ABDOMINAL MUCLES

INTRODUCTION FOR ABDOMINAL MUSCLE

 

 

1) EXTERNAL OBLIQUE MUSCLE

 
Origin : Lower ribs .
 
Insertion : Linea  Alba, pubic crest of tubercle.
Action : Trunk Flexion and lateral bend.

Nerve supply : Intercostal nerve.

 

2) INTERNAL OBLIQUE MUSCLE

Origin : Thoracolumbar fascia.
Action : flexion and lateral bend of trunk.
Nerve supply : Intercostal nerve.

3) TRANSVERSE ABDOMINIS

 
Origin : Lower six ribs , Thoracolumbar fascia.
Insertion : Linea alba and pubic crest.
Action : flexes and laterally bend the trunk.
Nerve supply : Intercostal nerve.

4) RECTUS ABDOMINIS

Origin : FROM Pubis and pubic symphysis
Insertion : Xiphoid process of sternum and costal cartilage 5-7.
Action : Flexion of trunk.

Nerve supply : Intercostal nerve.

 

5) PYRAMIDALIS

Origin : FROM Pubis , anterior to the rectus abdominus.
Insertion : Linea Alba.
Action : Draws the Linea Alba inferiorly.
Nerve supply : Subcostal nerve.

6) QUADRATUS LUMBORUM

Origin : Iliac crest ( posterior part ), and ileolumbar ligament.
Insertion : Transverse process of lumbar vertebrae 1-4.
Action : Flexion of 12 th rib , laterally bend the trunk.

 

7) PSOAS MAJOR

Origin : Bodies and transverse process of lumbar vertebrae .
Insertion : lesser trochanter of femur.
Action : Thigh flexion.
 

Nerve supply : Ventral primary Rami of spinal nerve.

 

8) PSOAS MINOR

Origin : Bodies of T12 and L1 vertebrae.
Insertion : ileopubic eminence.
 
Action : Flexion and lateral bend the lumbar vertebral column.
 
Nerve supply : Ventral primary Rami of spinal nerve.

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