| MFB | medial forebrain bundle; metallic foreign body |
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| NVB | neurovascular bundle |
| PMB | papillomacular bundle; para-hydroxymercuribenzoate; polychrome methylene blue; polymorphonuclear bas... |
| RB | radiation burn; rating board; rebreathing; reticulate body; retinoblastoma; right bronchus; right bu... |
| RBB | right bundle branch |
| lateral anterior thoracic nerve | <anatomy, nerve> A nerve that arises from the lateral cord of the brachial plexus usually passing medial to pectoralis minor to supply the sternoclavicular head of pectoralis major. Synonym: nervus pectoralis lateralis, lateral anterior thoracic nerve. (05 Mar 2000) |
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| lateral aperture of the fourth ventricle | One of the two lateral openings of the fourth ventricle into the subarachnoid space at the cerebellopontine angle. Synonym: apertura lateralis ventriculi quarti, foramen lateralis ventriculi quarti, foramen of Key-Retzius, foramen of Luschka, Retzius' foramen. (05 Mar 2000) |
| lateral arcuate ligament | <anatomy> One of Haller's arches; a thickening of the fascia of the quadratus lumborum muscle between the transverse process of the first lumbar vertebra and the twelfth rib on either side that gives attachment to a portion of the diaphragm. Synonym: ligamentum arcuatum laterale, arcus lumbocostalis lateralis, lateral lumbocostal arch. (05 Mar 2000) |
| lateral atlantoaxial joint | A condylar synovial joint between the inferior articular facets of the atlas and the superior articular facets of the axis. Synonym: articulatio atlantoaxialis lateralis, lateral atlantoepistrophic joint. (05 Mar 2000) |
| lateral atlantoepistrophic joint | A condylar synovial joint between the inferior articular facets of the atlas and the superior articular facets of the axis. Synonym: articulatio atlantoaxialis lateralis, lateral atlantoepistrophic joint. (05 Mar 2000) |
| lateral atrial vein | A vein draining deep portions of the temporal and parietal lobes; it runs in the lateral wall of the lateral ventricle to terminate in the superior thalamostriate vein. Synonym: vena ventriculi lateralis lateralis, lateral atrial vein, lateral vein of lateral ventricle. (05 Mar 2000) |
| lateral basal branch | Lateral basal branch of the following: 1) basal part of inferior lobar branch of right pulmonary artery; 2) basal part of inferior lobar branch of left pulmonary artery. Synonym: ramus basalis lateralis. (05 Mar 2000) |
| lateral basal segment | Lateral basal segment of inferior lobe of right and left lung; between anterior and posterior basal segments. Synonym: segmentum basale laterale. (05 Mar 2000) |
| lateral bicipital groove | at the cubital fossa, the groove separating the biceps brachii and brachialis muscles on the lateral side. Synonym: sulcus bicipitalis lateralis. (05 Mar 2000) |
| lateral border | The margin or edge of a structure which is farthest from the midline. Synonym: margo lateralis, lateral margin. (05 Mar 2000) |
| lateral border of foot | The border of the foot between the small toe and the heel. Synonym: margo lateralis pedis, margo fibularis pedis, fibular margin of foot. (05 Mar 2000) |
| lateral border of forearm | An imaginary line running along the outermost extent of the forearm separating anterior and posterior surfaces laterally. Synonym: margo lateralis antebrachii, margo radialis antebrachii, radial border of forearm. (05 Mar 2000) |
| lateral border of humerus | The ridge on the humerus that extends from the greater tubercle to the lateral epicondyle. Synonym: margo lateralis humerii. (05 Mar 2000) |
| lateral border of kidney | The convex narrow edge separating the anterior and posterior surfaces. Synonym: margo lateralis renis. (05 Mar 2000) |
| lateral border of nail | The sides of the nail extending from the proximal to the free borders. Synonym: margo lateralis unguis. (05 Mar 2000) |