Event-related dynamics of the gamma-band oscillation in the human brain: information processing during a GO/NOGO hand movement task

Shibata, Tadahiko; Shimoyama, Ichiro; Iwamoto, Toshihiko; Abla, Dilshat; Iwasa, Hiroto; Koseki, Keijiro; Yamanouchi, Naoto; Sato, Toshio; Nakajima, Yoshio

doi:10.1016/s0168-0102(99)00003-6

Cited by 42 publications

(24 citation statements)

References 22 publications

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“…4), indicating that the enhanced posterior N2 in the hard task is directly related to the difficulty of visual discrimination tasks. Inhibition of behavior has also been related to the relation to EEG gamma activity (Shibata et al, 1999b). In that study, an enhanced gamma band oscillation was found in central regions (C3, C4 and Cz) in a time range at around 230 ms. Interestingly, this is the same time range where an enhanced gamma activity for the hard task was found (Fig.…”

Section: Discussionmentioning

confidence: 85%

Effects of task difficulty on evoked gamma activity and ERPs in a visual discrimination task

Senkowski

Herrmann

2002

Clinical Neurophysiology

137

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Objective: The present study examined oscillatory brain activity of the EEG gamma band and event-related potentials (ERPs) with relation to the difficulty of a visual discrimination task.Methods: Three tasks with identical stimulus material were performed by 9 healthy subjects. The tasks comprised a passive control task, and an easy and a hard visual discrimination task, requiring discrimination of the color of circles. EEG was recorded from 26 electrodes. A wavelet transform based on Morlet wavelets was employed for the analysis of gamma activity.Results: Evoked EEG gamma activity was enhanced by both discrimination tasks as compared to the passive control task. Within the two discrimination tasks, the latency of the evoked gamma peak was delayed for the harder task. Higher amplitudes of the ERP components N170 and P300 were found in both discrimination tasks as compared to the passive task. The N2b, which showed a maximum activation at about 260 ms, was increased in the hard discrimination task as compared to the easy discrimination task.Conclusions: Our results indicate that early evoked gamma activity and N2b are related to the difficulty of visual discrimination processes. A delayed gamma activity in the hard task indicated a longer duration of stimulus processing, whereas the amplitude of the N2b directly indicates the level of task difficulty. q

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Section: Discussionmentioning

confidence: 85%

Effects of task difficulty on evoked gamma activity and ERPs in a visual discrimination task

Senkowski

Herrmann

2002

Clinical Neurophysiology

137

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“…We selected theta and gamma band activity based on previous EEG research, which suggests strong task-related activity in the theta range (Kirk and Mackay, 2003;Klimesch, 1999;Luu et al, 2004) and lower gamma range (Keil et al, 2001), and based on visual inspection of time-frequency plots, which show predominant energy in these ranges (e.g., Figure 5c). We note that 21-29 Hz is sometimes referred to as fast or upper beta (Steriade, 2006) and sometimes as lower gamma (Keil et al, 2001;Shibata et al, 1999); we use the latter term without intention of distinguishing lower gamma from upper beta.…”

Section: Frequency Analysesmentioning

confidence: 99%

Reward expectation modulates feedback-related negativity and EEG spectra

2007

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The ability to evaluate outcomes of previous decisions is critical to adaptive decision-making. The feedback-related negativity (FRN) is an event-related potential (ERP) modulation that distinguishes losses from wins, but little is known about the effects of outcome probability on these ERP responses. Further, little is known about the frequency characteristics of feedback processing, for example, event-related oscillations and phase synchronizations. Here, we report an EEG experiment designed to address these issues. Subjects engaged in a probabilistic reinforcement learning task in which we manipulated, across blocks, the probability of winning and losing to each of two possible decision options. Behaviorally, all subjects quickly adapted their decision-making to maximize rewards. ERP analyses revealed that the probability of reward modulated neural responses to wins, but not to losses. This was seen both across blocks as well as within blocks, as learning progressed. Frequency decomposition via complex wavelets revealed that EEG responses to losses, compared to wins, were associated with enhanced power and phase coherence in the theta frequency band. As in the ERP analyses, power and phase coherence values following wins but not losses were modulated by reward probability. Some findings between ERP and frequency analyses diverged, suggesting that these analytic approaches provide complementary insights into neural processing. These findings suggest that the neural mechanisms of feedback processing may differ between wins and losses.

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“…In animal studies, this synchrony of activities occurs within theγ-band frequency range [1,2,3]. Induced γ-band activity (GBA) is implicated in integrated cognitive processing in the mammalian brain, and GBA in the neocortex can be generated by responses to sensory stimuli of various modalities and tasks [4,5,6,7,8,9,10,11,12,13,14,15,16]. …”

Section: Introductionmentioning

confidence: 99%

Event-Related Synchronization and Desynchronization of High-Frequency Electroencephalographic Activity during a Visual Go/No-Go Paradigm

Iijima¹,

Mase

Osawa³

et al. 2015

Neuropsychobiology

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Objective: High-frequency electroencephalography (EEG) activity has been observed in association with cognitive processing, including stimulus perception, consciousness and selective attention, in humans. The aim of this study was to compare visual-motor integrated processing between execution and inhibition of a motor response using event-related synchronization (ERS) and desynchronization (ERD) in the 15- to 80-Hz range and to investigate a relationship between event-related potentials (ERPs) and ERS/ERD in 10 normal young subjects. Methods: EEGs were recorded from 21 scalp sites during a visual go/no-go paradigm. For ERPs, 40 artifact-free trials were averaged off-line referenced to linked ear lobes. In the β and γ bands, ERS and ERD were calculated by time-frequency analysis. Results: Go N2 and no-go N2 were elicited 200-250 ms after stimuli, and their distributions were predominant at Fz. Go P3 was predominantly elicited 340-360 ms after stimuli at Pz, whereas no-go P3 was predominantly elicited 360-380 ms after stimuli at Cz. ERD of the β band at Fz and Cz during 300-600 ms showed in the go condition, whereas ERD showed between 39 and 42 Hz at F3 in the no-go condition. Conclusion: Oscillatory cortical response-related β and γ activities differ between the processing of execution and inhibition in motor responses. β ERDs in the sensorimotor areas with go stimuli may be related to motor responses, and γ ERDs in the left frontal area with no-go stimuli may be involved in the processing of inhibition of motor responses.

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Event-related dynamics of the gamma-band oscillation in the human brain: information processing during a GO/NOGO hand movement task

Cited by 42 publications

References 22 publications

Effects of task difficulty on evoked gamma activity and ERPs in a visual discrimination task

Effects of task difficulty on evoked gamma activity and ERPs in a visual discrimination task

Reward expectation modulates feedback-related negativity and EEG spectra

Event-Related Synchronization and Desynchronization of High-Frequency Electroencephalographic Activity during a Visual Go/No-Go Paradigm

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