Principal Muscles of Anterolateral Abdominal Wall

Question 0

Insertion of External Obliques

Answer 0

Linea alba, pubic tubercle, and anterior half of iliac crest

Question 1

Origin of External Obliques

Answer 1

External surfaces of 5th-12th ribs

Question 2

Innervation of External Obliques

Answer 2

Thoraco-abdominal nerves (anterior rami of T7-T11) and subcostal nerve

Question 3

Action of External Obliques

Answer 3

Compress and support abdominal viscera; flex and rotate trunk

Question 4

Origin of Internal Obliques

Answer 4

Thoracolumbar fascia, anterior two thirds of illac crest, and connective tissue deep to inguinal ligament

Question 5

Insertion of Internal Obliques

Answer 5

Inferior borders of 10th-12th ribs, linea alba, and pubis via conjoint tendon

Question 6

Innervation of Internal Obliques

Answer 6

Thoraco-abdominal nerves (anterior rami of T7-T11), subcostal and first lumbar nerve

Question 7

Action of Internal Obliques

Answer 7

Copresses and supports abdominal viscera

Question 8

Origin of Transversus abdominis

Answer 8

Internal surfaces of 7th-12th costal cartilages, thoracolumbar fascia, illac crest, and connective tissue deep to inguinal ligament

Question 9

Insertion of Transversus abdominis

Answer 9

Linea alba with aponeurosis of internal oblique, pubic crest, and pubis via conjoint tendon

Question 10

Innervation of Transversus abdominis

Answer 10

Thoraco-abdominal nerves (anterior rami of T7-T11), subcostal and first lumbar nerve

Question 11

Action of Transversus abdominis

Answer 11

Compresses and supports abdominal viscera

Question 12

Origin of Rectus Abdominis

Answer 12

Pubic symphysis and pubic crest

Question 13

Insertion of Rectus Abdominis

Answer 13

Xiphoid Process and 5th-7th costal cartilages

Question 14

Innervation of Rectus Abdominis

Answer 14

Thoraco-abdominal and subcostal nerves(anterior rami of T7-T12 spinal nerves)

Question 15

Action of Rectus Abdominis

Answer 15

Flexes trunk (lumbar vertebrae) and compresses abdominal viscera, stabilizes and controls tilt of pelvis(anterilordosis)