| MRBF | mean renal blood flow |
|---|---|
| MRD | maximum rate of depolarization; measles-rindenpest-distemper [virus group]; medical records departme... |
| MRF | Markov random field; medical record file; melanocyte-[stimulating hormone]-releasing factor; mesence... |
| MRI | machine-readable identifier; magnetic resonance imaging; medical records information; Medical Resear... |
| MRN | malignant renal neoplasm |
| plexus | A network or tangle, a general term for a network of lymphatic vessels, nerves or veins. (18 Nov 1997) |
|---|---|
| plexus annularis | A nerve plexus near the corneoscleral junction from which myelinated and unmyelinated nerves pass to the cornea. Synonym: plexus annularis. (05 Mar 2000) |
| plexus aorticus | A plexus of lymph nodes and connecting vessels lying along the lower portion of the abdominal aorta. Synonym: plexus aorticus. (05 Mar 2000) |
| plexus aorticus abdominalis | <anatomy, neurology> An autonomic plexus surrounding the abdominal aorta, directly continuous with the thoracic aortic plexus above and continued inferior to the bifurcation of the aorta as the superior hypogastric plexus. Synonym: plexus aorticus abdominalis. (05 Mar 2000) |
| plexus aorticus thoracicus | Areolar venous plexus, a venous plexus in the areola surrounding the nipple, formed by the mammary veins, and sending its blood to the lateral thoracic vein. Synonym: plexus venosus areolaris, circulus venosus halleri, Haller's circle, vascular circle, venous circle of mammary gland, thoracic aortic plexus. (05 Mar 2000) |
| plexus arteriae cerebri anterioris | <anatomy, artery> An autonomic plexus accompanying the anterior cerebral artery, derived from the internal carotid plexus. Synonym: plexus arteriae cerebri anterioris. (05 Mar 2000) |
| plexus arteriae cerebri mediae | <anatomy, artery> An autonomic plexus accompanying the middle cerebral artery, derived from the internal carotid plexus. Synonym: plexus arteriae cerebri mediae. (05 Mar 2000) |
| plexus arteriae choroideae | <anatomy, artery> An autonomic plexus accompanying the artery of the same name, derived from the internal carotid plexus. Synonym: plexus arteriae choroideae. (05 Mar 2000) |
| plexus auricularis posterior | An autonomic plexus on the artery of this name, derived from the external carotid plexus. Synonym: plexus auricularis posterior. (05 Mar 2000) |
| plexus autonomici | Plexus's of nerves in relation to blood vessels and viscera, the component fibres of which are sympathetic, parasympathetic, and sensory. Synonym: plexus autonomici. (05 Mar 2000) |
| plexus axillaris | A lymphatic plexus formed of the lymph nodes, with their afferent and efferent vessels, in the axilla. Synonym: plexus axillaris. (05 Mar 2000) |
| plexus basilaris | A venous plexus on the clivus, connected with the cavernous and petrosal sinuses and the internal vertebral (epidural) venous plexus. Synonym: plexus basilaris, basilar sinus. (05 Mar 2000) |
| plexus brachialis | A network of lower cervical and upper dorsal spinal nerves supplying the arm, forearm and hand. (27 Sep 1997) |
| plexus cardiacus | A wide-meshed network of anastomosing cardiopulmonary and splanchnic nerves arising from the afferent and autonomic nerve fibres (sympathetic) and vagus (parasympathetic) nerves, surrounding the arch of the aorta, the pulmonary artery, and continuing to the atria, ventricles, and coronary vessels. Synonym: plexus cardiacus. (05 Mar 2000) |
| plexus cardiacus profundus | The deeper part of the cardiac plexus. Synonym: plexus cardiacus profundus. (05 Mar 2000) |