Brain state-triggered stimulus delivery: An efficient tool for probing ongoing brain activity. Andermann, M. L., Kauramäki, J., Palomäki, T., Moore, C. I., Hari, R., Jääskeläinen, I. P., & Sams, M. Open Journal of Neuroscience, September, 2012. abstract bibtex What is the relationship between variability in ongoing brain activity preceding a sensory stimulus and subsequent perception of that stimulus? A challenge in the study of this key topic in systems neuroscience is the relative rarity of certain brain 'states'-left to chance, they may seldom align with sensory presentation. We developed a novel method for studying the influence of targeted brain states on subsequent perceptual performance by online identification of spatiotemporal brain activity patterns of interest, and brain-state triggered presentation of subsequent stimuli. This general method was applied to an electroencephalography study of human auditory selective listening. We obtained online, time-varying estimates of the instantaneous direction of neural bias (towards processing left or right ear sounds). Detection of target sounds was influenced by pre-target fluctuations in neural bias, within and across trials. We propose that brain state-triggered stimulus delivery will enable efficient, statistically tractable studies of rare patterns of ongoing activity in single neurons and distributed neural circuits, and their influence on subsequent behavioral and neural responses.
@article{andermann_brain_2012,
title = {Brain state-triggered stimulus delivery: {An} efficient tool for probing ongoing brain activity},
volume = {2},
issn = {2075-9088},
shorttitle = {Brain state-triggered stimulus delivery},
abstract = {What is the relationship between variability in ongoing brain activity preceding a sensory stimulus and subsequent perception of that stimulus? A challenge in the study of this key topic in systems neuroscience is the relative rarity of certain brain 'states'-left to chance, they may seldom align with sensory presentation. We developed a novel method for studying the influence of targeted brain states on subsequent perceptual performance by online identification of spatiotemporal brain activity patterns of interest, and brain-state triggered presentation of subsequent stimuli. This general method was applied to an electroencephalography study of human auditory selective listening. We obtained online, time-varying estimates of the instantaneous direction of neural bias (towards processing left or right ear sounds). Detection of target sounds was influenced by pre-target fluctuations in neural bias, within and across trials. We propose that brain state-triggered stimulus delivery will enable efficient, statistically tractable studies of rare patterns of ongoing activity in single neurons and distributed neural circuits, and their influence on subsequent behavioral and neural responses.},
language = {eng},
journal = {Open Journal of Neuroscience},
author = {Andermann, M. L. and Kauramäki, J. and Palomäki, T. and Moore, C. I. and Hari, R. and Jääskeläinen, I. P. and Sams, M.},
month = sep,
year = {2012},
pmid = {23275858},
pmcid = {PMC3531547},
keywords = {auditory, brain-computer interface, online, prestimulus, spontaneous activity}
}
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