Influences of encoding and retrieval on the steady-state visual evoked potential

Martens, Ulla; Gert, Anna L.; Gruber, Thomas

doi:10.1097/wnr.0b013e3283516542

Cited by 8 publications

(8 citation statements)

References 20 publications

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“…Indeed, the P3 response seems to involve a sequential activation of cortical areas compared to SSVEP response which seems to rely less on cognitive abilities [34], [35], [77], [78].…”

Section: Discussionmentioning

confidence: 99%

A Comparison of Two Spelling Brain-Computer Interfaces Based on Visual P3 and SSVEP in Locked-In Syndrome

et al. 2013

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ObjectivesWe study the applicability of a visual P3-based and a Steady State Visually Evoked Potentials (SSVEP)-based Brain-Computer Interfaces (BCIs) for mental text spelling on a cohort of patients with incomplete Locked-In Syndrome (LIS).MethodsSeven patients performed repeated sessions with each BCI. We assessed BCI performance, mental workload and overall satisfaction for both systems. We also investigated the effect of the quality of life and level of motor impairment on the performance.ResultsAll seven patients were able to achieve an accuracy of 70% or more with the SSVEP-based BCI, compared to 3 patients with the P3-based BCI, showing a better performance with the SSVEP BCI than with the P3 BCI in the studied cohort. Moreover, the better performance of the SSVEP-based BCI was accompanied by a lower mental workload and a higher overall satisfaction. No relationship was found between BCI performance and level of motor impairment or quality of life.ConclusionOur results show a better usability of the SSVEP-based BCI than the P3-based one for the sessions performed by the tested population of locked-in patients with respect to all the criteria considered. The study shows the advantage of developing alternative BCIs with respect to the traditional matrix-based P3 speller using different designs and signal modalities such as SSVEPs to build a faster, more accurate, less mentally demanding and more satisfying BCI by testing both types of BCIs on a convenience sample of LIS patients.

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“…Indeed, the P3 response seems to involve a sequential activation of cortical areas compared to SSVEP response which seems to rely less on cognitive abilities [34], [35], [77], [78].…”

Section: Discussionmentioning

confidence: 99%

A Comparison of Two Spelling Brain-Computer Interfaces Based on Visual P3 and SSVEP in Locked-In Syndrome

et al. 2013

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“…steady) oscillatory response is characterized by a good signal-to-noise ratio which reveals reliable results even with a limited amount of trials [17]. In a series of previous studies it was demonstrated that SSVEP modulations are sensitive to successful object recognition [18], implicit mechanisms underlying object recognition [9] and mnemonic functioning [17], [19].…”

Section: Introductionmentioning

confidence: 97%

Implicit and Explicit Contributions to Object Recognition: Evidence from Rapid Perceptual Learning

et al. 2012

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The present study investigated implicit and explicit recognition processes of rapidly perceptually learned objects by means of steady-state visual evoked potentials (SSVEP). Participants were initially exposed to object pictures within an incidental learning task (living/non-living categorization). Subsequently, degraded versions of some of these learned pictures were presented together with degraded versions of unlearned pictures and participants had to judge, whether they recognized an object or not. During this test phase, stimuli were presented at 15 Hz eliciting an SSVEP at the same frequency. Source localizations of SSVEP effects revealed for implicit and explicit processes overlapping activations in orbito-frontal and temporal regions. Correlates of explicit object recognition were additionally found in the superior parietal lobe. These findings are discussed to reflect facilitation of object-specific processing areas within the temporal lobe by an orbito-frontal top-down signal as proposed by bi-directional accounts of object recognition.

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“…In general, SSVEP studies have revealed that amplitude modulations at the driving frequencies reflect attentional processing (Hillyard et al 1997;Morgan et al 1996;Müller et al 2003;Müller and Hillyard 2000; for a review see Vialatte et al 2010), memory (Martens et al 2012;Silberstein et al 2001) and object recognition (Kaspar et al 2010). The application of the SSVEP approach in multi-stimulus paradigms is suitable to measure brain activity related specifically to each stimulus separately.…”

Section: Introductionmentioning

confidence: 99%

Electrophysiological correlates of gist perception: a steady-state visually evoked potentials study

Radtke

Schöne

Martens³

et al. 2020

Exp Brain Res

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Gist perception refers to perceiving the substance or general meaning of a scene. To investigate its neuronal mechanisms, we used the steady-state visually evoked potential (SSVEP) method—an evoked oscillatory cortical response at the same frequency as a visual stimulus flickered at this frequency. Two neighboring stimuli were flickered at different frequencies f1 and f2, for example, a drawing of a sun on the left side of the screen flickering at 8.6 Hz and the drawing of a parasol on the right side of the screen flickering at 12 Hz. SSVEPs enabled us to separate the responses to the two distinct stimuli by extracting oscillatory brain responses at f1 and f2. Additionally, it allowed to investigate intermodulation frequencies, that is, the brain’s response at a linear combination of f1 and f2 (here at f1 + f2 = 20.6 Hz) as an indicator of processing shared aspects of the input, that is, gist perception (here: a beach scene). We recorded high-density EEG of 18 participants. Results revealed clear and separable neuronal oscillations at f1 and f2. Additionally, occipital electrodes showed increased amplitudes at the intermodulation frequency in related as compared to unrelated pairs. The increase in intermodulation frequency was associated with bilateral temporal and parietal lobe activation, probably reflecting the interaction of local object representations as a basis for activating the gist network. The study demonstrates that SSVEPs are an excellent method to unravel mechanisms underlying the processing within multi-stimulus displays in the context of gist perception.

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Influences of encoding and retrieval on the steady-state visual evoked potential

Cited by 8 publications

References 20 publications

A Comparison of Two Spelling Brain-Computer Interfaces Based on Visual P3 and SSVEP in Locked-In Syndrome

A Comparison of Two Spelling Brain-Computer Interfaces Based on Visual P3 and SSVEP in Locked-In Syndrome

Implicit and Explicit Contributions to Object Recognition: Evidence from Rapid Perceptual Learning

Electrophysiological correlates of gist perception: a steady-state visually evoked potentials study

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