| node of Ranvier | <anatomy, physiology> A region of exposed neuronal plasma membrane in a myelinated axon. Nodes contain very high concentrations of voltage gated ion channels and are the site of propagation of action potentials by saltatory conduction. (18 Nov 1997) |
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| node of Rouviere | One of the lateral group of retropharyngeal lymph nodes. See: retropharyngeal lymph nodes. (05 Mar 2000) |
| node, sa | Sinoatrial node. The pacemaker of the heart, located in the right atrium (upper chamber of the heart). The electrical signals initiated in the sa node are transmitted throuhg the atria and the ventricles to stimulate heart muscle contractions (heartbeats). (12 Dec 1998) |
| subpyloric node | A group of lymph nodes located below the pylorus. Synonym: nodi subpylorici, subpyloric node. (05 Mar 2000) |
| suprapyloric node | A lymph node located above the pylorus. Synonym: nodus suprapyloricus, suprapyloric node. (05 Mar 2000) |
| delphian node | A midline prelaryngeal lymph node, adjacent to the thyroid gland, enlargement of which is indicative of thyroid disease or early metastasis from the subglottic larynx. (05 Mar 2000) |
| intermediate lacunar node | A lymph node of the external iliac group located between the external iliac artery and vein at the vascular lacuna. Synonym: nodus lacunaris intermedius, intermediate lacunar node. (05 Mar 2000) |
| Osler node | A tender cutaneous lesion, probably of immunopathic origin, characteristic of subacute bacterial endocarditis; small, raised, and discolored, these node's usually appear in the pads of fingers or toes. (05 Mar 2000) |
| Tawara's node | <cardiology> The location in the heart's conduction system, between the atria and the ventricles, which conducts the normal electrical impulse from the atria to the ventricles. (27 Sep 1997) |
| Troisier's node | Historic term for a lymph node immediately above the clavicle, especially on the left side, that is palpably enlarged as the result of a metastasis from a malignant neoplasm; the presence of such a node indicates that the probable site of primary involvement is in an abdominal organ. See: signal node. Synonym: Troisier's node. (05 Mar 2000) |
| jugulodigastric node | A prominent lymph node in the deep lateral cervical group lying below the digastric muscle and anterior to the internal jugular vein; it receives lymphatic drainage from the pharynx, palatine tonsil, and tongue. Synonym: nodus jugulodigastricus, jugulodigastric node, subdigastric node. (05 Mar 2000) |
| jugulo-omohyoid node | A lymph node of the lateral deep cervical group that lies above the intermediate tendon of the omohyoid muscle and anterior to the internal jugular vein; it receives lymphatic drainage from the submental, submandibular, and deep anterior cervical nodes; its efferent vessels go to other deep lateral cervical nodes. Synonym: nodus jugulo-omohyoideus, jugulo-omohyoid node. (05 Mar 2000) |
| Keith and Flack node | sinoatrial node |
| Keith's node | sinoatrial node |
| Koch's node | sinoatrial node |