Muscles of the Anterolateral Wall

Question 1

Name the muscles of the Anterolateral Abdominal Wall

Answer 1

External Oblique
Internal Oblique
Transversus Abdominis
Rectus Abdominis

Question 2

External Oblique - Origin

Answer 2

superficial to ribs 5-12

Question 3

External Oblique - Insertion

Answer 3

linea alba, pubic crest, and anterior portion of the iliac crest

Question 4

External Oblique - Innervation

Answer 4

thoraco-abdominal and subcostal nerves

Question 5

External Oblique - Action

Answer 5

lateral flexion to the same side
rotates the trunk to the opposite side
compresses abdomen

Question 6

Internal Oblique - Origin

Answer 6

thoracolumbar fascia, anterior part of the iliac crest, and inguinal ligament

Question 7

Internal Oblique - Insertion

Answer 7

ribs 10-12, linea alba, pubis

Question 8

Internal Oblique - Innervation

Answer 8

thoraco-abdominal nerves
subcostal nerves
1st lumbar nerve

Question 9

Internal Oblique - Action

Answer 9

flexes and rotates trunk to the same side

Question 10

Transversus Abdominis - Origin

Answer 10

costal cartilages 7-12, thoracolumbar fascia, iliac crest, inguinal ligament

Question 11

Transversus Abdominis - Insertion

Answer 11

linea alba, pubic crest, and pubis

Question 12

Transversus Abdominis - Innervation

Answer 12

thoracoabdominal nerves, subcostal nerves, and 1st lumbar nerve

Question 13

Transversus Abdominis - Action

Answer 13

compresses abdomen and stabilizes

Question 14

Rectus Abdominis - Origin

Answer 14

pubic symphysis and pubic crest

Question 15

Rectus Abdominis - Insertion

Answer 15

xiphoid process and costal cartilages 5-7

Question 16

Rectus Abdominis - Innervation

Answer 16

thoracoabdominal nerves and subcostal nerves

Question 17

Rectus Abdominis - Action

Answer 17

flexes trunk, compresses abdomen, stabilizes pelvis