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

How do abdominal muscles work?

The muscles of the abdominal walls perform a variety of functions: (1) They provide a tonic, elastic muscular support for the viscera and, by their recoil, pull down the rib cage in expiration. (2) They contract against blows to form a rigid protective wall for the viscera.

What is the action of the rectus abdominis?

Function. The main action for rectus abdominis is flexion of the trunk (flexion of thoracic and lumber spine), while it works by drawing symphysis and Sternum toward each other. Also, it works on posterior pelvic tilt with other abdominal muscles.

What is the action of the rectus abdominis muscle quizlet?

The tendinous intersections are found in what muscle? How does the action of the rectus abdominis differ from the other abdominal muscles? Is the below answer correct? The rectus abdominis flexes the vertebral column in addition to compressing the abdominal wall.

What are abdominals?

The abdominal muscles are located between the ribs and the pelvis on the front of the body. The abdominal muscles support the trunk, allow movement and hold organs in place by regulating internal abdominal pressure.

What is the action of the external abdominal oblique muscle?

The external oblique functions to pull the chest downwards and compress the abdominal cavity, which increases the intra-abdominal pressure as in a valsalva maneuver. It also performs ipsilateral (same side) side-bending and contralateral (opposite side) rotation.

What does the rectus abdominis do quizlet?

What is the action of rectus abdominis? Flexes trunk and compresses abdominal viscera.

What is the function of the abdomen?

The abdominal muscles support the trunk, allow movement and hold organs in place by regulating internal abdominal pressure. The deep abdominal muscles, together with muscles in the back, make up your ‘core’ muscles and help keep your body stable and balanced, and protects your spine.

What is the main function of the rectus abdominis muscle quizlet?

The rectus abdominis flexes the vertebral column in addition to compressing the abdominal wall. The other abdominal muscles compress the abdominal wall and laterally rotate the trunk.

What are the functions of the abdominal muscles?

The abdominal muscles support the trunk, allow movement and hold organs in place by regulating internal abdominal pressure. The deep abdominal muscles, together with muscles in the back, make up your core muscles. Your core muscles help keep your body stable and balanced, and protect your spine.

Why are anterior abdominal muscles called rectus abdominis?

They are one of the two pairs of muscles that contribute to the anterior abdominal wall. The name ‘rectus abdominis’ means ‘straight abdominal’, and is indicative of the parallel direction the fibres of the muscle take as they pass from their origin to their point of insertion.

How does the rectus abdominis muscle support the thorax?

Furthermore, they support the exhalation by pulling down the thorax through their contraction (expiratory breathing muscles). In particular, the rectus abdominis muscle does a ventral flexion (flexion of the trunk or erection of the pelvis) and thus is an important antagonist of the intrinsic back muscles.

What do you need to know about rectus abdominis?

These infomercials are filled with the empty promise that you will quickly get a ”six-pack” set of abs, a muscle that has the scientific name of rectus abdominis. The rectus abdominis causes the rib cage and pelvis to tilt inward towards the abdomen.