Inferring oscillatory modulation in neural spike trains
Fig 10
Two simultaneously-recorded motor cortical neurons: Slow fluctuations in firing rate for neuron 1 and 2.
A) rasters from sample trials for the two neurons. There are noticeable holes in the rasters of the neuron 1, and neuron 2 also appears to have a similar slower fluctuation that is less noticeable. B, C) the PSTHs for the two neurons (top) show they both increase their activity around the time of PULL onset (0ms), and power spectral density of latent state show slow fluctuations on the order of 1-2 Hz. Correlation coefficient at 0 lag for the slow fluctuations inferred from neuron 1 and 2 are weakly correlated, with a correlation coefficient 0.15, p < 1 × 10−3, boot strap test.