5

External Intercostals

Answer 5

O: inferior border of rib above
I: superior border of the rib below
A: elevates the ribs for inspiration

Question 6

Internal Intercostals

Answer 6

O: superior border of the rib below
I: inferior border of the rib above
A: depresses the ribs for forced expiration

Question 7

Iliocostalis

Answer 7

O: iliac crest
I: ribs
A: extend the vertebral column

Question 8

Longissimus

Answer 8

O: transverse processes of the lumbar vertebrae
I: transverse processes of the thoracic vertebrae
A: extend the vertebral column

Question 9

Spinalis

Answer 9

O: spinous processes of the upper lumbar vertebrae and lower thoracic vertebrae
I: spinous processes of the upper thoracic vertebrae
A: extend the vertebral column