Human cortical dynamics during full-body heading changes

Gramann, Klaus; Hohlefeld, Friederike U.; Gehrke, Lukas; Klug, Marius

doi:10.1038/s41598-021-97749-8

Cited by 38 publications

(43 citation statements)

References 58 publications

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“…Expectation can modulate the effects that radially expanding optic flow has on postural sway and event-related desynchronization of the alpha band (Obereisenbuchner et al, 2021). Recent studies have found that behavioural and electrophysical markers of cognition are markedly different in dynamic and virtual environments compared with simpler lab set ups (Draschkow et al, 2021;Gramann et al, 2021).…”

Section: Attention and Dynamic Visual Stimulationmentioning

confidence: 99%

Elements of exogenous attentional cueing preserved during optokinetic motion of the visual scene

Mastropasqua

Vural

Taylor

2022

Eur J of Neuroscience

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Navigating through our environment raises challenges for perception by generating salient background visual motion and eliciting prominent eye movements to stabilise the retinal image. It remains unclear if exogenous spatial attentional orienting is possible during background motion and the eye movements it causes and whether this compromises the underlying neural processing. To test this, we combined exogenous orienting, visual scene motion, and electroencephalography (EEG). A total of 26 participants viewed a background of moving black and grey bars (optokinetic stimulation). We tested for effects of non-spatially predictive peripheral cueing on visual motion discrimination of a target dot, presented either at the same (valid) or opposite (invalid) location as the preceding cue. Valid cueing decreased reaction times not only when participants kept their gaze fixed on a central point (fixation blocks) but also even when there was no fixation point, so that participants performed intensive, repetitive tracking eye movements (eye movement blocks). Overall, manual response reaction times were slower during eye movements. Cueing also produced reliable effects on neural activity on either block, including within the first 120 ms of neural processing of the target. The key pattern with larger event-related potential (ERP) amplitudes on invalid versus valid trials showed that the neural substrate of exogenous cueing was highly similar during eye movements or fixation. Exogenous peripheral cueing

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Section: Attention and Dynamic Visual Stimulationmentioning

confidence: 99%

Elements of exogenous attentional cueing preserved during optokinetic motion of the visual scene

Mastropasqua

Vural

Taylor

2022

Eur J of Neuroscience

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“…This is an open data set available at http://dx.doi.org/10.14279/depositonce-10493 (Gramann et al, 2021)…”

Section: Eeg Study IImentioning

confidence: 99%

“…This is an open data set available at http://dx.doi.org/10.14279/depositonce-10493 (Gramann et al, 2021). Data of 19 participants (aged 20-46 years, mean 30.3 years, 10 female and 9 male) are available, which we all used.…”

Section: Example Applicationsmentioning

confidence: 99%

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Zapline-plus: a Zapline extension for automatic and adaptive removal of frequency-specific noise artifacts in M/EEG

Klug

Kloosterman

2021

Preprint

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Removing power line and other frequency-specific artifacts from electrophysiological data without affecting neural signals remains a challenging task. Recently, an approach was introduced that combines spectral and spatial filtering to effectively remove line noise: Zapline (de Cheveigné, 2020). This algorithm, however, requires manual selection of the noise frequency and the number of spatial components to remove during spatial filtering. Moreover, it assumes that noise frequency and spatial topography are stationary over time, which is often not warranted. To overcome these issues, we introduce Zapline-plus, which allows adaptive and automatic removal of frequency-specific noise artifacts from M/EEG data. To achieve this, our extension first searches for peaks in the spectrum, then applies Zapline iteratively to chunks of data to account for non-stationarity of the noise over time. Likewise, the exact noise frequency around the found target frequency is determined separately for every chunk to allow fluctuations of the peak noise frequency. The number of to-be-removed components is automatically determined using an outlier detection algorithm. Finally, the frequency spectrum after cleaning is analyzed for sub-optimal cleaning and parameters are adapted accordingly before re-running the process if necessary. The software creates a detailed plot for analysis of the cleaning that can be used to inform manual changes. We showcase the efficacy of the different features of our algorithm by applying it to four openly available data sets, two EEG sets containing both stationary and mobile conditions, and two MEG sets.

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“…One harsh restriction compared to true natural conditions was the head rest. Without this restriction we would expect increased EEG noise due to muscle movements and physical motion of the cables and sensors, but importantly also brain activity related to the motion and repositioning of the head (Gramann et al, 2021). On the other hand, being asked to hold the head still over a long period might result in fatigue or stiffening neck muscles, thereby introducing noise in the EEG and potentially also lowering engagement or aesthetic appeal.…”

Section: Potentially Problematic Effects Of Other Experimental Conditions In the Present Studymentioning

confidence: 99%

Naturalistic viewing conditions can increase task engagement and aesthetic preference but have only minimal impact on EEG Quality

Welke

Vessel

2021

Preprint

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Free gaze and the use of dynamically changing video stimuli are typically avoided in EEG exper- iments to avoid artefacts and confounds related to uncontrolled eye movements. Yet, often it is unclear whether these artificial secondary manipulations might have unwanted effects on the pri- mary measures of interest and for a growing number of research questions removing them would be beneficial: Among those is the investigation of visual aesthetic experiences, which typically involve open-ended exploration of highly variable stimuli. Here we aimed to quantify the effect of fixation task and using still vs. movie stimuli on EEG signal quality and several behavioral and physiological measures of interest during an aesthetic rating task. Participants observed scenes from landscapes and dance performances and rated each stimulus for both aesthetic appeal and their state of boredom while watching it. The scenes were presented either as dynamic video clips or static pictures, and participants observed them either with unconstrained gaze or under attempted fixation We recorded EEG, ECG and eyetracking from 43 participants. An auditory stream of 40Hz amplitude modulated pink noise was played during each trial and signal-to-noise-ratio (SNR) of the auditory steady-state response measured at the scalp was extracted as a proxy measure for overall EEG signal quality. The study including hypotheses and a priori power analysis was preregistered. We found that both behavioral ratings were influenced by the experimental conditions: boredom and aesthetic ratings were positively affected by dynamic video stimuli, indicating that these are experienced as more engaging; both these effects were stronger in dance. As already reported before, landscape stimuli were experienced as more appealing. Fixaton task, on the other hand, had no significant effect on the ratings which is encouraging given how canonically it is applied. Eye movements were significantly affected not only by viewing task, but by stimulus dynamics and content as well: we observed fewer eyeblinks, saccades and microsaccades in video stimuli, and fewer saccades but more microsaccades in dance than in landscape stimuli, with several significant interactions. EEG SNR, to our surprise, was barely affected by fixation task - despite only minimal preprocessing and no trial rejection. We nevertheless believe that the new metric is sensitive to capture noise: it was significantly correlated with the number of eye blinks, and after cleaning the dataset with an ICA based preprocessing pipeline the significant effect of fixation task and the correlation with blink rate vanished. We see these as promising results indicating that at least in the lab more liberal experimental conditions could be achieved without significant loss of signal quality. Specifically the use of dynamic video material bears a lot of potential for future investigations in human neurophysiological studies.

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Human cortical dynamics during full-body heading changes

Cited by 38 publications

References 58 publications

Elements of exogenous attentional cueing preserved during optokinetic motion of the visual scene

Elements of exogenous attentional cueing preserved during optokinetic motion of the visual scene

Zapline-plus: a Zapline extension for automatic and adaptive removal of frequency-specific noise artifacts in M/EEG

Naturalistic viewing conditions can increase task engagement and aesthetic preference but have only minimal impact on EEG Quality

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