Task-relevant late positive component in rats: Is it related to hippocampal theta rhythm?

Brankačk, Jurij; Seidenbecher, Thomas; Müller‐Gärtner, Hans‐Wilhelm

doi:10.1002/(sici)1098-1063(1996)6:5<475::aid-hipo1>3.0.co;2-i

Cited by 40 publications

(24 citation statements)

References 78 publications

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“…The latency of the P3, however, differs between studies. Some found a latency similar to that in the present study (Brankacˇk et al, 1996;Ehlers et al, 1994;Hurlbut et al, 1987; ERPs in humans and rats 65 …”

Section: Discussionsupporting

confidence: 88%

Auditory event–related potentials in humans and rats: Effects of task manipulation

Sambeth¹,

Maes²,

Luijtelaar³

et al. 2003

Psychophysiology

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The purpose of this study was to compare components of the rat and human auditory event-related potential (ERP) as generated in active oddball and passive single-stimulus tasks. The rats were trained to discriminate between target and standard stimuli in an oddball task, whereas the human subjects received instructions. Task effects on various ERP components were found in both species. Interestingly, effects on the P3 component were similar in the species with regard to amplitude: Target stimuli elicited a higher amplitude in the oddball task than did standard stimuli. This might indicate that the P3 shares the same characteristics between species. However, the first four components occurred 1.82 times earlier in rats than in humans, expecting a P3 of about 200 ms in rats. The P3 in rats appeared at 380 ms. We conclude that either the relation between human and rat peak latencies is not linear, or the P3 in rats is not the equivalent of the human P3.

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Section: Discussionsupporting

confidence: 88%

Auditory event–related potentials in humans and rats: Effects of task manipulation

Sambeth¹,

Maes²,

Luijtelaar³

et al. 2003

Psychophysiology

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“…It has been shown that event-related modulation of y rhythms is an important neural correlate of brain processes for the integration of sensorimotor and cognitive information [Basar et al, 1999;Brankack et al, 1996;Klimesch, 1999;Pfurtscheller and Lopes da Silva, 1999]. In brief, y rhythms functionally connect the activity of hippocampal systems and cortical mantle in many species [Buzsaki and Draguhn, 2004], and are supposed to be related to focused attention, working memory, encoding processes of episodic memory, and control of action [Gevins and Smith, 2000;Klimesch, 1999;Klimesch et al, 2001Klimesch et al, , 2006Sauseng et al, 2002Sauseng et al, , 2004Sochů rková et al, 2006].…”

Section: Discussionmentioning

confidence: 99%

Directional functional coupling of cerebral rhythms between anterior cingulate and dorsolateral prefrontal areas during rare stimuli: A directed transfer function analysis of human depth EEG signal

Brázdil

Babiloni

Román

et al. 2007

Human Brain Mapping

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Abstract:What is the neural substrate of our capability to properly react to changes in the environment? It can be hypothesized that the anterior cingulate cortex (ACC) manages repetitive stimuli in routine conditions and alerts the dorsolateral prefrontal cortex (PFC) when stimulation unexpectedly changes. To provide evidence in favor of this hypothesis, intracerebral stereoelectroencephalographic (SEEG) data were recorded from the anterior cingulate and dorsolateral PFC of eight epileptic patients in a standard visual oddball task during presurgical monitoring. Two types of stimuli (200 ms duration) such as the letters O (frequent stimuli; 80% of probability) and X (rare stimuli) were presented in random order, with an interstimulus interval between 2 and 5 s. Subjects had to mentally count the rare (target) stimuli and to press a button with their dominant hand as quickly and accurately as possible. EEG frequency bands of interest were y (4-8 Hz), a (8-12 Hz), b (14-30 Hz), and g (30-45 Hz). The directionality of the information flux within the EEG rhythms was indexed by a directed transfer function (DTF). The results showed that compared with the frequent stimuli, the target stimuli induced a statistically significant increase of DTF values from the anterior cingulate to the dorsolateral PFC at the y rhythms (P < 0.01). These results provide support to the hypothesis that ACC directly or indirectly affects the oscillatory activity of dorsolateral PFC by a selective frequency code under typical oddball conditions. Hum Brain

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“…We have considered the possibility that the phase of ongoing theta oscillations is "reset" each time a memory set is scanned. There is evidence for the reset of the theta oscillations in some brain regions (Berger et al, 1983;Rahn and Basar 1993a,b;Brankack et al, 1996;Brandt 1997). We Figure 6.…”

Section: Model Ii: Reset Of the Slow-wave Oscillationmentioning

confidence: 99%

An Oscillatory Short-Term Memory Buffer Model Can Account for Data on the Sternberg Task

1998

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A limited number (7 Ϯ 2) of items can be held in human short-term memory (STM). We have previously suggested that observed dual (theta and gamma) oscillations could underlie a multiplexing mechanism that enables a single network to actively store up to seven memories. Here we have asked whether models of this kind can account for the data on the Sternberg task, the most quantitative measurements of memory search available. We have found several variants of the oscillatory search model that account for the quantitative dependence of the reaction time distribution on the number of items (S) held in STM. The models differ on the issues of (1) whether theta frequency varies with S and (2) whether the phase of ongoing oscillations is reset by the probe. Using these models the frequencies of dual oscillations can be derived from psychophysical data. The derived values (f ϭ 6-10 Hz; f ␥ ϭ 45-60 Hz) are in reasonable agreement with experimental values. The exhaustive nature of the serial search that has been inferred from psychophysical measurements can be plausibly explained by these oscillatory models. One argument against exhaustive serial search has been the existence of serial position effects. We find that these effects can be explained by short-term repetition priming in the context of serial scanning models. Our results strengthen the case for serial processing and point to experiments that discriminate between variants of the serial scanning process.

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Task-relevant late positive component in rats: Is it related to hippocampal theta rhythm?

Cited by 40 publications

References 78 publications

Auditory event–related potentials in humans and rats: Effects of task manipulation

Auditory event–related potentials in humans and rats: Effects of task manipulation

Directional functional coupling of cerebral rhythms between anterior cingulate and dorsolateral prefrontal areas during rare stimuli: A directed transfer function analysis of human depth EEG signal

An Oscillatory Short-Term Memory Buffer Model Can Account for Data on the Sternberg Task

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