Top-down control of the phase of alpha-band oscillations as a mechanism for temporal prediction

Samaha, Jason; Bauer, Phoebe; Cimaroli, Sawyer; Postle, Bradley R.

doi:10.1073/pnas.1503686112

Cited by 238 publications

(217 citation statements)

References 55 publications

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“…Prior findings of long-distance phase coupling during spatial attention (Sauseng et al, 2005) may reflect a more general signature of the engagement of top–down control mechanisms in frontoparietal attentional systems (Kundu, Johnson, & Postle, 2014; Capotosto et al, 2009). Although alpha phase may be controlled in other ways (Samaha, Bauer, Cimaroli, & Postle, 2015; Bonnefond & Jensen, 2012), these findings suggest a privileged role for the dynamics of alpha-band power in the implementation of covert spatial attention.…”

Section: Discussionmentioning

confidence: 85%

Decoding and Reconstructing the Focus of Spatial Attention from the Topography of Alpha-band Oscillations

Samaha

Sprague

Postle

2016

Journal of Cognitive Neuroscience

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148

141

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Many aspects of perception and cognition are supported by activity in neural populations that are tuned to different stimulus features (e.g., orientation, spatial location, color). Goal-directed behavior, such as sustained attention, requires a mechanism for the selective prioritization of contextually appropriate representations. A candidate mechanism of sustained spatial attention is neural activity in the alpha band (8–13 Hz), whose power in the human EEG covaries with the focus of covert attention. Here, we applied an inverted encoding model to assess whether spatially selective neural responses could be recovered from the topography of alpha-band oscillations during spatial attention. Participants were cued to covertly attend to one of six spatial locations arranged concentrically around fixation while EEG was recorded. A linear classifier applied to EEG data during sustained attention demonstrated successful classification of the attended location from the topography of alpha power, although not from other frequency bands. We next sought to reconstruct the focus of spatial attention over time by applying inverted encoding models to the topography of alpha power and phase. Alpha power, but not phase, allowed for robust reconstructions of the specific attended location beginning around 450 msec postcue, an onset earlier than previous reports. These results demonstrate that posterior alpha-band oscillations can be used to track activity in feature-selective neural populations with high temporal precision during the deployment of covert spatial attention.

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Section: Discussionmentioning

confidence: 85%

Decoding and Reconstructing the Focus of Spatial Attention from the Topography of Alpha-band Oscillations

Samaha

Sprague

Postle

2016

Journal of Cognitive Neuroscience

Self Cite

148

141

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“…Rohenkohl and Nobre 2011;Samaha et al 2015). Rather, priors determined whether a specific phase angle facilitated a 'yes' or a 'no' judgment.…”

Section: Discussionmentioning

confidence: 99%

Rhythmic Influence of Top–Down Perceptual Priors in the Phase of Prestimulus Occipital Alpha Oscillations

Sherman

Kanai

Seth

et al. 2016

Journal of Cognitive Neuroscience

108

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Prior expectations have a powerful influence on perception, biasing both decision and confidence. However, how this occurs at the neural level remains unclear. It has been suggested that spontaneous alpha-band neural oscillations represent rhythms of the perceptual system that periodically modulate perceptual judgments. We hypothesized that these oscillations instantiate the effects of expectations. While collecting scalp EEG, participants performed a detection task that orthogonally manipulated perceptual expectations and attention. Trial-by-trial retrospective confidence judgments were also collected. Results showed that, independent of attention, prestimulus occipital alpha phase predicted the weighting of expectations on yes/no decisions. Moreover, phase predicted the influence of expectations on confidence. Thus, expectations periodically bias objective and subjective perceptual decision-making together before stimulus onset. Our results suggest that alpha-band neural oscillations periodically transmit prior evidence to visual cortex, changing the baseline from which evidence accumulation begins. In turn, our results inform accounts of how expectations shape early visual processing.

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“…Attention can be viewed as a dynamic process that entrains to the periodicity of information availability (e.g., Agostino et al, 2008;Coull & Nobre, 1998;Cravo et al, 2013;Escoffier et al, 2010Escoffier et al, , 2015Henry & Hermann, 2014;Samaha et al, 2015). As such, oscillations in attention can be driven and/or synchronized with ongoing oscillations used as the time base for interval timing (Gu et al, 2015b).…”

Section: Effects Of Electric Shock On Interval Timingmentioning

confidence: 99%

Clock Speed as a Window into Dopaminergic Control of Emotion and Time Perception

Cheng

Tipples

Narayanan

et al. 2016

Timing Time Percept

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Although fear-producing treatments (e.g., electric shock) and pleasure-inducing treatments (e.g., methamphetamine) have different emotional valences, they both produce physiological arousal and lead to effects on timing and time perception that have been interpreted as reflecting an increase in speed of an internal clock. In this commentary, we review the results reported by Fayolle et al. (2015): Behav. Process., 120, 135-140) and Meck (1983: J. Exp. Psychol. Anim. Behav. Process., 9, 171-201) using electric shock and by Maricq et al. (1981: J. Exp. Psychol. Anim. Behav. Process., 7, 18-30) using methamphetamine in a duration-bisection procedure across multiple duration ranges. The psychometric functions obtained from this procedure relate the proportion 'long' responses to signal durations spaced between a pair of 'short' and 'long' anchor durations. Horizontal shifts in these functions can be described in terms of attention or arousal processes depending upon whether they are a fixed number of seconds independent of the timed durations (additive) or proportional to the durations being timed (multiplicative). Multiplicative effects are thought to result from a change in clock speed that is regulated by dopamine activity in the medial prefrontal cortex. These dopaminergic effects are discussed within the context of the striatal beat frequency model of interval timing (Matell & Meck, 2004: Cogn. Brain Res., 21, 139-170) and clinical implications for the effects of emotional reactivity on temporal cognition (Parker et al., 2013: Front. Integr. Neurosci., 7, 75).

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Top-down control of the phase of alpha-band oscillations as a mechanism for temporal prediction

Cited by 238 publications

References 55 publications

Decoding and Reconstructing the Focus of Spatial Attention from the Topography of Alpha-band Oscillations

Decoding and Reconstructing the Focus of Spatial Attention from the Topography of Alpha-band Oscillations

Rhythmic Influence of Top–Down Perceptual Priors in the Phase of Prestimulus Occipital Alpha Oscillations

Clock Speed as a Window into Dopaminergic Control of Emotion and Time Perception

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