Theta EEG oscillatory activity and auditory change detection

Fuentemilla, Lluís; Marco-Pallarés, Josep; Münte, Thomas F.; Grau, Cai

doi:10.1016/j.brainres.2007.07.079

Cited by 125 publications

(153 citation statements)

References 64 publications

Supporting

Mentioning

126

Contrasting

Order By: Relevance

“…It has been repeatedly suggested [44] that evoked responses may be the result of synchronisation of the phase in on-going EEG activity rather than additive neuronal activity. This may contribute to the observation that phase may provide a more sensitive means of detecting evoked responses [7,8] than the power spectrum. Since the evoked response was subtracted prior to the current coherence analysis, the result suggests that there is also increased synchronisation between channels that goes beyond a simple time-locking to the stimulus.…”

Section: Discussionmentioning

confidence: 99%

“…The auditory induced response of the brain has been studied with specific stimulus types such as perturbed and unperturbed sequences of pure tones [6,7,8,9], repeated identical words [10], targeted words in specifically designed sentences [11], and repeating modified and unmodified sentences (changing the pitch of the last word) [12,13]. For example, the gamma band is activated in response to pure-tones with temporal perturbations [6], it is also affected when subjects are presented with different types of keywords in sentences [11], and an increase in 40 Hz power has been observed in response to standard but not deviant repeating words [10].…”

Section: Introductionmentioning

confidence: 99%

“…Considerable research effort has gone into improving the detection rate of this response [17] for different conditions, such as in children with auditory neuropathy spectrum disorder [18]. However, to the best of our knowledge, little research has focused on the presence of induced responses to pure tones [6,7,8,9] and none on induced responses to repeating pure tones without manipulating the presentation protocol. This may be due to the assumption that a simple tone burst stimulus may not provide any higher order perception cues that would lead to the induced response, or because it is presumed that habituation of the brain to a repetitive sound may cause existing induced responses to vanish rapidly in repetitive stimulus presentations.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Induced activity in EEG in response to auditory stimulation

Hosseini

Bell

Wang

et al. 2015

Biomedical Signal Processing and Control

View full text Add to dashboard Cite

The response of the brain to a sensory stimulus may present itself in the electroencephalogram (EEG) as evoked and/or induced activity. While the evoked response is given by peaks and troughs in the signal, time-locked and phase-locked to the stimuli, the induced response is time-but not phase-locked, and can be considered as an increase or a decrease in the power of EEG in a specific frequency band at a specific time range with regard to the stimulus onset. The induced response does not have the same phase following successive stimuli. It is believed that cognition and perception of a stimulus present themselves primarily as the induced response in the EEG. In this paper, the induced response of the brain to auditory speech stimuli is investigated and different approaches to detect induced activity are compared. It is shown that there is an increase in theta and delta power in response to words compared to the baseline, starting around 500 ms after their onset. During this time, there is also an increase in pairwise coherence between the posterior electrodes. In response to tone bursts, a change in pairwise coherence was observed in the beta band starting around 200 ms. To the best of our knowledge, this is the first time such responses have been described using simple protocols without complex stimulus manipulations being involved. Responses in the EEG to speech rather than the more conventional tone-bursts or clicks suggests that it may be feasible to use the EEG as an objective means to demonstrate brain activation to salient real world stimuli. This would be of particular benefit in investigating access to speech in patients who are unable or unwilling to reliably respond to conventional subjective experimental protocols, such as infants.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Induced activity in EEG in response to auditory stimulation

Hosseini

Bell

Wang

et al. 2015

Biomedical Signal Processing and Control

View full text Add to dashboard Cite

show abstract

“…Taskrelated coherence changes were higher in the right-hemispheric medial frontal and temporal regions in the RR group, which points to a higher synchronization. Indeed, when processing pure tones, increased EEG theta coherence was found in the frontal and temporal areas [34].…”

Section: Discussionmentioning

confidence: 99%

“…Theta band for example, which is induced via the limbic-hippocampal-cortical feedback loops, is one of the auditory-specific rhythms [33,34]. Animal studies have shown that theta band is generated by the interplay of glutamatergic, GABAergic [35,36], and cholinergic [37] neurons.…”

Section: Introductionmentioning

confidence: 99%

Theta power and coherence illustrate cerebral processing of octave illusion

Zheng

Chai

et al. 2014

Translational Neuroscience

View full text Add to dashboard Cite

Background: Understanding how cerebral regions are synchronized when hearing illusions might help to explain some of the mechanisms of hallucination in psychiatric disorders. EEG theta coherence in response to the octave illusion in healthy volunteers might be used for this purpose. Methods: Right-handed healthy volunteers were invited to hear silence, normal and reversed sequences of the octave illusion. Results: After hearing both normal and reversed sequences of the octave illusion, 11 people reported hearing the high tone in the left ear (RL) and 18 in the right (RR). The task-related power change in the right frontal and temporal areas and the task-related coherence difference in the right medial frontal and temporal areas were significantly increased in the RR group compared to the RL group. Conclusion: When processing the octave illusion, the right ear predominance was linked to a higher reactivity in the right frontal and right temporal areas in healthy right-handers.

show abstract