Internal oblique origin and insertion

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. Lumbar fascia anterior two thirds of iliac crest andlateral two thirds of inguinal ligament.

The Origin of the Internal Oblique is the anterior two thirds of the Iliac Crest and the Inguinal Ligament.

Internal oblique origin and insertion. 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. Lumbar fascia anterior two thirds of iliac crest andlateral two thirds of inguinal ligament. Costal margin aponeurosis of rectus sheath anteriorand posterior conjoint tendon to pubic crest and pectineal line.

Attachments of Internal Oblique Muscle. Anterior iliac crest lateral half of inguinal ligament and thoracolumbar fascia. Costal cartilages of ribs 8-12.

Abdominal aponeurosis to linea alba. Internal Oblique Origin and Insertion Internal Oblique Origin. The Origin of the Internal Oblique is the anterior two thirds of the Iliac Crest and the Inguinal Ligament.

The Insertion of the Internal Oblique is the inferior border of ribs 10-12 the Linea Alba and the Pubic Crest. The Internal Oblique and External Oblique often work together to. The internal abdominal oblique muscle is located closer to the skin than the transverse abdominal muscle.

This muscle supports the abdominal wall assists in forced respiration aids in. The internal obliques originate on the inguinal ligament which is a ligament that runs from the anterior iliac spine to the pubic bone. Additionally they originate on the anterior iliac crest.

The external obliques however originate on the lower eight ribs. Thirteenth rib and cartilage of the twelfth rib. Compression and support of the abdominal viscera.

Medial branches of the last few intercostales and costoabdominalis iliohypogastricus and ilioinguinalis nerves. Text by Antoine Micheau MD -. The fibers end in a broad aponeurosis which is inserted into the xiphoid process the linea alba the pubic crest and the pectineal line of pubis.

The lower fibers of the muscle fuse with the lowest fibers of the internal oblique to form conjoint tendon. 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. The internal oblique L.

Obliquus oblique is a flat sheet of muscle on either the side of the lower torso. It gets its name from being beneath the external oblique and having an oblique fiber direction relative to the midline. The most prominent actions of the internal oblique are spinal lateral flexion and spinal rotation.

The risk of abdominal hernias is increased when weakness of the internal abdominal oblique or the other abdominal muscles is present. Lateral two-thirds of the inguinal ligament anterior two-thirds of the intermediate line of the iliac crest thoracolumbar fascia. Lower four ribs abdominal aponeurosis of linea alba crest of pubis.

Inguinal ligament anterior iliac crest thoracolumbar aponeurosis. Costal cartilage of lower 4 ribs 9-12 abdominal aponeurosis linea alba. Flexion of the trunk compression and support of abdominal viscera.

They operate in the opposite way to the external oblique muscles. For example twisting the trunk to the left requires the left side internal oblique and the right side external oblique to contract together. The internal abdominal oblique muscle is also a broad thin muscular sheet.

It lies deep to the external oblique muscle. Anterior two-thirds of the iliac crest and. Lateral two-thirds of the inguinal ligament.

Internal Abdominal Oblique Muscle. The internal abdominal oblique is also a broad thin muscular sheet that lies deep to the external oblique. It arises from the thoraco-lumbar fascia the lateral two-thirds of the inguinal ligament and the anterior two-thirds of the iliac crest.

The muscle fibers transmit superomedially and insert into the inferior borders of the. When contracting bilaterally the muscle works together with internal abdominal oblique and rectus abdominis to flex the trunk anteriorly. This activity also increases the tone of abdominal wall and positive intra-abdominal pressure which is a part of various physiological processes.

For example forced exhalation micturition defecation and labor. Lower border of internal oblique and transversus abdominisin inguinal canal. Loops around spermatic cord and tunica vaginalis andsome fibers return to attach to pubic tubercle.

Genital branch L2 of genitofemoral nerve L1 2. Inferior border of 10th-12th ribs linea alba and pubis via c. Thoracoabdominal nn anterior rami of T7-T11 subcostal and f.

Compress and support abdominal viscera flex and rotate trunk. Thoracolumbar fascia anterior two thirds of iliac crest conn. Inguinal ligament Iliac crest and the Lumbodorsal fascia Insertion.

Linea alba Xiphoid process and the inferior ribs. Intercostal nerves T8 T9 T10 T11 subcostal nerveT12 iliohypogastric nerve ilioinguinal nerve Action. Compresses abdomen and rotates vertebral column.

The Obliquus internus abdominis Internal or ascending oblique muscle.