Of the 82 cell-attached recordings, 12 neurons had a narrower spike width than the others and could be classified as putative interneurons according to Luczak, et al.17, but these neurons did not stand out from the other neurons in terms of the response patterns described below and are hence not indicated separately.
The Dirac delta is used to model a tall narrow spike function (an impulse), and other similar abstractions such as a point charge, point mass or electron point.
A memorable opening slide depicted a timeline of human history, in the middle of which was a narrow, tall spike showing our relatively brief fossil-fuel-burning period.
Computed interface velocities for quenching in heat treatment, which can be as high as several centimeters per second, show that, in certain cases, the controlling mechanism of massive transformation is steady-state plane front growth with a narrow concentration spike and not complete solute trapping.
FS interneurons showed high action potential firing frequency and had a low input resistance (183.0 MΩ ± 13) and narrow spike width (0.49 ms ± 0.02, n = 32; Supplementary Table 1 and Fig. 5).
Two neurons recorded in the PrL had narrow spike widths (half peak<120 µs, peak-valley<200 µs) and were presumed to be interneurons; they were excluded from further analyses.
In mammals, KCNC-expressing neurons can be readily distinguished from other cells by their high-frequency firing, unique narrow spike waveform [ 64, 65], and in some cases, expression of the calcium-binding protein parvalbumin.
To attempt to separate putative pyramidal neurons (wider spike) from putative interneurons (more narrow spike) (González-Burgos et al. 2005; Mitchell et al. 2007), action potential width was quantified as the time interval between the two extremes of the extracellular voltage (Supplementary Fig. S1A).
Finally, we fit a given deconvolved trace by a sum of scaled narrow spikes in order to obtain the timing of each event.
