Muscles of the Abdomen

Question 1

Origin is the xiphoid process, cartilages of ribs 4-10, and anterior of lumbar vertebrae.
Insertion is the central tendinous sheet.

Answer 1

Diaphragm

Question 2

Origin is the lower eight ribs

Insertion is the linea alba and iliac crest

Answer 2

External oblique

Question 3

Origin is the iliac crest and adjacent connective tissue

Insertion is the lower ribs, xiphoid of sternum, and linea alba

Answer 3

Internal oblique

Question 4

Origin is the cartilages of lower ribs, iliac crest, and adjacent connective tissues.
Insertion is the linea alba and pubis

Answer 4

Transversus abdominis

Question 5

Origin is the superior surface of the pubis around the symphysis
Insertion is the inferior surfaces of coastal cartilages (ribs 5-7) and xiphoid process.

Answer 5

Rectus abdominis

Question 6

Action: depresses ribs, flexes vertebral column

Answer 6

Rectus abdominis

Question 7

Action: compresses abdomen

Answer 7

Tranversus abdominis

Question 8

Two muscles action are to compress the abdomen, depresses the ribs, flexes or laterally flexes vertebral column

Answer 8

External & Internal oblique

Question 9

Action: contraction expands thoracic cavity, compresses abdominopelvic cavity.

Answer 9

Diaphragm