A biophysical model of striatal microcircuits suggests gamma and beta oscillations interleaved at delta/theta frequencies mediate periodicity in motor control
Fig 2
Applied noise determines interburst and intraburst frequency of FSI spiking.
(A) i. Single model FSI with tonic excitation (7 μA/cm2) and weak Poisson noise (λ = 500) spikes at γ nested in δ/θ, while a single model FSI with tonic excitation (7 μA/cm2) and strong Poisson noise (λ = 7000) has limited low-frequency content. ii. Power spectral density of voltage traces in (A)i, comparing low and high levels of noise. The solid line represents the mean value over 20 simulations per point. Shading represents standard deviation from these means. Power spectra are derived using Thomson’s multitaper power spectral density (PSD) estimate (MATLAB function pmtm). (B) Plot of the inter-burst frequency and power of a single model FSI as Poisson noise of varying rates is applied. (C) Plot of the inter-burst frequency and power of a single model FSI as Poisson noise of varying amplitudes is applied. For B and C Iapp = 7 μA/cm2.