title: [Background gamma activity in the rabbit electroencephalogram as an index of the level of sustained (tonic) attention in the active oddball paradigm in rabbits].
abstract: Tonic brain activity substantially affects the character of subjects' responsiveness to sensory stimuli. The dynamics of background gamma-band activity in rabbit electroencephalogram was investigated in the active oddball paradigm modified for animal studies. It was shown that increase in the power and coherence of gamma activity reflects the target stimulus expectancy. Correct responses to stimuli occur at a particular level of background gamma activity, which is likely to correspond to the optimal level of sustained (tonic) attention. Decrease in the level of background gamma activity leads to omissions of responses to target stimuli, while it's excessive level results in erroneous responses to nontarget stimuli (false alarms). The observed dynamics of tonic gamma activity can be interpreted as the result of variations in the level of tonic cholinergic activation of the brain cortex.
authors.forename: Ia A
authors.initials: IaA
authors.lastname: Panasiuk
authors.forename: O B
authors.initials: OB
authors.lastname: Matselepa
authors.forename: B V
authors.initials: BV
authors.lastname: Chernyshev
authors.forename: I I
authors.initials: II
authors.lastname: Semikopnaia
authors.forename: A A
authors.initials: AA
authors.lastname: Moskvitin
authors.forename: N O
authors.initials: NO
authors.lastname: Timofeeva
mesh_terms: D000818:Animals; D001288:Attention; D003216:Conditioning, Operant; D004569:Electroencephalography; D011817:Rabbits