Topic: subthreshold potassium channel activation

Populations of cortical neurons can respond to changes in their common input within about a millisecond. However, that response speed has a pronounced dependence on the temporal statistics of the neuron's input (Tchumatchenko etal.2011, Merino etal. 2021, Revah etal. 2024). Slowly fluctuating inputs allow for much more rapid responses. In the dynamic gain function of the individual neuron, this corresponds to a wider bandwidth under slower input correlations. Fourcaud etal. (2003) demonstrated that a wide bandwidth requires a strong voltage dependence of the action potential initiating current