Human memory formation is accompanied by rhinal–hippocampal coupling and decoupling

Fell, Juergen; Klaver, Peter; Lehnertz, Klaus; Grünwald, Thomas; Schaller, Carlo; Elger, Christian E.; Fernández, Guillén

doi:10.1038/nn759

Cited by 658 publications

(475 citation statements)

References 44 publications

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“…Indeed, subdural ECoG recordings have demonstrated event-related gamma activity in topographic and temporal patterns that are consistent with the functional anatomy and processing dynamics of sensorimotor, auditory, visual, and language function (Crone et al, 2006), oculomotor function (Lachaux et al, 2006) and memory (Fell et al, 2001;Howard et al, 2003;Sederberg et al 2003;Mainy et al, 2007). From the perspective of ECoG, this gamma response is not limited to a single gamma band, e.g.…”

Section: Discussionmentioning

confidence: 58%

High-frequency gamma activity (80–150Hz) is increased in human cortex during selective attention

Ray

Niebur

Hsiao

et al. 2008

Clinical Neurophysiology

215

163

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Objective: To study the role of gamma oscillations (>30 Hz) in selective attention using subdural electrocorticography (ECoG) in humans. Methods:We recorded ECoG in human subjects implanted with subdural electrodes for epilepsy surgery. Sequences of auditory tones and tactile vibrations of 800 ms duration were presented asynchronously, and subjects were asked to selectively attend to one of the two stimulus modalities in order to detect an amplitude increase at 400 ms in some of the stimuli.Results: Event-related ECoG gamma activity was greater over auditory cortex when subjects attended auditory stimuli and was greater over somatosensory cortex when subjects attended vibrotactile stimuli. Furthermore, gamma activity was also observed over prefrontal cortex when stimuli appeared in either modality, but only when they were attended. Attentional modulation of gamma power began ∼400 ms after stimulus onset, consistent with the temporal demands on attention. The increase in gamma activity was greatest at frequencies between 80 and 150 Hz, in the so-called high gamma frequency range.Conclusions: There appears to be a strong link between activity in the high-gamma range (80-150 Hz) and selective attention.Significance: Selective attention is correlated with increased activity in a frequency range that is significantly higher than what has been reported previously using EEG recordings.

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Section: Discussionmentioning

confidence: 58%

High-frequency gamma activity (80–150Hz) is increased in human cortex during selective attention

Ray

Niebur

Hsiao

et al. 2008

Clinical Neurophysiology

215

163

View full text Add to dashboard Cite

show abstract

“…Gamma-band synchronization is observed during visual (Hoogenboom et al, 2006;Muthukumaraswamy et al, 2009), somatosensory (Bauer et al, 2006), and auditory (Brosch et al, 2002) stimulation; it is involved in memory processes (Fell et al, 2001;Howard et al, 2003) and motor control (Brown et al, 1998;Schoffelen et al, 2005). It is enhanced during attention (Fries et al, 2001;Bosman et al, 2012), and its moment-by-moment fluctuations predict the behavioral benefits of attention (Womelsdorf et al, 2006;Hoogenboom et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Visual stimulus eccentricity affects human gamma peak frequency

Pelt

Fries

2013

NeuroImage

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“…Recent iEEG studies have put a strong emphasis on gamma band activations in particular, in association with a wide range of cognitive processes, including memory (Fell et al, 2001;Howard et al, 2003;Mainy et al, 2007), visual attention and perception (Brovelli et al, 2005;Lachaux et al, 2000Lachaux et al, , 2005Tallon-Baudry et al, 2005;Tanji et al, 2005), audition (Bidet-Caulet et al, 2003;Edwards et al, 2005), somatosensory and motor processes Crone, Sinai and Korzeniewska, 2006;Lachaux et al, 2005;Aoki et al, 1999;Pfurtscheller et al, 2003;Szurhaj et al, 2005), and language . Importantly, in all those studies, gamma band activity was observed only in very specific brain regions, dependant on the tasks, and in good agreement with the functional networks revealed by fMRI .…”

Section: Introductionmentioning

confidence: 99%

Parieto-frontal gamma band activity during the perceptual emergence of speech forms

et al. 2008

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The multistable perception of speech refers to the perceptual changes experienced while listening to a speech form cycled in rapid and continuous repetition, the so-called Verbal Transformation Effect. Because distinct interpretations of the same repeated stimulus alternate spontaneously, this effect provides an invaluable tool to examine how speech percepts are formed in the listener's mind. In order to track the temporal dynamics of brain activity specifically linked to perceptual changes, intracerebral EEG activity was recorded from two implanted epileptic patients while performing a verbal transformation task. To this aim, they were asked to carefully listen to a speech sequence played repeatedly and to press a button whenever they perceived a change in the repeated utterance. For both patients, 300-800 ms prior to the reported perceptual transitions, high frequency activity in the gamma band range (> 40 Hz) was observed within the left inferior frontal and supramarginal gyri. An additional auditory decision task was used to rule out the possibility that the increased gamma band activity was due to the patients' motor responses. These results suggest that articulatory-based representations play a key part in the endogenously driven emergence of auditory speech percepts. The findings are interpreted in relation to theories assuming a link between perception and action in the human speech processing system.

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Human memory formation is accompanied by rhinal–hippocampal coupling and decoupling

Cited by 658 publications

References 44 publications

High-frequency gamma activity (80–150Hz) is increased in human cortex during selective attention

High-frequency gamma activity (80–150Hz) is increased in human cortex during selective attention

Visual stimulus eccentricity affects human gamma peak frequency

Parieto-frontal gamma band activity during the perceptual emergence of speech forms

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