Transverse Abdominis - Muscle Physiology & Functional Anatomy

 

Transverse Abdominis Muscle

 

Anatomy

 

Origin:

  • Inner rim of iliac crest, inguinal ligament, thoracolumbar fascia, & costal cartilages of inferior 6 ribs
     

Insertion:

  • Xiphiod process, linea alba, and pubis



Major Arteries:

 

Neural Innervation:

  • Thoracic spinal nerves T8-T12

  • Iliohypogastric nerve

  • Ilioinguinal nerve

 

Trigger Points:

 

 

Physiology

 

Concentric Functions:

  • Pulls abdominal wall inward (forced expiration) & increases intra-abdominal pressure

 

Eccentric Functions:
 

  • Dynamically stabilizes the lumbo-pelvic-hip complex during functional movements

 

Isometric Function:

  • Dynamically stabilizes the lumbo-pelvic-hip complex

 

Related Muscles

Antagonist:

Exercises:

 

 

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More Images of the Transverse Abdominis

 

 

 


More Information about the Transverse Abdominis

The transverse abdominis is also commonly written as the transversus abdominis.  The transverse abdominis muscle works together with the obliques to increase intra-abdominal pressure which supports the vertebral column in some exercises.

The transverse abdominis muscle is assisted by the rectus abdominis and obliques, in holding the abdomen flat.

 

 

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