Cortical High-Gamma Responses in Auditory Processing

Cervenka, Mackenzie C.; Nagle, Stephanie; Boatman-Reich, Dana

doi:10.1044/1059-0889(2011/10-0036)

Cited by 20 publications

(15 citation statements)

References 62 publications

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“…The present finding supports previous ECoG studies that highlight the importance of highgamma activity in auditory processing (Herff et al, 2015;Pasley et al, 2012;Pei et al, 2011;Potes et al, 2012;Sturm et al, 2014) (see Cervenka et al, 2011). Specifically, our results replicate the findings that high-gamma tracks music envelopes (Sturm et al, 2014).…”

Section: Discussionsupporting

confidence: 92%

Prefrontal High Gamma in ECoG tags periodicity of musical rhythms in perception and imagination

Herff

Milne

Johnson

et al. 2019

Preprint

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Rhythmic auditory stimuli are known to elicit matching activity patterns in neural populations. Furthermore, recent research has established the particular importance of highgamma brain activity in auditory processing. Here, we use electrocorticography (ECog) recordings of nine participants, to see whether high-gamma activity tracks the envelope of musical rhythms during rhythm perception and imagination. Rhythm imagination was elicited by asking the participants to imagine the rhythm to continue during pauses of several repetitions.We deploy an approach that utilizes periodicity of the signals, by computing the correlation between the autocorrelations (ACC) of both the musical rhythms and the neural signals. A condition in which participants listened to white-noise was used to establish a baseline of highgamma activity during auditory presentation. High-gamma autocorrelations in auditory areas in the superior temporal gyrus and in frontal areas on both hemispheres significantly matched the autocorrelation of the musical rhythms. Overall, more significant electrodes are observed on the right hemisphere. Of particular interest is a large cluster of electrodes in the right prefrontal cortex that is active during both rhythm perception and imagination. This indicates conscious processing of the rhythms' structure as opposed to mere auditory phenomena. The ACC approach clearly highlights that high-gamma activity measured from cortical electrodes tracks both attended and imagined rhythms.

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Section: Discussionsupporting

confidence: 92%

Prefrontal High Gamma in ECoG tags periodicity of musical rhythms in perception and imagination

Herff

Milne

Johnson

et al. 2019

Preprint

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“…We computed the time-frequency energy distribution of ictal activity in all recorded channels using a matching pursuit (MP) algorithm (Mallat and Zhang, 1993), which has been previously successfully used for detection of epileptic activity (Jouny et al, 2007a; Jouny et al, 2003), as well as functional activity (Boatman-Reich et al, 2010; Cervenka et al, 2011a; Cervenka et al, 2013a; Cervenka et al, 2013b; Cervenka et al, 2011b). MP is an iterative procedure that decomposes signal x(t) into a linear combination of members of a specified set of functions.…”

Section: Methodsmentioning

confidence: 99%

Ictal propagation of high frequency activity is recapitulated in interictal recordings: Effective connectivity of epileptogenic networks recorded with intracranial EEG

et al. 2014

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Seizures are increasingly understood to arise from epileptogenic networks across which ictal activity is propagated and sustained. In patients undergoing invasive monitoring for epilepsy surgery, high frequency oscillations have been observed within the seizure onset zone during both ictal and interictal intervals. We hypothesized that the patterns by which high frequency activity is propagated would help elucidate epileptogenic networks and thereby identify network nodes relevant for surgical planning. Intracranial EEG recordings were analyzed with a multivariate autoregressive modeling technique (short-time direct directed transfer function - SdDTF), based on the concept of Granger causality, to estimate the directionality and intensity of propagation of high frequency activity (70–175 Hz) during ictal and interictal recordings. These analyses revealed prominent divergence and convergence of high frequency activity propagation at sites identified by epileptologists as part of the ictal onset zone. In contrast, relatively little propagation of this activity was observed among the other analyzed sites. This pattern was observed in both subdural and depth electrode recordings of patients with focal ictal onset, but not in patients with a widely distributed ictal onset. In patients with focal ictal onsets, the patterns of propagation recorded during pre-ictal (up to 5 minutes immediately preceding ictal onset) and interictal (more than 24 hours before and after seizures) intervals were very similar to those recorded during seizures. The ability to characterize epileptogenic networks from interictal recordings could have important clinical implications for epilepsy surgery planning by reducing the need for prolonged invasive monitoring to record spontaneous seizures.

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“…Given that brain oscillations can provide an understanding about levels of processing of the brain function different from ERPs ( Cohen, 2014a ), previous research has also investigated the functional association between SGT and brain oscillations, showing changes at different frequency bands (alpha, beta, theta) when comparing SGT with external tasks ( Cooper et al, 2003 ; Engel and Fries, 2010 ; Braboszcz and Delorme, 2011 ). On the other hand, gamma band activity has been classically shown to index auditory stimuli processing ( Tiitinen et al, 1993 ; Cervenka et al, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Beta Oscillations Distinguish Between Two Forms of Mental Imagery While Gamma and Theta Activity Reflects Auditory Attention

Villena‐González

Palacios-García

Rodríguez

et al. 2018

Front. Hum. Neurosci.

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Visual sensory processing of external events decreases when attention is internally oriented toward self-generated thoughts and also differences in attenuation have been shown depending on the thought’s modality (visual or auditory thought). The present study aims to assess whether such modulations occurs also in auditory modality. In order to investigate auditory sensory modulations, we compared a passive listening condition with two conditions in which attention was internally oriented as a part of a task; a visual imagery condition and an inner speech condition. EEG signal was recorded from 20 participants while they were exposed to auditory probes during these three conditions. ERP results showed no differences in N1 auditory response comparing the three conditions reflecting maintenance of evoked electrophysiological reactivity for auditory modality. Nonetheless, time-frequency analyses showed that gamma and theta power in frontal regions was higher for passive listening than for internal attentional conditions. Specifically, the reduced amplitude in early gamma and theta band during both inward attention conditions may reflect reduced conscious attention of the current auditory stimulation. Finally, different pattern of beta band activity was observed only during visual imagery which can reflect cross-modal integration between visual and auditory modalities and it can distinguish this form of mental imagery from the inner speech. Taken together, these results showed that attentional suppression mechanisms in auditory modality are different from visual modality during mental imagery processes. Our results about oscillatory activity also confirm the important role of gamma oscillations in auditory processing and the differential neural dynamics underlying the visual and auditory/verbal imagery.

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Cortical High-Gamma Responses in Auditory Processing

Cited by 20 publications

References 62 publications

Prefrontal High Gamma in ECoG tags periodicity of musical rhythms in perception and imagination

Prefrontal High Gamma in ECoG tags periodicity of musical rhythms in perception and imagination

Ictal propagation of high frequency activity is recapitulated in interictal recordings: Effective connectivity of epileptogenic networks recorded with intracranial EEG

Beta Oscillations Distinguish Between Two Forms of Mental Imagery While Gamma and Theta Activity Reflects Auditory Attention

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