Event-Related Changes in the 40 Hz Electroencephalogram in Auditory and Visual Reaction Time Tasks

Jokeit, H.; Goertzl, R.; Kuchleri, E.; Makeig, S.

doi:10.21236/ada379543

Cited by 2 publications

(1 citation statement)

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“…At the level of scalp-recorded EEG and/or MEG, evoked and induced gamma band emissions and synchrony concomitant to behavioural tasks have also been reported (Galambos et al, 1981;Pantev et al, 1991;Ribary et al, 1991;Llinas & Ribary, 1993;Jokeit et al, 1994;Pantev, 1995;Tallon et al, 1995;Tallon-Baudry et al, 1996 for review see Tallon-Baudry & Bertrand, 1999). For instance, Tallon-Baudry et al (1996 carried out a trial-by-trial analysis of EEG responses in the gamma range following the presentation of coherent visual stimuli during a visual discrimination task.…”

Section: Introductionmentioning

confidence: 91%

A quantitative study of gamma‐band activity in human intracranial recordings triggered by visual stimuli

Lachaux

Rodríguez

Martinerie

et al. 2000

Eur J of Neuroscience

122

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This paper studies gamma-band responses from two implanted epileptic patients during a simple visual discrimination task. Our main aim was to ascertain, in a reliable manner, whether evoked (stimulus-locked) and induced (triggered by, but not locked to, stimuli) responses are present in intracranial recordings. For this purpose, we introduce new methods adapted to detect the presence of gamma responses at this level of recording, intermediary between EEG-scalp and unicellular responses. The analysis relies on a trial-by-trial time-frequency analysis and on the use of surrogate data for statistical testing. We report that visual stimulation reliably elicits evoked and induced responses in human intracranial recordings. Induced intracranial gamma activity is significantly present in short oscillatory bursts (a few cycles) following visual stimulation. These responses are highly variable from trial to trial, beginning after 200 ms and lasting up to 500 ms. In contrast, intracranial-evoked gamma responses concentrate around 100 ms latencies corresponding to evoked responses observed on the scalp. We discuss our results in relation to scalp gamma response in a similar protocol [Tallon-Baudry et al. (1996) J. Neurosci., 16, 4240-4249] and draw some conclusions for bridging the gap between gamma oscillations observed on the scalp surface and their possible cortical sources.

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Section: Introductionmentioning

confidence: 91%

A quantitative study of gamma‐band activity in human intracranial recordings triggered by visual stimuli

Lachaux

Rodríguez

Martinerie

et al. 2000

Eur J of Neuroscience

122

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Electroencephalographic evaluation of acoustic therapies for the treatment of chronic and refractory tinnitus

Alonso-Valerdi

Ibarra-Zárate

Tavira-Sánchez

et al. 2017

BMC Ear Nose Throat Disord

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BackgroundTo date, a large number of acoustic therapies have been applied to treat tinnitus. The effect that produces those auditory stimuli is, however, not well understood yet. Furthermore, the conventional clinical protocol is based on a trial-error procedure, and there is not a formal and adequate treatment follow-up. At present, the only way to evaluate acoustic therapies is by means of subjective methods such as analog visual scale and ad-hoc questionnaires.MethodsThis protocol seeks to establish an objective methodology to treat tinnitus with acoustic therapies based on electroencephalographic (EEG) activity evaluation. On the hypothesis that acoustic therapies should produce perceptual and cognitive changes at a cortical level, it is proposed to examine neural electrical activity of patients suffering from refractory and chronic tinnitus in four different stages: at the beginning of the experiment, at one week of treatment, at five weeks of treatment, and at eight weeks of treatment. Four of the most efficient acoustic therapies found at the moment are considered: retraining, auditory discrimination, enriched acoustic environment, and binaural.DiscussionEEG has become a standard brain imaging tool to quantify and qualify neural oscillations, which are basically spatial, temporal, and spectral patterns associated with particular perceptual, cognitive, motor and emotional processes. Neural oscillations have been traditionally studied on the basis of event-related experiments, where time-locked and phase-locked responses (i.e., event-related potentials) along with time-locked but not necessary phase-locked responses (i.e., event-related (de) synchronization) have been essentially estimated. Both potentials and levels of synchronization related to auditory stimuli are herein proposed to assess the effect of acoustic therapies.Trial registrationRegistration Number: ISRCTN14553550. ISRCTN Registry: BioMed Central. Date of Registration: October 31st, 2017.

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Event-Related Changes in the 40 Hz Electroencephalogram in Auditory and Visual Reaction Time Tasks

Cited by 2 publications

References 11 publications

A quantitative study of gamma‐band activity in human intracranial recordings triggered by visual stimuli

A quantitative study of gamma‐band activity in human intracranial recordings triggered by visual stimuli

Electroencephalographic evaluation of acoustic therapies for the treatment of chronic and refractory tinnitus

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