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aponeurosis

aponeurosis , pl. aponeuroses (ap´o-nu-ro´sis, -sez) [NA]

A fibrous sheet or flat, expanded tendon, giving attachment to muscular fibers and serving as the means of origin or insertion of a flat muscle; it sometimes also performs the office of a fascia for other muscles. [G. the end of the muscle where it becomes tendon, fr. apo, from, + neuron, sinew]
bicipital a. , a. bicipita´lis radiating fibers from the tendon of insertion of the biceps which form a triangular band passing obliquely across the hollow of the elbow to the ulnar side and becoming merged into the deep fascia of the forearm. Formerly called "grace Dieu" fascia, it serves to protect the brachial artery and median nerve during phlebotomy of median cubital vein.a. musculi bicipitis brachii [NA] , bicipital fascia, lacertus fibrosus, semilunar fascia;
Denonvilliers' a. rectovesical septum
epicranial a. the aponeurosis or intermediate tendon connecting the frontalis and occipitalis muscles to form the epicranius.a. epicranialis [NA] , galea aponeurotica [NA] , galea (2);
a. epicrania´lis [NA] epicranial a
extensor a. extensor digital expansion
a. of external abdominal oblique muscle broad, flat tendinous portion of the external abdominal oblique muscle. The fleshy fibers of the muscle end in the a. along a line descending vertically from the costochondral joint of the ninth rib then turning laterally just below the level of the umbilicus toward the anterior superior iliac spine. The fibers of the aponeurosis run medially and inferiorly, contributing to the anterior wall of the sheath of the rectus abdominis muscle and decussating with those of the contralateral a. at the median linea alba. Inferomedially, the a. is attached to the upper border of the pubic symphysis, the pubic crest and pubic tubercle. Between the anterior superior iliac spine and the pubic tubercle, it is thickened and turned under, forming the inguinal ligaments. The portion of the a. attached to the pubic bone forms the superficial inguinal ring by splitting into medial and lateral crura. See also external spermatic fascia, inguinal ligament, lacunar ligament, pectineal ligament, reflected inguinal ligament, superficial inguinal ring, rectus sheath.
a. of insertion a tendinous sheet serving for the insertion of a broad muscle.
a. of internal abdominal oblique muscle broad, flat tendinous portion of the internal abdominal oblique muscle. The fleshy fibers of the muscle end in the a. lateral to the semilunar line. The uppermost portion of the a. is attached to the outer surfaces and lower borders of the seventh to ninth costal cartilages. Of the portion extending between the costoxiphoid margin and the pubis, the upper two-thirds splits into anterior and posterior laminae at the lateral border of the rectus abdominis muscle to contribute to the anterior and posterior walls of the sheath of the rectus abdominis muscle as they extend to the midline linea alba. The lower third of the a. does not split but joins the aponeuroses of the external abdominal oblique and transversus abdominis muscles to form the anterior wall of the sheath of the rectus abdominis muscle. The fibers of the portion of the a. contributing to the rectus sheath decussate with those of the contralateral a. in the linea alba. The lowermost portion of the a. blends with the a. of the transversus abdominis muscle to form the conjoint tendon, attaching to the pubic crest and often the pecten pubis, thus forming the posterior wall of the inguinal canal at the superficial inguinal ring. See also cremasteric fascia, conjoint tendon, rectus sheath.
a. of investment a fibrous membrane covering and keeping in place a muscle or group of muscles.
a. lin´guae [NA] lingual a
lingual a. the thickened lamina propria of the tongue to which the lingual muscles attach.a. linguae [NA];
a. mus´culi bicip´itis bra´chii [NA] bicipital a
a. of origin a tendinous expansion serving as the attachment of origin of a broad muscle.
a. palati´na [NA] palatine a
palatine a. the expanded tendons of the tensor veli palatini muscles in the anterior two-thirds of the soft palate to which the other palatine muscles attach.a. palatina [NA];
palmar a. the thickened, central portion of the fascia ensheathing the hand; it radiates toward the bases of the fingers from the tendon of the palmaris longus muscle.a. palmaris [NA] , Dupuytren's fascia, palmar fascia;
a. palma´ris [NA] palmar a
Petit's a. the posterior layer of the broad ligament of the uterus. [P. Petit]
a. pharyn´gea pharyngobasilar fascia
plantar a. the very thick, central portion of the fascia investing the plantar muscles; it radiates toward the toes from the medial process of the calcaneal tuberosity and gives attachment to the short flexor muscle of the toes.a. plantaris [NA] , plantar fascia;
a. planta´ris [NA] plantar a
Sibson's a. suprapleural membrane
temporal a. temporal fascia
thoracolumbar a. thoracolumbar fascia
a. of vastus muscles See patellar retinaculum, medial patellar retinaculum, lateral patellar retinaculum.

 

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