Transverse Abdominis

Other Names

• Transverse Abs

Heads

• Transverse Abdominis

Movement

Spine (Lumbar)

• Forced expiration
  • pulls abdominal wall inward
• Compresses and supports abdominal viscera
• Assist in expulsion of abdominal organ contents
  • as in urination, defecation, vomiting, and child birth
• Intra-abdominal pressure

Attachments

Origin

• Thoracolumbar Fascia (Lumbar Fascia)
• Ribs 6-12 (Lower 6 Ribs)
  • Costal cartilages
  • Inner surfaces
• Ilium
  • Illiac Crest
    • Inner rim
• Inguinal Ligament
  • Lateral third

Insertion

• Pubis
  • Crest
  • Ilippectineal line
• Abdominal Aponeurosis
• Linea Alba

Related Muscles

• Rectus Abdominis
• Obliques

Comments

Also known as Transversus Abdominus. The Obliques and the Transversus Abdominis increase the intra-abdominal pressure necessary for the support of the vertebral column in exercises such as squats and deadlifts. With the assistance of the Rectus Abdominis and Obliques, the Tranverse Abdominis hold the abdomen flat.