Which muscles compress the abdomen quizlet?

The internal oblique muscle compresses the abdominal wall.

Do the abdominal oblique muscles compress the abdomen?

Anterolateral Abdominal Wall Muscles

Internal obliques directed superiomedially perpendicular to the external obliques it acts unilaterally for ipsilateral trunk rotation and side flexion and bilaterally to compress the abdominal viscera, pushing them up into the diaphragm, resulting in a forced expiration.

Which muscle do you contract when you compress the anterior abdominal wall quizlet?

When the internal obliques and transversus abdominis contract, the thoracolumbar fascia is pulled on, compressing the back muscles. This provides support for the back and has a “corset-like” effect.

What muscle is the abdominal muscle?

rectus abdominis
abdominal muscle, any of the muscles of the anterolateral walls of the abdominal cavity, composed of three flat muscular sheets, from without inward: external oblique, internal oblique, and transverse abdominis, supplemented in front on each side of the midline by rectus abdominis.

What are the 4 abdominal muscles?

What are the abdominal muscles?
  • External obliques.
  • Internal obliques.
  • Pyramidalis.
  • Rectus abdominis.
  • Transversus abdominis.

Does the diaphragm compress the abdomen?

During inhalation, the diaphragm contracts, so that its center moves caudally (downward) and its edges move cranially (upward). This compresses the abdominal cavity, raises the ribs upward and outward and thus expands the thoracic cavity.

What muscles protect the abdominal viscera?

Terms in this set (5)
  • Rectus Abdominis. Origin: Pubic Crest and pubic symphysis. …
  • External Oblique. Origin: Ribs 5-12. …
  • Internal Oblique. Origin: Iliac crest, inguinal ligament, and thoracolumbar fascia. …
  • Transversus Abdominis. Origin: Iliac crest, inguinal ligament, lumbar fascia, and cartilages of ribs 5-10. …
  • Quadratus Lumborum.

Which muscle compresses the abdominal viscera during forced expiration?

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

Do the abdominal muscles compress and protect the viscera?

These anterolateral abdominal muscles help contain and protect the abdominal viscera. … Additionally, they compress the abdomen during forced exhalation and produce the force required for defecation, urination, and childbirth.

Which muscles form and protect the abdominal cavity quizlet?

external oblique, internal oblique & transversus abdominis.

What is abdominal oblique?

Internal abdominal oblique is a muscle found on the lateral side of the abdomen. It is broad and thin. it forms one of the layers of the lateral abdominal wall along with external oblique on the outer side and transverse abdominis on the inner side. Its fibers are obliquely oriented hence the name.

Which of the following muscles compresses the abdomen and flex the vertebral column?

Rectus abdominis
Name of Muscle Action
External abdominal oblique Compression of abdomen, flexion and rotation of vertebral column
Internal abdominal oblique Compression of abdomen, flexion and rotation of vertebral column
Transversus abdominis Compression of abdomen
Rectus abdominis Compression of abdomen and flexion of vertebral column

Which muscles flex the torso?

Rectus abdominis flexes the trunk. If you shorten the front of the body and round forward (just like you do in the abdominal crunch), you will feel it working. We shouldn’t do too much of that without balancing it out with other actions. Erector spinae muscles extend the spine.

What are oblique muscles?

The oblique muscles consist of external oblique muscle and internal oblique muscle. They are a group of muscles of the abdomen (belly) acting together forming a firm wall. … Invertebrates, the abdomen is a large body cavity enclosed by layers of the muscular wall at the front and sides.

What are the internal oblique muscles?

The internal oblique muscle is a muscle that is found at each side of the body, just lateral to the abdomen. The word ‘oblique’ means ‘diagonal’ or ‘slanted’, which is a reference to the slanted direction that the muscle fibers of this muscle run up the sides of the body.

Where is the oblique muscle in the body?

The external oblique is situated on the lateral and anterior parts of the abdomen. It is broad, thin, and irregularly quadrilateral, its muscular portion occupying the side, its aponeurosis the anterior wall of the abdomen.

What does the external abdominal oblique do?

Function. The external obliques on either side: Help rotate the trunk. Bilateral contraction of EO along with rectus abdominis and internal oblique flexes the trunk by drawing the pubis towards the xiphoid (like in crunches or sit-ups)

Which muscle rotates the trunk and compresses the abdomen?

Contraction of transversus abdominis compresses the abdominal organs, assists expiration and causes ipsilateral trunk rotation.

Which is an action of the internal abdominal oblique?

Upon bilateral contraction, the internal abdominal oblique flexes the trunk. Simultaneously, it causes compression of the intra-abdominal viscera thereby increasing the intra-abdominal pressure. This action is utilized for functions such as forced expiration, micturition, defecation etc.