Systematic rules underlying spectral pattern variability: experimental results and a review of the evidence.
On the basis of three different experiments: oddball task (visual, auditory, and audio-visual stimuli), modified Sternberg's, and multistage memory tasks, it was shown that: a) there was not a single typical spectral pattern type that would characterize the majority of the trials; b) the total number of the different spectral pattern types was limited; c) different spectral pattern types had different importance to the brain--their occurrence was more or less probable; d) the total number and the number of the most probable spectral pattern types were dependent on the functional brain state; e) actual spectral pattern of variability during rest with closed eyes was relatively high (around 65% from the maximum possible rate), but significantly less than stochastic spectral pattern variability. It is suggested that identical sensory events can potentially trigger a limited number of several different alternative reaction patterns in EEG/MEG, depending on the situational context.
Fingelkurts
Alexander A
AA
Human Brain Research Group, Human Physiology Department, Moscow State University, Moscow, Russian Federation. alexander.fingelkurts@bm-science.com
Fingelkurts
Andrew A
AA
Krause
Christina M
CM
Kaplan
Alexander Ya
AY
D000328:Adult; D001288:Attention / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D003071:Cognition / Q000502:physiology*; D004569:Electroencephalography / Q000379:methods; D005260:Female; D007839:Functional Laterality; D006801:Humans; D015225:Magnetoencephalography / Q000379:methods; D008297:Male; D008568:Memory / Q000502:physiology*; D008959:Models, Neurological; D010465:Perception / Q000502:physiology*; D010812:Physical Stimulation; D011930:Reaction Time; D012146:Rest / Q000502:physiology