Information dynamics of in silico EEG Brain Waves: Insights into oscillations and functions
Fig 12
Time-delayed mutual information and the emergence of fast γ rhythms.
(Top) PSD peak frequency of oscillations in excitatory (A) and inhibitory (B) neuron groups, where color opacity is directly proportional to the power spectrum density. (Bottom) Time-delayed mutual information in (A) excitatory and (B) inhibitory neuron groups. The solid black line indicates the region where high frequency excitatory oscillations γ emerge (see Fig 6A). The dashed black line indicates the region where inhibitory fast γ oscillations with PSD >1 × 109 coexist with excitatory oscillations with PSD >1 × 1011 (see Fig 6B). Panel (B) bottom depicts that there is a clear relationship between lower mutual information and inhibitory fast γ oscillations. Lower mutual information indicates that the system is less predictable, which means knowing pass states gives less information about the future of the system and vice versa. Dotted and dashed-dotted black lines indicate the line of maximum variance of the inhibitory and excitatory neuron states X, respectively.