concept

spike

Also known as: spike, spikes

Facts (10)

Sources

Branching morphology determines signal propagation dynamics in ... nature.com Nature Aug 21, 2017 7 facts

claimIn neurons, for stimulation frequencies higher than 440 Hz and axonal lengths greater than 0.42 cm, only a finite number of spikes propagate successfully before the signal becomes flat.

claimIn the 'Several' activity pattern, more than one spike succeeds in propagating into the daughter branches of an axon, similar to the 'Single' pattern.

claimStockbridge demonstrated that at branching points with short and long daughter branches, only the first spike of an adjacent pair invades the long branch, while both spikes propagate into the short branch.

measurementFor unbranched linear axons at stimulus frequencies greater than 300 Hz and lengths greater than 0.5 cm, the propagation pattern consists of a single spike followed by several failures.

claimComplex signal propagation patterns in neurons include single spikes followed by failures (such as '1:2', '1:3', and '1:4' patterns) or alternations between intermittent train patterns (such as '3:1' and '4:1').

claimIn the 'Single' activity pattern, only the first spike of the train is transmitted into the daughter branches of an axon.

claimFor stimulus frequencies higher than 146 Hz in branched axons, some spikes fail to propagate in the mother branch before reaching the branching point.

Action potentials and synapses - Queensland Brain Institute qbi.uq.edu.au Queensland Brain Institute 2 facts

claimAn action potential, also called a spike, triggers the release of neurotransmitters across the synaptic cleft, which subsequently induces an electrical signal in the postsynaptic neuron.

claimNeuroscientists refer to action potentials as 'spikes' because of the shape they exhibit when recorded using sensitive electrical equipment.

Protocol for testing global neuronal workspace and integrated ... journals.plos.org PLOS ONE 1 fact

referenceThe paper 'Improved measures of phase-coupling between spikes and the Local Field Potential' was published by Vinck M, Battaglia FP, Womelsdorf T, and Pennartz C in the Journal of Computational Neuroscience in 2012 (Volume 33, Issue 1, pages 53–75, PMID 22187161).