Muscle Attachments of the Anterior Abdominal Wall
Origin and Insertion of Rectus Abdominis
The rectus abdominis muscle is vital for trunk flexion and posture. Its origin in the pubic crest and insertion in the costal cartilages and xiphoid process enable these functions.
Muscle Attachments of the Anterior Abdominal Wall
Origin and Insertion of Rectus Abdominis
The rectus abdominis is a crucial muscle of the anterior abdominal wall, contributing to core strength, posture, and movement. Understanding its origin and insertion helps medical professionals and students grasp its function.
Origin
The rectus abdominis originates from the pubic crest and pubic symphysis of the pelvis. These attachments provide a stable foundation, allowing the muscle to facilitate flexion of the trunk.
Insertion
The muscle inserts onto the fifth, sixth, and seventh costal cartilages, as well as the xiphoid process of the sternum. This insertion enables the rectus abdominis to perform movements such as trunk flexion and compression of abdominal contents.
Function
- Flexes the trunk
- Supports posture and stabilizes the pelvis
- Assists in forced expiration and abdominal compression
Clinical Significance
Weakness or injury to the rectus abdominis can lead to issues such as poor posture, lower back pain, and impaired respiratory function. Strengthening exercises such as crunches and planks help maintain optimal function.
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