Biomedical signal acquisition with streaming wireless communication for recording evoked potentials

Thie, Johnson; Klistorner, Alexander; Graham, Stuart L.

doi:10.1007/s10633-012-9345-y

Cited by 11 publications

(9 citation statements)

References 13 publications

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“…Work by Thie, Klistorner & Graham (2012) and Debener et al (2012) suggests that these systems are valid tools for measuring visual evoked potentials and EEG activity when walking outside a laboratory. However, to our knowledge, no study has validated the use of a gaming EEG system for measuring ERPs, perhaps because this requires a physical modification of the headset to insert stimulus markers into an EEG (see Equipment section below).…”

Section: Introductionmentioning

confidence: 99%

Validation of the Emotiv EPOC^®EEG gaming system for measuring research quality auditory ERPs

Badcock

Mousikou

Mahajan

et al. 2013

PeerJ

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Background. Auditory event-related potentials (ERPs) have proved useful in investigating the role of auditory processing in cognitive disorders such as developmental dyslexia, specific language impairment (SLI), attention deficit hyperactivity disorder (ADHD), schizophrenia, and autism. However, laboratory recordings of auditory ERPs can be lengthy, uncomfortable, or threatening for some participants – particularly children. Recently, a commercial gaming electroencephalography (EEG) system has been developed that is portable, inexpensive, and easy to set up. In this study we tested if auditory ERPs measured using a gaming EEG system (Emotiv EPOC®, ) were equivalent to those measured by a widely-used, laboratory-based, research EEG system (Neuroscan).Methods. We simultaneously recorded EEGs with the research and gaming EEG systems, whilst presenting 21 adults with 566 standard (1000 Hz) and 100 deviant (1200 Hz) tones under passive (non-attended) and active (attended) conditions. The onset of each tone was marked in the EEGs using a parallel port pulse (Neuroscan) or a stimulus-generated electrical pulse injected into the O1 and O2 channels (Emotiv EPOC®). These markers were used to calculate research and gaming EEG system late auditory ERPs (P1, N1, P2, N2, and P3 peaks) and the mismatch negativity (MMN) in active and passive listening conditions for each participant.Results. Analyses were restricted to frontal sites as these are most commonly reported in auditory ERP research. Intra-class correlations (ICCs) indicated that the morphology of the research and gaming EEG system late auditory ERP waveforms were similar across all participants, but that the research and gaming EEG system MMN waveforms were only similar for participants with non-noisy MMN waveforms (N = 11 out of 21). Peak amplitude and latency measures revealed no significant differences between the size or the timing of the auditory P1, N1, P2, N2, P3, and MMN peaks.Conclusions. Our findings suggest that the gaming EEG system may prove a valid alternative to laboratory ERP systems for recording reliable late auditory ERPs (P1, N1, P2, N2, and the P3) over the frontal cortices. In the future, the gaming EEG system may also prove useful for measuring less reliable ERPs, such as the MMN, if the reliability of such ERPs can be boosted to the same level as late auditory ERPs.

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Section: Introductionmentioning

confidence: 99%

Validation of the Emotiv EPOC^®EEG gaming system for measuring research quality auditory ERPs

Badcock

Mousikou

Mahajan

et al. 2013

PeerJ

Self Cite

333

227

View full text Add to dashboard Cite

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“…These systems are mainly marketed as gaming devices and the quality of the signal they capture is lower than the signal captured by more expensive equipment. However, recent research on evaluating the reliability of some of these low-cost EEG devices for research purposes has suggested that they are reliable for measuring EEG signals (Debener et al, 2012 ; Thie et al, 2012 ; Badcock et al, 2013 ). In the case of our study, the Emotiv EPOC device has provided several important pragmatic advantages compared with more expensive equipment: the setting up time of the Emotiv EPOC system at the beginning of each session is considerably shorter than that of an expensive EEG system (for which an experienced clinical professional can take up to an hour to place the electrodes on the patient's scalp, which results in long and tedious sessions).…”

Section: Methodsmentioning

confidence: 99%

Musical neurofeedback for treating depression in elderly people

et al. 2015

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We introduce a new neurofeedback approach, which allows users to manipulate expressive parameters in music performances using their emotional state, and we present the results of a pilot clinical experiment applying the approach to alleviate depression in elderly people. Ten adults (9 female and 1 male, mean = 84, SD = 5.8) with normal hearing participated in the neurofeedback study consisting of 10 sessions (2 sessions per week) of 15 min each. EEG data was acquired using the Emotiv EPOC EEG device. In all sessions, subjects were asked to sit in a comfortable chair facing two loudspeakers, to close their eyes, and to avoid moving during the experiment. Participants listened to music pieces preselected according to their music preferences, and were encouraged to increase the loudness and tempo of the pieces, based on their arousal and valence levels. The neurofeedback system was tuned so that increased arousal, computed as beta to alpha activity ratio in the frontal cortex corresponded to increased loudness, and increased valence, computed as relative frontal alpha activity in the right lobe compared to the left lobe, corresponded to increased tempo. Pre and post evaluation of six participants was performed using the BDI depression test, showing an average improvement of 17.2% (1.3) in their BDI scores at the end of the study. In addition, an analysis of the collected EEG data of the participants showed a significant decrease of relative alpha activity in their left frontal lobe (p = 0.00008), which may be interpreted as an improvement of their depression condition.

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“…The Emotiv EEG system was modified to send markers to the EEG to indicate the onset of each stimulus (Thie et al, 2012). This was achieved using a custom-made transmitter that converted the onset and offset of each tone into a positive and negative electrical signal.…”

Section: Methodsmentioning

confidence: 99%

Case study: auditory brain responses in a minimally verbal child with autism and cerebral palsy

et al. 2015

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An estimated 30% of individuals with autism spectrum disorders (ASD) remain minimally verbal into late childhood, but research on cognition and brain function in ASD focuses almost exclusively on those with good or only moderately impaired language. Here we present a case study investigating auditory processing of GM, a nonverbal child with ASD and cerebral palsy. At the age of 8 years, GM was tested using magnetoencephalography (MEG) whilst passively listening to speech sounds and complex tones. Where typically developing children and verbal autistic children all demonstrated similar brain responses to speech and nonspeech sounds, GM produced much stronger responses to nonspeech than speech, particularly in the 65–165 ms (M50/M100) time window post-stimulus onset. GM was retested aged 10 years using electroencephalography (EEG) whilst passively listening to pure tone stimuli. Consistent with her MEG response to complex tones, GM showed an unusually early and strong response to pure tones in her EEG responses. The consistency of the MEG and EEG data in this single case study demonstrate both the potential and the feasibility of these methods in the study of minimally verbal children with ASD. Further research is required to determine whether GM's atypical auditory responses are characteristic of other minimally verbal children with ASD or of other individuals with cerebral palsy.

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Biomedical signal acquisition with streaming wireless communication for recording evoked potentials

Abstract: The wireless acquisition system can reliably record visual evoked potentials. It has a constant delay of 20 ms and very low error rate.

Cited by 11 publications

References 13 publications

Validation of the Emotiv EPOC^®EEG gaming system for measuring research quality auditory ERPs

Validation of the Emotiv EPOC^®EEG gaming system for measuring research quality auditory ERPs

Musical neurofeedback for treating depression in elderly people

Case study: auditory brain responses in a minimally verbal child with autism and cerebral palsy

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Biomedical signal acquisition with streaming wireless communication for recording evoked potentials

Abstract: The wireless acquisition system can reliably record visual evoked potentials. It has a constant delay of 20 ms and very low error rate.

Cited by 11 publications

References 13 publications

Validation of the Emotiv EPOC®EEG gaming system for measuring research quality auditory ERPs

Validation of the Emotiv EPOC®EEG gaming system for measuring research quality auditory ERPs

Musical neurofeedback for treating depression in elderly people

Case study: auditory brain responses in a minimally verbal child with autism and cerebral palsy

Contact Info

Product

Resources

About

Validation of the Emotiv EPOC^®EEG gaming system for measuring research quality auditory ERPs

Validation of the Emotiv EPOC^®EEG gaming system for measuring research quality auditory ERPs