What are the 4 anterior abdominal muscles?

Structure and Function

2 vertical muscles located on the midline (bisected by linea alba): Rectus abdominis; and pyramidalis.
3 flat muscles on the anterolateral side arranged from superficial to deep; external abdominal oblique, internal abdominal oblique, transversus abdominis.

What are the anterior abdominal muscle?

The anterior muscle group includes the rectus abdominis and pyramidalis muscles. These are almost completely enveloped by the thick rectus sheath formed by the aponeuroses of the lateral abdominal muscles.

What is anterior to the rectus abdominis?

Rectus abdominis belongs to the anterior abdominal muscles together with pyramidalis muscle. But taking the functional anatomy into account, these two muscles comprise the anterolateral abdominal wall along with the three lateral abdominal muscles; external oblique, internal oblique and transversus abdominis.

What are the three layers of abdominal muscles?

There are nine layers to the abdominal wall: skin, subcutaneous tissue, superficial fascia, external oblique muscle, internal oblique muscle, transversus abdominis muscle, transversalis fascia, preperitoneal adipose and areolar tissue, and peritoneum. Nerves, blood vessels, and lymphatics are present throughout.

What are the parts of anterior abdominal wall?

Components of the anterior abdominal wall

Skin and subcutaneous tissue.
Superficial fascia.
External oblique muscle.
Internal oblique muscle.
Transversus abdominis muscle.
Deep fascia (transversalis fascia): fuses with the deep fascia of the thigh (fascia lata)
Preperitoneal adipose tissue.
Parietal peritoneum.

What is an anterior abdominal wall?

The anterior abdominal wall forms the anterior limit of the abdominal viscera and is defined superiorly by the xiphoid process of the sternum and costal cartilages and inferiorly by the iliac crest and pubic bones of the pelvis.

What are the six pack muscles called?

rectus abdominis
rectus abdominis – slung between the ribs and the pubic bone at the front of the pelvis. When contracting, this muscle has the characteristic bumps or bulges that are commonly called ‘the six pack’. The main function of the rectus abdominis is to move the body between the ribcage and the pelvis.

What are the lowest abs called?

transversus abdominis
The deepest layer of abdominal muscles is called the “transversus abdominis” or TVA.

Which is a role of the anterior abdominal wall muscles?

Providing a durable and flexible covering to prevent the abdominal viscera from leaving the abdominal cavity. Protecting internal abdominal organs from trauma/injury. Maintaining the anatomical position of the abdominal organs. Assisting expiration by pushing the abdominal organs towards the diaphragm.

What are the layers of the anterior abdominal wall?