| sympathicectomy | <procedure, surgery> Excision of a sympathetic nerve. Occasionally used for the treatment of reflex sympathetic dystrophy. (27 Sep 1997) |
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| sympathicoblast | A primitive cell derived from the neural crest glia; with the pheochromoblasts, sympathoblast's enter into the formation of the adrenal medulla and sympathetic ganglia. Synonym: sympathetoblast, sympathicoblast. Origin: sympatho-+ G. Blastos, germ (05 Mar 2000) |
| sympathicoblastoma | <tumour> Obsolete term for neuroma. (05 Mar 2000) |
| sympathicogonioma | <tumour> Obsolete term for neuroma. (05 Mar 2000) |
| sympathicolytic | Denoting antagonism to or inhibition of adrenergic nerve activity. See: adrenergic blocking agent, antiadrenergic. Synonym: sympathicolytic. Origin: sympatho-+ G. Lysis, a loosening (05 Mar 2000) |
| sympathicomimetic | 1. <physiology> The mimicking the effects of impulses conveyed by adrenergic postganglionic fibres of the sympathetic nervous system. 2. <pharmacology> An agent that produces effects similar to those of impulses conveyed by adrenergic postganglionic fibres of the sympathetic nervous system. Usually refers to drugs that mimic the effects of stimulating postganglionic adrenergic sympathetic nerves. Includes drugs that directly stimulate adrenergic receptors and drugs that act indirectly by provoking the release of adrenergic transmitters. Synonym: adrenergic. Origin: Gr. Mimetikos = imitative (12 Dec 1998) |
| sympathiconeuritis | Inflammation of the autonomic nerves. (05 Mar 2000) |
| sympathicopathy | A disease resulting from a disorder of the autonomic nervous system. Origin: sympathico-+ G. Pathos, suffering (05 Mar 2000) |
| sympathicotonia | A condition in which there is increased tonus of the sympathetic system and a marked tendency to vascular spasm and high blood pressure; opposed to vagotonia. Origin: sympathico-+ G. Tonos, tone, tension (05 Mar 2000) |
| sympathicotonic | Relating to or characterised by sympathicotonia. (05 Mar 2000) |
| sympathicotripsy | Operation of crushing the sympathetic ganglion. Origin: sympathico-+ G. Tripsis, a rubbing (05 Mar 2000) |
| sympathicotropic | Having a special affinity for the sympathetic nervous system. Origin: sympathico-+ G. Tropikos, inclined, fr. Trope, a turning (05 Mar 2000) |
| sympathicotropic cells | Large epithelioid cells in the hilum of the ovary associated with unmyelinated nerve fibres. (05 Mar 2000) |
| sympathin | <protein> A neurohormone, such asepinephrine, produced in response to stimulationof the sympathetic nervous system and which acts as a chemical mediator invarious organs. (09 Oct 1997) |
| sympathiser | 1. An eye affected with sympathetic ophthalmia. 2. One who exhibits sympathy. (05 Mar 2000) |