Muscle Attachments of the Anterior Abdominal Wall

Origin and Insertion of Transversus Abdominis

The transversus abdominis is a key muscle in the anterior abdominal wall. It plays a crucial role in core stability and organ support.

Origin

The transversus abdominis originates from:

• Inner surfaces of the 7th to 12th costal cartilages
• Thoracolumbar fascia
• Iliac crest
• Lateral third of the inguinal ligament

Insertion

It inserts onto:

• Linea alba
• Pubic crest
• Conjoint tendon

Function

This muscle is essential for:

• Increasing intra-abdominal pressure
• Providing core stability
• Assisting in forced expiration

Clinical Significance

Weakness or dysfunction of the transversus abdominis can contribute to conditions like lower back pain and hernias.

Conclusion

Understanding the transversus abdominis is vital for medical professionals dealing with core stability and abdominal wall disorders.