Human gamma-frequency oscillations associated with attention and memory

Jensen, Ole; Kaiser, Jochen; Lachaux, Jean-Philippe

doi:10.1016/j.tins.2007.05.001

Cited by 1,032 publications

(760 citation statements)

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“…The power of gamma activity is increased during cognitive processes [Corbetta and Shulman, 2002]. Previous studies have reported associations between attention and gamma frequency synchronization to integrate neural assemblies associated with a specific sensory object [Jensen et al, 2007], and gamma band changes have been reported across the visual cortex, frontal eye fields, SPL, and dorsal lateral prefrontal cortex [Buschman and Miller, 2007; Ossandon et al, 2012]. The decreased power in low‐frequency bands and increased power in high‐frequency bands in this study is compatible with these findings and shows that common brain areas were actively involved during the two tasks.…”

Section: Discussionmentioning

confidence: 99%

Neural correlates of spatial and nonspatial attention determined using intracranial electroencephalographic signals in humans

Park

Kim

Park

et al. 2016

Human Brain Mapping

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Few studies have directly compared the neural correlates of spatial attention (i.e., attention to a particular location) and nonspatial attention (i.e., attention to a feature in the visual scene) using well‐controlled tasks. Here, we investigated the neural correlates of spatial and nonspatial attention in humans using intracranial electroencephalography. The topography and number of electrodes showing significant event‐related desynchronization (ERD) or event‐related synchronization (ERS) in different frequency bands were studied in 13 epileptic patients. Performance was not significantly different between the two conditions. In both conditions, ERD in the low‐frequency bands and ERS in the high‐frequency bands were present bilaterally in the parietal cortex (prominently on the right hemisphere) and frontal regions. In addition to these common changes, spatial attention involved right‐lateralized activity that was maximal in the right superior parietal lobule (SPL), whereas nonspatial attention involved wider brain networks including the bilateral parietal, frontal, and temporal regions, but still had maximal activity in the right parietal lobe. Within the parietal lobe, spatial attention involved ERD or ERS in the right SPL, whereas nonspatial attention involved ERD or ERS in the right inferior parietal lobule. These findings reveal that common as well as different brain networks are engaged in spatial and nonspatial attention. Hum Brain Mapp 37:3041–3054, 2016. © 2016 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc.

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Section: Discussionmentioning

confidence: 99%

Neural correlates of spatial and nonspatial attention determined using intracranial electroencephalographic signals in humans

Park

Kim

Park

et al. 2016

Human Brain Mapping

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“…Accordingly, the higher iGBA amplitude for human faces might reflect the analysis of this information that is not necessary for the categorization of objects. Another process that may be reflected by the increase in iGBA is the allocation of attention, since iGBA has been shown to be modulated by attention Tiitinien et al, 1993, Fan et al 2007, Jensen et al 2007). However, although some have showed that faces "pop-out" in a visual search task when presented among other stimuli (Hershler and Hochstein (2005), others suggested that this effect can be attributed to low-level vision characteristics (VanRullen, in press).…”

Section: Discussionmentioning

confidence: 99%

“…The amplitude of these bursts is modulated by physical stimulus attributes such as size, contrast and spatial-frequency spectrum (Gray et al, 1990;Bauer et al, 1995, Busch et al, 2004, perceptual factors acting bottom-up, such as the ability to form coherent gestalts Tallon-Baudry et al, 1996), and top-down acting factors such as attention Tiitinien et al, 1993, Fan et al 2007 or memory (Osipova et al, 2006;Gruber and Müller 2006;Gruber et al, 2004;TallonBaudry et al, 1998, 2001, Jensen et al 2007. In concert, these bottom-up and top-down modulations raised the hypothesis that iGBA reflects the integration of sensory input with preexistent memory representations to form experienced entities (Tallon-Baudry 1997, 2003).…”

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confidence: 99%

Human face preference in gamma-frequency EEG activity

et al. 2008

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Previous studies demonstrated that induced EEG activity in the gamma band (iGBA) plays an important role in object recognition and is modulated by stimulus familiarity and its compatibility with pre-existent representations. In the present study we investigated the modulation of iGBA by the degree of familiarity and perceptual expertise that observers have with stimuli from different categories. Specifically, we compared iGBA in response to human faces versus stimuli which subjects are not expert with (ape faces, human hands, buildings and watches). iGBA elicited by human faces was higher and peaked earlier than that elicited by all other categories, which did not differ significantly from each other. These findings can be accounted for by two characteristics of perceptual expertise. One is the activation of a richer, stronger and, therefore, more easily accessible mental representation of human faces. The second is the more detailed perceptual processing necessary for within-category distinctions, which is the hallmark of perceptual expertise. In addition, the sensitivity of iGBA to human but not ape faces was contrasted with the face-sensitive N170-effect, which was similar for human and ape faces. In concert with previous studies, this dissociation suggests a multi-level neuronal model of face recognition, manifested by these two electrophysiological measures, discussed in this paper.Cognitive neuroscience research has been enriched during the last decade by studies associating high-frequency EEG activity with the generation of unified perceptual representations in both vision and audition, and the activation of pre-stored memory representations (Busch, et al., 2006;Kaiser and Lutzenberger, 2003). Changing the conception that physiologically pertinent EEG frequencies are lower than 20 Hz, studies in animals (Singer and Gray, 1995) and in humans (e.g. Tallon-Baudry et al., 1996, 2003Gruber et al. 2004Gruber et al. , 2005Rodriguez et al. 1999) explored activity in a range of frequencies higher than 20 Hz, which were addressed as "gamma-band". Specifically, many studies have associated between high-level perceptual mechanisms and the so-called "induced" gamma-band activity (iGBA; for review see Bertrand and Tallon-Baudry, 2000).iGBA is a measure for local neural synchronization appearing as bursts of high-frequency EEG activity which is event-related but is not necessarily phase locked to the stimulus onset (and thus may be cancelled out in traditional ERP analysis). The amplitude of these bursts is modulated by physical stimulus attributes such as size, contrast and spatial-frequency spectrum

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“…Cortical gamma-band activity in general has been found to be involved in many cortical processes (Tallon-Baudry, 2009;Fries, 2009), and might serve as a mechanism for efficient neuronal communication and processing (Fries, 2005). Gamma activity has been related to important brain functions such as visual (Hoogenboom et al, 2006) and tactile processing (Bauer et al, 2006), memory (Jensen et al, 2007;van der Werf et al, 2008), attention (Fries et al, 2001), and motor control (Schoffelen et al, 2005). Behaviorally, the strength of gamma correlates with reaction times (Womelsdorf et al, 2006;Hoogenboom et al, 2010).…”

Section: Eccentricity Effectmentioning

confidence: 99%