A comparison of EOG baseline drift mitigation techniques

Barbara, Nathaniel; Camilleri, Tracey A.; Camilleri, Kenneth P.

doi:10.1016/j.bspc.2019.101738

Cited by 32 publications

(20 citation statements)

References 18 publications

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“…When a neuron from the spinal cord sends a neuromuscular signal to induce muscle contractions or eye movement, a small potential difference on the skin surfaces could be detected by micro-biosensors. For the details of the theory, please see the Supporting Information S2 (Figures S2 and S3 and Scheme S2, the theoretical principles, measuring devices and circuits, and videos) . On the other hand, if electrostimulation was applied to the muscle, it would induce muscle contractions and interfere with the transmission of the pain to the brain.…”

Section: Resultsmentioning

confidence: 99%

“…For the details of the theory, please see the Supporting Information S2 (Figures S2 and S3 and Scheme S2, the theoretical principles, measuring devices and circuits, and videos). 40 On the other hand, if electrostimulation was applied to the muscle, it would induce muscle contractions and interfere with the transmission of the pain to the brain. Since the mechanical strength of MXene is not enough for forming a "needle", a biodegradable PLA base support was used.…”

Section: Resultsmentioning

confidence: 99%

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MXene Nanosheet-Based Microneedles for Monitoring Muscle Contraction and Electrostimulation Treatment

Yang

Lin

et al. 2021

ACS Appl. Nano Mater.

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MXenes belong to a large family of two-dimensional layered transition-metal carbides and nitrides. MXene nanosheets integrate the fascinating advantages of high electronic conductivity, excellent biocompatibility, and acid/base resistance. Herein, we demonstrate a “hospital-on-a-chip” system with multifunctional microneedle electrodes for biosensing and electrostimulation using highly stable MXene nanosheets. This system consists of integrated microchip biosensors for an efficient diagnosis and medical treatment elements for therapies, thus resembling a miniaturized hospital. Microneedles are composed of dozens of micron-sized needles that can be used as an effective and painless transdermal patch to puncture the dead skin barrier for drug delivery or biosensing purposes since they are directly in contact with the dermal layer inside the human body. The wearable MXene nanosheet-based microneedles can sense the tiny electric potential difference generated from the human eye movements or muscle contraction from the human arm. Therefore, the diseases associated with neuromuscular abnormalities such as myasthenia gravis can be monitored. Consequently, the transcutaneous electrical nerve stimulation treatment can be applied according to the feedback of the micro-biosensors. In addition, MXene microneedles can offer an electrically controlled drug delivery platform and the function of enhancing blood coagulation. Finally, MXene nanosheet-based microneedles provide an interesting platform for wearable micro-biosensors and offer an essential part of the hospital-on-a-chip system.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

MXene Nanosheet-Based Microneedles for Monitoring Muscle Contraction and Electrostimulation Treatment

Yang

Lin

et al. 2021

ACS Appl. Nano Mater.

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“…There have been many efforts to extend calibration validity by careful removal of baseline drift (Barbara et al, 2020a) or consideration of the statistics of saccades (Hládek et al, 2018), but these techniques still rely on the constancy of a laboratory calibration of scale (be it polynomial coefficients or battery model parameters). Thus, given the inevitability of sweat and lighting changes in free-living conditions, EOGbased eye tracking has been limited to laboratories and relatively short durations between re-calibrations.…”

Section: Introductionmentioning

confidence: 99%

Using natural head movements to continually calibrate EOG signals

Nezvadovitz

Rao

2022

JEMR

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Electrooculography (EOG) is the measurement of eye movements using surface electrodes adhered around the eye. EOG systems can be designed to have an unobtrusive form-factor that is ideal for eye tracking in free-living over long durations, but the relationship between voltage and gaze direction requires frequent re-calibration as the skin-electrode impedance and retinal adaptation vary over time. Here we propose a method for automatically calibrating the EOG-gaze relationship by fusing EOG signals with gyroscopic measurements of head movement whenever the vestibulo-ocular reflex (VOR) is active. The fusion is executed as recursive inference on a hidden Markov model that accounts for all rotational degrees-of-freedom and uncertainties simultaneously. This enables continual calibration using natural eye and head movements while minimizing the impact of sensor noise. No external devices like monitors or cameras are needed. On average, our method’s gaze estimates deviate by 3.54° from those of an industry-standard desktop video-based eye tracker. Such discrepancy is on par with the latest mobile video eye trackers. Future work is focused on automatically detecting moments of VOR in free-living.

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“…The use of these tools is particularly useful for people suffering from neurological disorders because patients in locked-in state may not be able to speak or move but they could interact through an auditory communication system [13]. Moreover, software tools for the recognition of eye movements are used as standard interfaces for quadcopter navigation [14], and different techniques for baseline drift mitigation of the EOG signal are compared in the review proposed by Barbara et al [15].…”

Section: Introductionmentioning

confidence: 99%

A Matlab-Based Gui for Remote Electrooculography Visual Examination

Stula¹,

Proto²,

Kubíček

et al. 2021

Clin Tech

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In this work, a MATLAB-based graphical user interface is proposed for the visual examination of several eye movements. The proposed solution is algorithm-based, which localizes the area of the eye movement, removes artifacts, and calculates the view trajectory in terms of direction and orb deviation. To compute the algorithm, a five-electrode configuration is needed. The goodness of the proposed MATLAB-based graphical user interface has been validated, at the Clinic of Child Neurology of University Hospital of Ostrava, through the EEG Wave Program, which was considered as “gold standard” test. The proposed solution can help physicians on studying cerebral diseases, or to be used for the development of human-machine interfaces useful for the improvement of the digital era that surrounds us today.

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A comparison of EOG baseline drift mitigation techniques

Cited by 32 publications

References 18 publications

MXene Nanosheet-Based Microneedles for Monitoring Muscle Contraction and Electrostimulation Treatment

MXene Nanosheet-Based Microneedles for Monitoring Muscle Contraction and Electrostimulation Treatment

Using natural head movements to continually calibrate EOG signals

A Matlab-Based Gui for Remote Electrooculography Visual Examination

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