| LSR | lanthanide shift reagent; lecithin/ sphingomyelin ratio; left superior rectus [muscle]; liver/spleen... |
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| mAD, MADA | muscle adenylate deaminase; myoadenylate deaminase |
| MAMC | mean arm muscle circumference |
| MAP | malignant atrophic papulosis; mandibular angle plane; maturation-activated protein; maximal aerobic ... |
| MAPA | muscle adenosine phosphoric acid |
| marginal part of orbicularis oris muscle | <anatomy> The part of the orbicularis oris muscle located in the margin of the lips, i.e., the red area. Synonym: pars marginalis musculi orbicularis oris. (05 Mar 2000) |
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| vertical muscle of tongue | An intrinsic muscle of the tongue, consisting of fibres that pass from the aponeurosis of the dorsum to the aponeurosis of the inferior surface; action, decreases the superior to inferior dimension of (flattens) the tongue; nerve supply, hypoglossal for motor, lingual for sensory. Synonym: musculus verticalis linguae. (05 Mar 2000) |
| rectococcygeal muscle | <anatomy> A band of smooth muscle fibres passing from the posterior surface of the rectum to the anterior surface of second or third coccygeal segment. Synonym: musculus rectococcygeus, rectococcygeal muscle. (05 Mar 2000) |
| rectococcygeus muscle | <anatomy> A band of smooth muscle fibres passing from the posterior surface of the rectum to the anterior surface of second or third coccygeal segment. Synonym: musculus rectococcygeus, rectococcygeal muscle. (05 Mar 2000) |
| rectourethralis muscle | <anatomy> Smooth muscle fibres that pass forward from the longitudinal muscle layer of the rectum to the membranous urethra in the male. Synonym: musculus rectourethralis, rectourethral muscle. (05 Mar 2000) |
| rectourethral muscle | <anatomy> Smooth muscle fibres that pass forward from the longitudinal muscle layer of the rectum to the membranous urethra in the male. Synonym: musculus rectourethralis, rectourethral muscle. (05 Mar 2000) |
| masseter muscle | <anatomy> A masticatory muscle whose action is closing the jaws. (12 Dec 1998) |
| rectouterine muscle | <anatomy> A band of fibrous tissue and smooth muscle fibres passing between the cervix of the uterus and the rectum in the rectouterine fold, on either side. Synonym: musculus rectouterinus. (05 Mar 2000) |
| rectovesicalis muscle | <anatomy> Smooth muscle fibres in the sacrogenital fold in the male; they correspond to rectouterinus musculus. Synonym: musculus rectovesicalis, rectovesical muscle. (05 Mar 2000) |
| rectovesical muscle | <anatomy> Smooth muscle fibres in the sacrogenital fold in the male; they correspond to rectouterinus musculus. Synonym: musculus rectovesicalis, rectovesical muscle. (05 Mar 2000) |
| rectus abdominis muscle | <anatomy> Muscle of ventral abdominal wall, flanking the linea alba, and characterised by tendinous intersections separating its length into multiple bellies; origin, crest and symphysis of the pubis; insertion, xiphoid process and fifth to seventh costal cartilages; action, flexes lumbar vertebral column, draws thorax downward toward pubis; nerve supply, thoracoabdominal nerves. Synonym: musculus rectus abdominis, rectus muscle of abdomen. (05 Mar 2000) |
| rectus muscle of abdomen | <anatomy> Muscle of ventral abdominal wall, flanking the linea alba, and characterised by tendinous intersections separating its length into multiple bellies; origin, crest and symphysis of the pubis; insertion, xiphoid process and fifth to seventh costal cartilages; action, flexes lumbar vertebral column, draws thorax downward toward pubis; nerve supply, thoracoabdominal nerves. Synonym: musculus rectus abdominis, rectus muscle of abdomen. (05 Mar 2000) |
| rectus muscle of thigh | <anatomy, muscle> Origin, anterior inferior spine of ilium and upper margin of acetabulum; insertion, via common tendon of quadriceps femoris into patella, and via patellar ligament to tibial tuberosity. Synonym: musculus rectus femoris, rectus muscle of thigh. (05 Mar 2000) |
| red muscle | Slow-twitch muscle in which small dark "red" muscle fibres predominate; myoglobin is abundant and great numbers of mitochondria occur, characterised by slow, sustained (tonic) contraction. Contrast with white muscle. (05 Mar 2000) |
| Casser's perforated muscle | <anatomy> Relating to the coracoid process of the scapula and the arm. <muscle> Origin, coracoid process of scapula; insertion, middle of medial border of humerus; action, adducts and flexes the arm; resists downward dislocation of shoulder joint; nerve supply, musculocutaneous. See: coracobrachial bursa. Synonym: musculus coracobrachialis, Casser's perforated muscle, coracobrachial muscle. (05 Mar 2000) |