from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A wave of physical and chemical excitation along a nerve fiber in response to a stimulus, accompanied by a transient change in electric potential in the membrane of the fiber.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The signal transmitted along a nerve fibre, either in response to a stimulus (such as touch, pain or heat), or as an instruction (such as causing a muscle to contract).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the electrical discharge that travels along a nerve fiber
Sorry, no etymologies found.
Back in 1965, knowing that the transmission of a nerve impulse from one cell to another involves the movement of sodium and potassium ions back and forth through the cell membrane, and is controlled by the enzyme sodium-potassium ATPase, Yedy Israel and Harold Kalant had set up an experiment that showed that alcohol inhibits the activity of this enzyme and tends to “shut off” the cell.