antidromic

antidromic
Denoting the propagation of an impulse along a conduction system ( e.g., nerve fiber) in the direction opposite to which it normally travels.

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an·ti·dro·mic .ant-i-'dräm-ik, -'drōm- adj
1) proceeding or conducting in a direction opposite to the usual one used esp. of a nerve impulse or fiber <\antidromic action potentials>
2) characterized by antidromic conduction <\antidromic tachycardia in which impulses travel from the ventricle to the atrium via the atrioventricular node>
an·ti·dro·mi·cal·ly -i-k(ə-)lē adv

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adj.
describing impulses travelling 'the wrong way' in a nerve fibre. This is rare but may happen in shingles, when the irritation caused by the virus in the spinal canal initiates impulses that travel outwards in normally afferent nerves. The area of skin that the sensory nerves supply (usually a strip on the trunk) becomes painfully blistered. Antidromic impulses cannot pass synapse, which work in one direction only.

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an·ti·drom·ic (an″te-dromґik) [Gr. antidromein to run in a contrary direction] conducting impulses in a direction opposite to the normal; see under conduction. Cf. orthodromic.

Medical dictionary. 2011.

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Look at other dictionaries:

  • antidromic — [an΄ti dräm′ik] adj. [< ANTI + Gr dromos, a running (see DROMEDARY) + IC] Physiol. conveying nerve impulses in a direction opposite to the normal …   English World dictionary

  • Antidromic — For most neurons, their dendrites, soma, or axons are depolarized forming an action potential that moves from the starting point of the depolarization toward the axons of the neuron. An antidromic impulse in an axon refers to conduction opposite… …   Wikipedia

  • antidromic — 1. Running in the opposite direction: most common usage is in neurophysiology for the passage of an action potential in the opposite direction to that in which it would normally travel ie. from presynaptic region towards cell body. 1. Running in… …   Dictionary of molecular biology

  • antidromic — adj. describing impulses travelling ‘the wrong way’ in a nerve fibre. This is rare but may happen in shingles, when the irritation caused by the virus in the spinal canal initiates impulses that travel outwards in normally afferent nerves. The… …   The new mediacal dictionary

  • antidromic atrioventricular reciprocating tachycardia — antidromic circus movement tachycardia a reentrant tachycardia in which the reentrant circuit involves anterograde conduction over the accessory pathway and retrograde conduction over the normal pathway through the AV node and the His bundle. Cf …   Medical dictionary

  • antidromic — adjective Etymology: anti + Greek dromos racecourse, running more at dromedary Date: circa 1927 proceeding or conducting in a direction opposite to the usual one used especially of a nerve impulse or fiber • antidromically adverb …   New Collegiate Dictionary

  • antidromic — adj. [Gr. anti, against; dromos, running] Moving in a direction contrary to normal; see orthodromic …   Dictionary of invertebrate zoology

  • antidromic — antidromically, adv. /an ti drom ik/, adj. Physiol. conducting nerve impulses in a direction opposite to the usual one. [1905 10; ANTI + DROME + IC] * * * …   Universalium

  • antidromic — adjective flowing in the opposite direction from normal …   Wiktionary

  • antidromic — adj. carrying nerve impulses in a direction opposite the normal one (Physiology) …   English contemporary dictionary

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