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...

Cell Biology
Cell Biology

The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

Angle Oak Tree
Seed Plants

Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..

Balanced Diet
A Balanced Diet – Minerals and Proteins

Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..

Biological Energy
ATP & ADP – Biological Energy

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

Freshwater lake ecosystem
Freshwater Producers and Consumers

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

Golgi apparatus (3-D illustration)
Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

Related Articles...

No related articles found

See all Related Topics