Dictionary > Decremental conduction

Decremental conduction

Definition
noun
The impaired conduction in a portion of a fiber due to progressively lessening response of the unexcited portion of the fiber to the action potential coming toward it
Supplement
In biology, conduction refers to the conveyance of nerve impulses, sound waves, electrons, or heat. Decremental conduction is a term used to refer to an impaired conduction that occurs in nerve fibers. The impaired conduction is characterized by a gradual decrease in the stimuli and response along the pathway of conduction.1 This also means that the amplitude of the electric impulse decreases with distance as the impulse is transmitted in nerve fiber. Decremental conduction occurs by decreasing the speed of conduction, amplitude of action potential, and the extent of spread of the impulse. The effectiveness of excitation is lost during the AP propagation through the AV N zone. Decremental conduction is regarded as the most common cause of a unidirectional block in ventricular tissue.2
See also:

Reference(s):

1 Decremental conduction. (n.d.) Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. (2003). Retrieved June 30 2015 from Link

2 Brenner, G. & Stevens, C. (2013). Pharmacology. Philadelphia, PA: Elsevier/Saunders.


You will also like...

Crossing Over and Genetic Diversity
Inheritance and Probability

Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..

Protein (illustration)
Protein Variety

The sequence of amino acids determines the type of protein. Protein is synthesized according to the sequence of nucleoti..

Schematic diagram of bacterial lactose operon
Gene Action – Operon Hypothesis

Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

..

Disturbance on a still water
Abiotic Factors – Water Conditions

A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..

IQ, Creativity and Learning
IQ, Creativity and Learning

Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

Freshwater lake ecosystem
Freshwater Producers and Consumers

Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and deco..

Related Articles...

No related articles found

See all Related Topics