What are the 4 functions of the rectus abdominis?
What are the 4 functions of the rectus abdominis?
Rectus abdominis muscle
| Origin | Pubic symphysis, pubic crest |
|---|---|
| Blood supply | Inferior epigastric and superior epigastric arteries; contributions from posterior intercostal, subcostal and deep circumflex arteries |
| Function | Trunk flexion, compresses abdominal viscera, expiration |
What are the rectus abdominis muscles?
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 is the origin and insertion of rectus abdominis?
The rectus abdominis has two points of origin. The lateral head originates from the crest of the pubis, between the pubic symphysis and the pubic tubercle….Origin and insertion.
| Origin | Pubic symphysis, Pubic crest |
|---|---|
| Insertion | Xiphoid process, Costal cartilages of ribs 5-7 |
Why is the rectus abdominis important?
Function. The main actions for rectus abdominis are: Flexion of the trunk (flexion of thoracic and lumber spine), while it works by drawing pubic symphysis and sternum toward each other. Tense the anterior wall of the abdomen and assist in compressing the contents of the abdomen.
Where is your rectus abdominis located?
abdomen
Rectus abdominis: This pair of muscles goes down the middle of your abdomen from your ribs to the front of your pelvis. The muscles hold your internal organs in place and keep your body stable during movement. The rectus abdominis may form bumps sometimes called a “six-pack” when someone has a trim, fit abdomen.
What are the 4 layers of abdominal muscles?
Classically the anterolateral abdominal wall has been described as separate layers from superficial to deep as follows:
- Skin.
- Subcutaneous tissues (further divided into the more superficial Camper’s fascia and the deeper Scarpa’s fascia)
- External oblique muscle.
- Internal oblique muscle.
- Transversus abdominis muscle.
What are the 4 main abdominal muscles?
There are five main muscles in the abdomen:
- External obliques.
- Internal obliques.
- Pyramidalis.
- Rectus abdominis.
- Transversus abdominis.
Where does rectus abdominis attach?
Rectus abdominis muscle
| Rectus abdominis | |
|---|---|
| Origin | Crest of pubic |
| Insertion | costal cartilages of ribs 5-7 Xiphoid process of sternum. |
| Artery | inferior epigastric artery |
| Nerve | segmentally by thoraco-abdominal nerves (T7 to T11) and subcostal (T12) |
Where is the rectus abdominis muscle located?
What is the function of rectus muscle?
The rectus muscles move the eyes about the longitudinal axis of the body, that is, superiorly (upward) or inferiorly (downward), or about a vertical axis, in other words, laterally (backward) or medially (forward), according to their position relative to the eyeball.
Why is it called rectus abdominis?
In Latin, rectus means straight and abdominis means abdominal. Therefore, rectus abdominis simply means straight abdominal, a term which references the structure of this paired muscle. The rectus abdominis muscle is intersected by bands of fibrous connective tissues called tendinous intersections.
