what is the origin of the transversus abdominis muscle

Transverse abdominal muscle origin

Iliac crest, inguinal ligament, thoracolumbar fascia, and costal cartilages 7-12

Full Answer

What is the origin of the transversus abdominis?

Origin and insertion The transversus abdominis has several origin points: Lateral one-third of the superior surface of the inguinal ligament and the associated iliac fascia Anterior two-thirds of the inner lip of iliac crest

What is the transverse abdominal muscle?

The transverse abdominal muscle, also known as the transverse abdominis, transversalis muscle and transversus abdominis muscle, is a muscle layer of the anterior and lateral abdominal wall which is deep to the internal oblique muscle. It is thought by most fitness instructors to be a significant component of the core.

Can transversus abdominis cause abdominal hernia?

Additionally, weakness of transversus abdominis or other abdominal muscles increases the risk for abdominal hernias. The lateral abdominal muscles, including transversus abdominis, also cause compression of the intra-abdominal viscera thereby increasing the intra-abdominal pressure.

What is the transversus abdominis aponeurosis?

The transversus abdominis aponeurosis makes up the posterior wall of the rectus sheath which covers the posterior upper three quarters of rectus abdominis, together with the aponeurosis of the internal abdominal oblique muscle.

What is the origin and insertion of the transversus abdominis?

The transversus abdominis originates from the costal margin, thoracolumbar fascia, iliac crest, and inguinal ligament. This muscle then inserts onto the linea alba, pubic symphysis, and xiphoid process.

Which is the origin of the transversus abdominis muscle quizlet?

Origin: thoracolumbar fascia; inguinal ligament; costal cartilages of inferior six ribs; iliac crest. Insertion: linea alba; pubic crest. Action: increases the intraabdominal pressure during forced expiration. Innervation: thoraco-abdominal nerves (anterior rami of T7-T11), subcostal nerve, and first lumbar nerve.

Where is the transversus abdominis muscle?

abdomenThe transverse abdominis is located in the abdomen immediately inside of the internal oblique muscle. It is one of the innermost muscles of the abdomen and it arises from the inguinal ligament, iliac crest, the inner surfaces of the lower six ribs and from the thoracolumbar fascia.

What is the origin for the abdominals?

Rectus abdominis muscleOriginPubic symphysis, pubic crestBlood supplyInferior epigastric and superior epigastric arteries; contributions from posterior intercostal, subcostal and deep circumflex arteriesFunctionTrunk flexion, compresses abdominal viscera, expiration2 more rows

What is the origin and insertion of the internal oblique muscle?

From these points of origin, the internal oblique runs diagonally up the side of the body and inserts onto the costal cartilage of the eighth through twelfth ribs and the linea alba.

What is the origin of internal obliques?

Abdominal internal oblique muscleOriginInguinal ligament, Iliac crest and the Lumbodorsal fascia.InsertionLinea alba, Pectineal Line of Pubis (via Conjoint tendon) and ribs 10-12.ArterySubcostal arteries.NerveThoracoabdominal nn. (T7-T11), Subcostal n. (T12), Iliohypogastric n. (L1) and Ilioinguinal n. (L1)10 more rows

What is the insertion of the transversus abdominis?

Transverse abdominal muscleThe Transversus abdominis, Rectus abdominis, and Pyramidalis.DetailsOriginIliac crest, inguinal ligament, thoracolumbar fascia, and costal cartilages 7-12InsertionXiphoid process, linea alba, pubic crest and pecten pubis via conjoint tendon10 more rows

What are its attachments of transversus abdominis?

Attachments of Transversus Abdominis Muscle: Origin & Insertion. a. Anterior iliac crest, lateral half of inguinal ligament, thoracolumbar fascia and cartilages of ribs 6-12.

Why is it called transversus abdominis?

What does the name transverse abdominis muscle mean? Transverse means across. Abdominis comes from the Latin word abdere which means to stow away. From this then you get an idea that the abdominals, in general, function to “stow away” contents (the digestive organs).

Which attachment superior or inferior is the origin and which is the insertion?

The origin is the attachment site that doesn't move during contraction, while the insertion is the attachment site that does move when the muscle contracts. The insertion is usually distal, or further away, while the origin is proximal, or closer to the body, relative to the insertion.

What is the root word for abdominal?

abdominal. Prefix: Prefix Definition: 1st Root Word: abdomin/o. 1st Root Definition: abdomen.

What is the correct order of abdominal muscles from deep to superficial?

3 flat muscles on the anterolateral side arranged from superficial to deep; external abdominal oblique, internal abdominal oblique, transversus abdominis.

What is the transverse abdominal muscle?

The transverse abdominal, so called for the direction of its fibers, is the innermost of the flat muscles of the abdomen. It is positioned immediately inside of the internal oblique muscle .

Why do we use the transverse abdominal?

The transverse abdominal helps to compress the ribs and viscera, providing thoracic and pelvic stability. This is explained further here. The transverse abdominal also helps a pregnant woman to deliver her child.

What is the T6-T11?

Thoracoabdominal nn. (T6-T11), Subcostal n. (T12), iliohypogastric nerve (L1), and ilioinguinal nerve (L1). The transverse abdominal muscle (TVA), also known as the transverse abdominis, transversalis muscle and transversus abdominis muscle, is a muscle layer of the anterior and lateral (front and side) abdominal wall which is deep to ...

What is the transverse rectus abdominius flap?

The transverse rectus abdominius muscle flap is a free flap used for breast reconstruction surgery. A segment of the muscle is incised and raised along with the perforating inferior epigastric artery and anastomosed with branches of the internal mammary/ internal thoracic artery. Nowadays, the deep inferior epigastric artery perforator flap (skin, fascia and fat only i.e. no muscle) has replaced the TRAM flap as it requires less recovery time.

What is the abs muscle?

Rectus abdominis , informally known as the abs muscle, is a long muscle of the anterior abdominal wall. In those with low body fat, it is clearly visible beneath the skin forming the ‘six pack’. It extends from the rib cage all the way to the pubic bone.

What is the blood supply to the rectus abdominis muscle?

Blood supply. The blood supply to the rectus abdominis muscle arises from a number of vessels, but predominantly the inferior and superior epigastric arteries . In addition, small terminal branches of the lower three posterior intercostal arteries, subcostal and deep circumflex artery also provide some contribution.

What is the relationship between the rectus abdominis and the rectus sheath?

Relations. The rectus abdominis muscle itself lies within the rectus sheath, which is formed by the merging of the aponeurosis of transversus abdominis, external and internal oblique abdominal muscles.

What are the three abdominal muscles?

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 .

How many tendinous intersections are there in the rectus abdominis muscle?

Finally, there are three tendinous intersections in the rectus abdominis muscle. One of these horizontal intersections is present at the level of umbilicus, another at the level of xiphoid process and the third mid way between them.

What nerves innervate the rectus abdominis?

Innervation. The rectus abdominis muscle is innervated by the thoracoabdominal nerves, which enter the rectus sheath by piercing its anterior surface. They pass between the transversus abdominis and internal oblique muscle layers, and pierce the sheath of the rectus abdominis muscle.