Abdominal Muscles

Question 1

Rectus Abdominis

Answer 1

Origin:
Pubic symphysis & pubic crest

Insertion:
Xiphoid process & 5th-7th costal cartilages

Function:
Flexes and rotates vertebral column

Question 2

External Obliques

Answer 2

Origin:
Lower eight ribs

Insertion:
Linea alba, Pubic tubercle & Anterior half of iliac crest

Function:
Compresses abdomen, Flexes & Rotates vertebral column

Question 3

Internal Obliques

Answer 3

Origin:
Thoracolumbar fascia, Iliac crest & connective tissue deep to inguinal ligament

Insertion:
Inferior borders of 10th-12th ribs, Linea alba & via a conjoint tendon to the pubis

Function:
Compresses abdomen, Flexes & Rotates vertebral column

Question 4

Transversus Abdominis

Answer 4

Origin:
Inguinal ligament, Thoracolumbar fascia, Iliac crest & Costal cartilages of lower six ribs

Insertion:
Linea alba with aponeurosis of internal oblique, Pubic crest & Pecten pubis via conjoint tendon

Function:
Compresses abdomen

Question 5

Origin:
Pubic symphysis & pubic crest

Insertion:
Xiphoid process & 5th-7th costal cartilages

Function:
Flexes and rotates vertebral column

Answer 5

Rectus Abdominis

Question 6

Origin:
Lower eight ribs

Insertion:
Linea alba, Pubic tubercle & Anterior half of iliac crest

Function:
Compresses abdomen, Flexes & Rotates vertebral column

Answer 6

External Obliques

Question 7

Origin:
Thoracolumbar fascia, Iliac crest & connective tissue deep to inguinal ligament

Insertion:
Inferior borders of 10th-12th ribs, Linea alba & via a conjoint tendon to the pubis

Function:
Compresses abdomen, Flexes & Rotates vertebral column

Answer 7

Internal Obliques

Question 8

Origin:
Inguinal ligament, Thoracolumbar fascia, Iliac crest & Costal cartilages of lower six ribs

Insertion:
Linea alba with aponeurosis of internal oblique, Pubic crest & Pecten pubis via conjoint tendon

Function:
Compresses abdomen

Answer 8

Transversus Abdominis