What is an aponeurosis of external oblique?
The aponeurosis of the external oblique runs down the center of the abdomen, starting at the bottom of the ribs and ending at the pubis. It’s part of the sheath of the rectus abdominis and runs crosswise to attach the obliques to the other abdominal muscles.
How is the aponeurosis of external oblique arranged?
It arises, by eight fleshy digitations, from the external surfaces and inferior borders of the lower eight ribs; these digitations are arranged in an oblique line which runs downward and backward, the upper ones being attached close to the cartilages of the corresponding ribs, the lowest to the apex of the cartilage of …
Where is aponeurosis located?
Aponeuroses are connective tissues found on the surface of pennate muscles and are in close association with muscle fascicles. In addition to transmitting muscle forces to the external tendon, aponeurosis has been hypothesized to influence the direction of muscle shape change during a contraction.
How is the aponeurosis of external oblique arranged at superficial inguinal ring?
The superficial inguinal ring (subcutaneous inguinal ring) (figs. 601, 602) is an interval in the aponeurosis, just above and lateral to the crest of the pubis. The aperture is somewhat triangular in form, and its direction is oblique, corresponding with the course of the fibers of the aponeurosis.
Where are the internal and external obliques located?
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.
What is the origin of external oblique?
Gross anatomy The external oblique muscle arises from the outer surface of the middle of the shaft of the lower six ribs as fleshy fibers. At its origin upper four slips and lower four slips interdigitate with the serratus anterior and the latissimus dorsi muscles respectively.
What is the aponeurosis anatomy?
Aponeurosis, a flat sheet or ribbon of tendonlike material that anchors a muscle or connects it with the part that the muscle moves. The aponeurosis is composed of dense fibrous connective tissue containing fibroblasts (collagen-secreting spindle-shaped cells) and bundles of collagenous fibres in ordered arrays.
What does Aponeurotic mean?
ap·o·neu·ro·sis (ăp′ə-no͝o-rō′sĭs, -nyo͝o-) pl. ap·o·neu·ro·ses (-sēz′) A sheetlike fibrous membrane, resembling a flattened tendon, that serves as a fascia to bind muscles together or as a means of connecting muscle to bone.