Abdomen / Breathing Muscles Origin / Insertion

Question 1

Rectus abdominis (o)

Answer 1

Pubic crest and symphysis

Question 2

Rectus abdominis (I)

Answer 2

Costal cartilage of 5th-7th ribs, xiphoid process

Question 3

External oblique (o)

Answer 3

Outer surface of inferior 8 ribs

Question 4

External oblique (I)

Answer 4

Linea alba, iliac crest, pubic crest

Question 5

Internal oblique (o)

Answer 5

Iliac crest, inguinal ligament, lumbar fascia

Question 6

Internal oblique (I)

Answer 6

Linea alba, pubic crest, cartilage of last few ribs

Question 7

Transversus abdominis (o)

Answer 7

Iliac crest, inguinal ligament, lumbar fascia, cartilages of inferior 6 ribs

Question 8

Transversus abdominis (I)

Answer 8

Linea alba, pubic crest

Question 9

Diaphragm (o)

Answer 9

Inferior internal surface of ribcage and sternum, costal cartilages of inferior 6 ribs, lumbar vertebrae

Question 10

Diaphragm (I)

Answer 10

Central tendon

Question 11

External intercostals (o)

Answer 11

Inferior border of rib above

Question 12

External intercostals (I)

Answer 12

Superior border of rib below

Question 13

Internal intercostals (o)

Answer 13

Superior border of rib below

Question 14

Internal intercostals (I)

Answer 14

Inferior border of rib above