External abdominal oblique muscle (Musculus obliquus externus abdominis) External abdominal oblique is a paired muscle located on the lateral sides of the abdominal wall. Along with internal abdominal oblique and transversus abdominis, it comprises the lateral abdominal muscles.
What is the antagonist of the internal obliques?
The internal oblique performs two basic functions. It is an antagonist (opposing muscle) to the diaphragm, compressing the thoracic cavity to drive voluntary exhalation.
What does the internal abdominal oblique do?
Function. Along with other abdominal wall muscles, the internal oblique muscle flexes and bends the trunk, assists forced expiration by depressing the lower ribs, and helps to maintain intra-abdominal pressure in defecation, micturition and childbirth.
What does transversus abdominis do?
Along with other core muscles, the main roles of the transverse abdominis are to protect internal organs by holding them in place, and to support the torso by maintaining abdominal wall tension which stabilizes the spine and pelvis before any movement of the limbs can occur.
What is the function of the Obliquus Externus in a frog?
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 causes oblique muscle pain?
They can be caused by: Sports trauma. Over-use of the abdominal muscles such as in cases of over-training in the gym, repeated sit-ups, or sports that involve a lot of oblique muscle strength. Blunt trauma such as an impact in martial arts or boxing.
What is rectus abdominis antagonist?
Antagonist Muscles These muscles are found on the opposite side of the body, commonly referred to as the ab muscles. The most popular abdominal muscle is the rectus abdominis. Since the transversus abdominis, external oblique, and rectus abdominis flex your back, they are antagonists to your back extensor muscles.
Is rectus abdominis an antagonist or agonist?
In general, the agonist and antagonist muscles of some body segment act simultaneously during human motion. For example, the rectus abdominis usually acts as an antagonist muscle to the erector spinae that acts as an agonist muscle during trunk expansion.
What does oblique mean in anatomy?
(ō-blēk′, ə-blēk′) adj. Anatomy Situated in a slanting position; not transverse or longitudinal: oblique muscles or ligaments.
Where is your oblique?
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 is TVA in body?
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 (layered below) the internal oblique muscle.
Why is it called transverse abdominis?
The Transversus abdominis (Transversalis muscle), so called from the direction of its fibers, is the most internal of the flat muscles of the abdomen, being placed immediately beneath the Obliquus internus.
What is the Obliquus externus abdominis?
Description: The Obliquus externus abdominis ( External or descending oblique muscle ), situated on the lateral and anterior parts of the abdomen, is the largest and the most superficial of the three flat muscles in this region.
What is the external oblique muscle?
External oblique – Musculus obliquus externus abdominis. The Obliquus externus abdominis ( External or descending oblique muscle ), situated on the lateral and anterior parts of the abdomen, is the largest and the most superficial of the three flat muscles in this region. It is broad, thin, and irregularly quadrilateral,…
What muscles make up the lateral abdominal wall?
Along with internal abdominal oblique and transversus abdominis, it comprises the lateral abdominal muscles. In a broader picture, these muscles make up the anterolateral abdominal wall together with two anterior abdominal muscles; the rectus abdominis and pyramidalis .
What are the signs and symptoms of Obliquus externus?
—The Obliquus externus may show decrease or doubling of its attachments to the ribs; addition slips from lumbar aponeurosis; doubling between lower ribs and ilium or inguinal ligament. Rarely tendinous inscriptions occur.
