| posterior layer of rectus abdominis sheath | The portion of the sheath of the rectus abdominis muscle that lies posterior to the muscle covering only its upper two-thirds; it is formed by contributions from the aponeuroses of the internal oblique and transversus abdominis muscles; its free inferior margin forms the arcuate line; it is deficient below this, the posterior aspect of the muscle being covered only by transversalis fascia and peritoneum. Synonym: lamina posterior vaginae musculi recti abdominis. (05 Mar 2000) |
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| transversus abdominis | <anatomy, muscle> Origin, seventh to twelfth costal cartilages, lumbar fascia, iliac crest, and inguinal ligament; insertion, xiphoid cartilage and linea alba and, through the conjoint tendon, pubic tubercle and pecten; action, compresses abdominal contents; nerve supply, lower thoracic. Synonym: musculus transversus abdominis, musculus transversalis abdominis, transverse muscle of abdomen. (05 Mar 2000) |
| fascia triangularis abdominis | <anatomy> A triangular fibrous band extending from the aponeurosis of the external oblique to the pubic tubercle of the opposite side. See: aponeurosis of external abdominal oblique muscle. Synonym: ligamentum reflexum, Colles' ligament, fascia triangularis abdominis, reflex ligament, triangular fascia. (05 Mar 2000) |
| lamina anterior vaginae musculi recti abdominis | The portion of the rectus sheath that lies anterior to the muscle, consisting in its upper two-thirds of contributions from the aponeuroses of the external and internal oblique muscles, and in its lower third (below the arcuralt line) of contributions from the aponeuroses of all three muscles of the anterolateral abdominal wall. Synonym: lamina anterior vaginae musculi recti abdominis. (05 Mar 2000) |
| lamina posterior vaginae musculi recti abdominis | The portion of the sheath of the rectus abdominis muscle that lies posterior to the muscle covering only its upper two-thirds; it is formed by contributions from the aponeuroses of the internal oblique and transversus abdominis muscles; its free inferior margin forms the arcuate line; it is deficient below this, the posterior aspect of the muscle being covered only by transversalis fascia and peritoneum. Synonym: lamina posterior vaginae musculi recti abdominis. (05 Mar 2000) |
| linea arcuata vaginae musculi recti abdominis | A crescentic line, not always clearly defined, which marks the lower limit of the posterior layer of the sheath of the rectus abdominis muscle. Synonym: linea arcuata vaginae musculi recti abdominis, Douglas' line, linea saemicircularis, saemicircular line. (05 Mar 2000) |
| ramus nodi atrioventricularis | The atrioventricular branches or the nodal branches, the small arteries supplying the atrioventricular node; they usually arise from the right coronary artery where it starts to descend the posterior interventricular sulcus. Synonym: ramus nodi atrioventricularis, atrioventricular nodal branch, branch to atrioventricular node. (05 Mar 2000) |
| ramus nodi sinuatrialis arteriae coronaria dextra | artery to the sinuatrial (S-A) node |
| medulla nodi lymphatici | The central portion of a node consisting of cordlike masses of lymphocytes, plasma cells, and macrophages in a stroma of reticular fibres separated by lymph sinuses; it reaches the surface of the node at the hilum. Synonym: medulla nodi lymphatici. (05 Mar 2000) |
| cortex nodi lymphatici | The outer portion of the lymph node underneath its capsule, consisting of fibrous trabeculae separating densely packed masses of lymphocytes arranged in nodules and separated from the trabeculae and capsule by lymph sinuses. Synonym: cortex nodi lymphatici. (05 Mar 2000) |
| hilum nodi lymphatici | The depressed area of the surface of a lymph node through which the efferent lymphatics emerge from the medulla and through which blood vessels enter and leave the node. Synonym: hilum nodi lymphatici. (05 Mar 2000) |
| nodi | Plural of nodus. Origin: L. (05 Mar 2000) |
| nodi lymphatici anorectales | An alternate term for pararectal lymph nodes. (05 Mar 2000) |
| nodi lymphatici appendiculares | Nodes along the appendicular vessels in the mesoappendix; they receive afferent vessels from the vermiform appendix and send efferent vessels to the ileocolic lymph nodes. Synonym: nodi lymphatici appendiculares. (05 Mar 2000) |
| nodi lymphatici axillares | Numerous nodes around the axillary veins which receive the lymphatic drainage from the upper limb, scapular region and pectoral region (including mammary gland); they drain into the subclavian trunk. Synonym: nodi lymphatici axillares, axillary glands. (05 Mar 2000) |