Wireless electronic-tattoo for long-term high fidelity facial muscle recordings

Inzelberg, Lilah; Pur, Moshe David; Steinberg, Stanislav; Rand, David G.; Farah, Maroun; Hanein, Yael

doi:10.1117/12.2263522

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…The electrode arrays and the miniature data acquisition unit (DAU) that were tested in this study were purchased from X-trodes Inc. The sensors were previously described in [27,28]. The sensors were developed for various applications, such as sleep monitoring, emotional affect detection, and smile mapping [29][30][31].…”

Section: Multi-array Semg Systemmentioning

confidence: 99%

“…Wearable sEMG with high resolution and stability against sweating and movements suitable for convenient application to the face opens a wide range of opportunities, particularly in examining subjects' facial expressions during intense exercise. In this investigation, we used a novel soft sensor for the high-resolution recording of surface electromyography from the face [27,28] to resolve the challenges described above. The technique utilizes a soft, high-density printed dry electrode array.…”

Section: Introductionmentioning

confidence: 99%

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Facial electromyography during exercise using soft electrode array: A feasibility study

Ibrahim,

Ketko,

Scheinowitz

et al. 2024

PLoS ONE

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The use of wearable sensors for real-time monitoring of exercise-related measures has been extensively studied in recent years (e.g., performance enhancement, optimizing athlete’s training, and preventing injuries). Surface electromyography (sEMG), which measures muscle activity, is a widely researched technology in exercise monitoring. However, due to their cumbersome nature, traditional sEMG electrodes are limited. In particular, facial EMG (fEMG) studies in physical training have been limited, with some scarce evidence suggesting that fEMG may be used to monitor exercise-related measurements. Altogether, sEMG recordings from facial muscles in the context of exercise have been examined relatively inadequately. In this feasibility study, we assessed the ability of a new wearable sEMG technology to measure facial muscle activity during exercise. Six young, healthy, and recreationally active participants (5 females), performed an incremental cycling exercise test until exhaustion, while facial sEMG and vastus lateralis (VL) EMG were measured. Facial sEMG signals from both natural expressions and voluntary smiles were successfully recorded. Stable recordings and high-resolution facial muscle activity mapping were achieved during different exercise intensities until exhaustion. Strong correlations were found between VL and multiple facial muscles’ activity during voluntary smiles during exercise, with statistically significant coefficients ranging from 0.80 to 0.95 (p<0.05). This study demonstrates the feasibility of monitoring facial muscle activity during exercise, with potential implications for sports medicine and exercise physiology, particularly in monitoring exercise intensity and fatigue.

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Section: Multi-array Semg Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facial electromyography during exercise using soft electrode array: A feasibility study

Ibrahim,

Ketko,

Scheinowitz

et al. 2024

PLoS ONE

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“…Stable recordings were achieved both in a hospital environment and in a home setting (Shustak et al, in press). Utilizing our wireless recording technology (Inzelberg et al, 2017, 2018b) with a printed EEG electrode array, enabled clear separation between open versus closed eyes (Figure 2A). Sleep monitoring during a six hr session showed clear differentiation of sleep stages (Figure 2B).…”

Section: Novel Applicationsmentioning

confidence: 99%

Electrophysiology Meets Printed Electronics: The Beginning of a Beautiful Friendship

Inzelberg

Hanein

2019

Front. Neurosci.

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Electroencephalography (EEG) and surface electromyography (sEMG) are notoriously cumbersome technologies. A typical setup may involve bulky electrodes, dangling wires, and a large amplifier unit. Adapting these technologies to numerous applications has been accordingly fairly limited. Thanks to the availability of printed electronics, it is now possible to effectively simplify these techniques. Elegant electrode arrays with unprecedented performances can be readily produced, eliminating the need to handle multiple electrodes and wires. Specifically, in this Perspective paper, we focus on the advantages of electrodes printed on soft films as manifested in signal transmission at the electrode-skin interface, electrode-skin stability, and user convenience during electrode placement while achieving prolonged use. Customizing electrode array designs and implementing blind source separation methods can also improve recording resolution, reduce variability between individuals and minimize signal cross-talk between nearby electrodes. Finally, we outline several important applications in the field of neuroscience and how each can benefit from the convergence of electrophysiology and printed electronics.

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A Wearable High-Resolution Facial Electromyography for Long Term Recordings in Freely Behaving Humans

Inzelberg

Rand

Steinberg

et al. 2018

Sci Rep

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Human facial expressions are a complex capacity, carrying important psychological and neurological information. Facial expressions typically involve the co-activation of several muscles; they vary between individuals, between voluntary versus spontaneous expressions, and depend strongly on personal interpretation. Accordingly, while high-resolution recording of muscle activation in a non-laboratory setting offers exciting opportunities, it remains a major challenge. This paper describes a wearable and non-invasive method for objective mapping of facial muscle activation and demonstrates its application in a natural setting. We focus on muscle activation associated with “enjoyment”, “social” and “masked” smiles; three categories with distinct social meanings. We use an innovative, dry, soft electrode array designed specifically for facial surface electromyography recording, a customized independent component analysis algorithm, and a short training procedure to achieve the desired mapping. First, identification of the orbicularis oculi and the levator labii superioris was demonstrated from voluntary expressions. Second, the zygomaticus major was identified from voluntary and spontaneous Duchenne and non-Duchenne smiles. Finally, using a wireless device in an unmodified work environment revealed expressions of diverse emotions in face-to-face interaction. Our high-resolution and crosstalk-free mapping, along with excellent user-convenience, opens new opportunities in gaming, virtual-reality, bio-feedback and objective psychological and neurological assessment.

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Wireless electronic-tattoo for long-term high fidelity facial muscle recordings

Cited by 3 publications

References 8 publications

Facial electromyography during exercise using soft electrode array: A feasibility study

Facial electromyography during exercise using soft electrode array: A feasibility study

Electrophysiology Meets Printed Electronics: The Beginning of a Beautiful Friendship

A Wearable High-Resolution Facial Electromyography for Long Term Recordings in Freely Behaving Humans

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