Comparison of a Novel Dry Electrode Headset to Standard Routine EEG in Veterans

Halford, Jonathan J.; Schalkoff, Robert J.; Satterfield, Kevin E.; Martz, Gabriel U.; Kutluay, Ekrem; Waters, Chad G.; Dean, Brian C.

doi:10.1097/wnp.0000000000000284

Cited by 20 publications

(16 citation statements)

References 7 publications

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“…Several groups have reported that signals recorded from dry electrodes are noisier 27,[50][51][52][53] . This is consistent with our findings of a larger number of artifactual segments with the dry EEG system for both visual tasks.…”

Section: Discussionmentioning

confidence: 99%

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Comparison between a wireless dry electrode EEG system with a conventional wired wet electrode EEG system for clinical applications

Hinrichs

Scholz

Baum

et al. 2020

Sci Rep

125

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Dry electrode electroencephalogram (EEG) recording combined with wireless data transmission offers an alternative tool to conventional wet electrode EEG systems. However, the question remains whether the signal quality of dry electrode recordings is comparable to wet electrode recordings in the clinical context. We recorded the resting state EEG (rsEEG), the visual evoked potentials (VEP) and the visual P300 (P3) from 16 healthy subjects (age range: 26-79 years) and 16 neurological patients who reported subjective memory impairment (age range: 50-83 years). Each subject took part in two recordings on different days, one with 19 dry electrodes and another with 19 wet electrodes. They reported their preferred EEG system. Comparisons of the rsEEG recordings were conducted qualitatively by independent visual evaluation by two neurologists blinded to the EEG system used and quantitatively by spectral analysis of the rsEEG. The P100 visual evoked potential (VEP) and P3 event-related potential (ERP) were compared in terms of latency, amplitude and pre-stimulus noise. The majority of subjects preferred the dry electrode headset. Both neurologists reported that all rsEEG traces were comparable between the wet and dry electrode headsets. Absolute Alpha and Beta power during rest did not statistically differ between the two EEG systems (p > 0.05 in all cases). However, Theta and Delta power was slightly higher with the dry electrodes (p = 0.0004 for Theta and p < 0.0001 for Delta). For ERPs, the mean latencies and amplitudes of the P100 VEP and P3 ERP showed comparable values (p > 0.10 in all cases) with a similar spatial distribution for both wet and dry electrode systems. These results suggest that the signal quality, ease of setup and portability of the dry electrode EEG headset used in our study comply with the needs of clinical applications. The quality of scalp electroencephalogram (EEG) recordings critically depends on the connection between the amplifier input and the skin surface. Wet electrodes that rely on conductive gel to guarantee low impedance levels (<10 KOhm) remain the gold standard for clinical recordings. However, EEG recording with wet electrodes requires skin abrasion, gel application, impedance optimization and cleaning after recording, all of which are time consuming. Trained EEG technicians are therefore recommended for wet electrode EEG setup and acquisition (for instance, see 1-3). However, this presents a barrier to realising diagnostic strategies that propose replacing EEG recordings in the clinic or the doctor's office with EEG recordings in the patient's home, which saves both time and costs as well as improving the patient's health care and comfort 4,5. To achieve reliable home-based EEG recording, electrodes must be easy to apply and provide stable data quality over long recording sessions. The same standards hold for other applications, including repeated EEG

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Section: Discussionmentioning

confidence: 99%

“…However, this study did not evaluate quantitative measures as well as artifact sensitivity. Halford et al 50 assessed practical aspects and the signal quality of spectral measures. They reported increased power in the dry recordings as compared to the wet recordings, in particular in lower (<4 Hz) frequencies and around 10 Hz.…”

Section: Discussionmentioning

confidence: 99%

Comparison between a wireless dry electrode EEG system with a conventional wired wet electrode EEG system for clinical applications

Hinrichs

Scholz

Baum

et al. 2020

Sci Rep

125

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“…The patients rated the comfort quite high, which is consistent with previous findings (Hairston et al, 2014;Nijboer et al, 2015;Oliveira et al, 2016), except for the dry pin electrodes in the OpenBCI headset, which was too uncomfortable to wear. The reported results related to the comfort of dry electrodes have been mixed, some studies found them not uncomfortable (Guger et al, 2012;Halford et al, 2016), others uncomfortable, especially when the headset had been worn for some time (30-90 min have been reported) (Hairston et al, 2014;Oliveira et al, 2016;Käthner et al, 2017;Radüntz and Meffert, 2019). It should be noted that the patients in our study only wore the headsets for 15 min, which is likely to be a bit shorter than a training session would last, and that the comfort is gradually reduced over time if electrodes are exerting pressure or if headsets are bulky (Mayaud et al, 2013;Hairston et al, 2014;Zander et al, 2017).…”

Section: Setup and User Evaluationmentioning

confidence: 99%

“…The therapist can then spend more time on other types of training and patients, or the patients could be training in their own home. Many of the caps currently commercially available may be difficult to mount by oneself since the electrodes must cover the motor cortex to record the electrical activity associated with attempted movements, and only a few comparisons between headsets or headset usability have been made (Ekandem et al, 2012;Mayaud et al, 2013;Das et al, 2014;Hairston et al, 2014;Nijboer et al, 2015;Halford et al, 2016;Izdebski et al, 2016;Pinegger et al, 2016;Käthner et al, 2017;Zander et al, 2017;Radüntz and Meffert, 2019). These studies relied on different metrics but often report on comfort and setup time.…”

Section: Introductionmentioning

confidence: 99%

“…Another aspect to consider is the aesthetics of the headset, which has been reported to be important (Nijboer et al, 2014). Most evaluations of headsets and electrode types used healthy subjects, but a few included veterans and severely motor impaired patients (Halford et al, 2016;Käthner et al, 2017), caregivers (Käthner et al, 2017). Only in two studies, participants -healthy volunteers -mounted the headset themselves (Zander et al, 2017;Radüntz and Meffert, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of EEG Headset Mounting for Brain-Computer Interface-Based Stroke Rehabilitation by Patients, Therapists, and Relatives

Jochumsen

Knoche

Kidmose

et al. 2020

Front. Hum. Neurosci.

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Brain-computer interfaces (BCIs) have successfully been used for motor recovery training in stroke patients. However, the setup of BCI systems is complex and may be divided into (1) mounting the headset and (2) calibration of the BCI. One of the major problems is mounting the headset for recording brain activity in a stroke rehabilitation context, and usability testing of this is limited. In this study, the aim was to compare the translational aspects of mounting five different commercially available headsets from a user perspective and investigate the design considerations associated with technology transfer to rehabilitation clinics and home use. No EEG signals were recorded, so the effectiveness of the systems have not been evaluated. Three out of five headsets covered the motor cortex which is needed to pick up movement intentions of attempted movements. The other two were as control and reference for potential design considerations. As primary stakeholders, nine stroke patients, eight therapists and two relatives participated; the stroke patients mounted the headsets themselves. The setup time was recorded, and participants filled in questionnaires related to comfort, aesthetics, setup complexity, overall satisfaction, and general design considerations. The patients had difficulties in mounting all headsets except for a headband with a dry electrode located on the forehead (control). The therapists and relatives were able to mount all headsets. The fastest headset to mount was the headband, and the most preferred headsets were the headband and a behind-ear headset (control). The most preferred headset that covered the motor cortex used water-based electrodes. The patients reported that it was important that they could mount the headset themselves for them to use it every day at home. These results have implications for design considerations for the development of BCI systems to be used in rehabilitation clinics and in the patient's home.

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Distributed Remote EEG Data Collection for NeuroIS Research: A Methodological Framework

Demazure

Karran

Boasen

et al. 2021

Augmented Cognition

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Comparison of a Novel Dry Electrode Headset to Standard Routine EEG in Veterans

Abstract: This DES, if improved, could be useful for a telemedicine approach to outpatient routine EEG recording within the Veterans Administration or other health system.

Cited by 20 publications

References 7 publications

Comparison between a wireless dry electrode EEG system with a conventional wired wet electrode EEG system for clinical applications

Comparison between a wireless dry electrode EEG system with a conventional wired wet electrode EEG system for clinical applications

Evaluation of EEG Headset Mounting for Brain-Computer Interface-Based Stroke Rehabilitation by Patients, Therapists, and Relatives

Distributed Remote EEG Data Collection for NeuroIS Research: A Methodological Framework

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