| Ranvier, Louise Antoine | <person> Was a Physician and Histologist. Professor in the College of France, Paris. Ranvier's Nodes - short specialised interruptions in the myelin sheath occurring along myelinated nerve fibres. Responsible for saltatory conduction. Lived: 1835-1922. B. Lyons, 1835, d. 1922. (05 Dec 1998) |
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| Ranvier, Louis | <person> French pathologist, 1835-1922. See: Ranvier's crosses, Ranvier's disks, Ranvier's node, Ranvier's plexus, Ranvier's segment. (05 Mar 2000) |
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| Ranvier's crosses | Black or brown figures in the shape of a cross, marking Ranvier's nodes in the longitudinal section of a nerve stained with silver nitrate. (05 Mar 2000) |
| Ranvier's disks | Tactile nerve endings, of cupped disklike form, in the skin. (05 Mar 2000) |
| Ranvier's node | A short interval in the myelin sheath of a nerve fibre, occurring between each two successive segments of the myelin sheath; at the node, the axon is invested only by short, finger-like cytoplasmic processes of the two neighboring Schwann cells or, in the central nervous system, oligodendroglia cells. See: myelin sheath. (05 Mar 2000) |
| ranvier's nodes | Regularly spaced gaps in the myelin sheaths of peripheral axons. Ranvier's nodes allow saltatory conduction, that is, jumping of impulses from node to node, which is faster and more energetically favourable than continuous conduction. (12 Dec 1998) |
| Ranvier's plexus | A subbasal stroma plexus of the cornea. See: stroma plexus. (05 Mar 2000) |
| Ranvier's segment | The portion of a myelinated nerve fibre between two successive nodes. Synonym: interannular segment, internode, Ranvier's segment, segmentum internodale. (05 Mar 2000) |
| 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) |
| Baume, Antoine | <person> French chemist and pharmacist, 1728-1805. See: Baume scale. (05 Mar 2000) |
| Bayle, Antoine | <person> French physician, 1799-1858. See: Bayle's disease. (05 Mar 2000) |
| Bazin, Antoine | <person> French dermatologist, 1807-1878. See: Bazin's disease. (05 Mar 2000) |
| Becquerel, Antoine | <person> French physicist and Nobel laureate, 1852-1908. See: becquerel, Becquerel rays. (05 Mar 2000) |
| Becquerel, Antoine-Henri | <person, radiobiology> French scientist and discoverer of radioactivity, co-winner of Nobel Prize. (See Curie) (13 Nov 1997) |
| Bogros, Antoine | <person> 19th century French anatomist. See: Bogros' serous membrane. (05 Mar 2000) |
| Marfan, Antoine Bernard-Jean | <person> French paediatrician, 1858-1942. See: Marfan's disease, Marfan's law, Marfan's syndrome. (05 Mar 2000) |