Investigating the possible effect of electrode support structure on motion artifact in wearable bioelectric signal monitoring

Abstract

Background: With advances in technology and increasing demand, wearable biosignal monitoring is developing and new applications are emerging. One of the main challenges facing the widespread use of wearable monitoring systems is the motion artifact. The sources of the motion artifact lie in the skin-electrode interface. Reducing the motion and deformation at this interface should have positive effects on signal quality. In this study, we aim to investigate whether the structure supporting the electrode can be designed to reduce the motion artifact with the hypothesis that this can be achieved by stabilizing the skin deformations around the electrode.

Concealed, Unobtrusive Ear-Centered EEG Acquisition: cEEGrids for Transparent EEG

“…Motion of sensors, and motion of parts of the measurement system, however, may contribute strong interference and corrupt signals to an extend that the underlying brain activity cannot be recovered (Kline et al, 2015). New hardware solutions that account for sensor motion (Yazicioglu et al, 2010; Reis et al, 2014; Cömert and Hyttinen, 2015; Goverdovsky et al, 2015) and miniaturized amplifier solutions featuring shielding and active amplification (Metting van Rijn et al, 1990) may help to alleviate this problem further. In our experience, light-weight head-mounted systems that wirelessly transmit amplified EEG signals may give rise to reasonable motion-tolerance (Debener et al, 2012).…”

“…Besides electromyogram (EMG) artifacts caused by muscle activity, movement artifacts in EEG may originate either from the movement of the electrodes relative to the skin or movements of the cables (Ödman and Åke Öberg, 1982; Simakov and Webster, 2010; Cömert and Hyttinen, 2015). …”

“…In this regard, EEG has a clear advantage over MRI or MEG since it can be made portable and has a higher motion tolerance. Several developments such as active or shielded electrodes (Metting van Rijn et al, 1990) and new sensor technology (Cömert and Hyttinen, 2015; Goverdovsky et al, 2015) may increase the degree of motion-tolerance even further. Here, we refer to mobile EEG as a technology that does not require the user to remain still.…”

A Novel 12-Lead ECG T-Shirt with Active Electrodes

“…Another reason could be a subpar electrode contact leading to signal deformation, which is determined by the electrode-body interface [14,29]. Sufficient and constant contact pressure is known to be important for textile ECG measurements [1,11,30]. Assuming that the electrodes are the reason for the deformations, the results from Tables 2 and 3 were examined.…”

Electrical impedance performance of metal dry bioelectrode with different surface coatings

“…These bioelectrodes could not conform to the irregular surface of skin during movement and the additional noise gets [10]. In recent years, there is a growing interest in the development of novel dry bioelectrodes, including foam backing dry bioelectrodes [11][12][13], fabric dry bioelectrodes [14] and microstructure dry bioelectrodes [15]. Among these bioelectrodes, the dry bioelectrodes with microstructure array show outstanding advantages of collect biosignal with less noise.…”