Fig. 3: Dense representation of naive object touch in fast-spiking units across layers. | Communications Biology

Fig. 3: Dense representation of naive object touch in fast-spiking units across layers.

From: High-frequency burst spiking in layer 5 thick-tufted pyramids of rat primary somatosensory cortex encodes exploratory touch

Fig. 3

a Loose-patch recording of an individual fast-spiking-unit (FSU) in L4 including whisker position and naive object touch. Note robust increase in spiking upon naive object touch. b A single touch from a (with asterisk) at increased temporal resolution. The absolute touch duration is indicated with gray shading. Arrows indicate touch start and touch end, respectively. Scale bars inset: 0.5 mV, 0.5 ms. c Average waveform parameters for RSUs and FSUs across layers of PW and SuW column. FSUs in green, RSUs in black. One AP waveform (blue bullet) clustered with FSUs but morphological reconstruction revealed L5st identity and the unit was classified according to morphology. d Individual PSTHs for n = 5 example FSUs recorded across layers. e Spiking rate for PW-FSUs across behavioral states (Q = quiescent, T = touch). f Sparse versus dense coding of touch for regular versus fast-spiking units, respectively (Mann–Whitney, p < 0.01). Boxplots show median as central mark, the edges of the box the 25th and 75th percentiles, the whiskers extend to the most extreme data points, and the outliers are plotted individually.

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