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1.
Sensors (Basel) ; 21(7)2021 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-33808147

RESUMO

Mental stress can lead to traffic accidents by reducing a driver's concentration or increasing fatigue while driving. In recent years, demand for methods to detect drivers' stress in advance to prevent dangerous situations increased. Thus, we propose a novel method for detecting driving stress using nonlinear representations of short-term (30 s or less) physiological signals for multimodal convolutional neural networks (CNNs). Specifically, from hand/foot galvanic skin response (HGSR, FGSR) and heart rate (HR) short-term input signals, first, we generate corresponding two-dimensional nonlinear representations called continuous recurrence plots (Cont-RPs). Second, from the Cont-RPs, we use multimodal CNNs to automatically extract FGSR, HGSR, and HR signal representative features that can effectively differentiate between stressed and relaxed states. Lastly, we concatenate the three extracted features into one integrated representation vector, which we feed to a fully connected layer to perform classification. For the evaluation, we use a public stress dataset collected from actual driving environments. Experimental results show that the proposed method demonstrates superior performance for 30-s signals, with an overall accuracy of 95.67%, an approximately 2.5-3% improvement compared with that of previous works. Additionally, for 10-s signals, the proposed method achieves 92.33% classification accuracy, which is similar to or better than the performance of other methods using long-term signals (over 100 s).


Assuntos
Condução de Veículo , Redes Neurais de Computação , Acidentes de Trânsito , Resposta Galvânica da Pele , Frequência Cardíaca
2.
Neurophysiol Clin ; 51(2): 193-196, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33551341

RESUMO

Dysautonomia has been reported in COVID-19. Sweat function testing has been proposed to assess autonomic neuropathy. Fifty Indian patients consulting for neurological symptoms participated in this observational study. The NHS questionnaire for neurological symptoms was completed and electrochemical skin conductance was measured using Sudoscan. The 26% of patients with sweat dysfunction i) were older (p = 0.001), ii) were more frequently treated at home (p = 0.008), iii) were more likely to have received antiviral treatment (p = 0.0006), and iv) more frequently reported at least one motor, sensory or autonomic symptom (p = 0.04). This preliminary study suggests that patients with COVID-19 should be screened for dysautonomia.


Assuntos
Doenças do Sistema Nervoso Autônomo/etiologia , Sudorese , Adulto , Idoso , Envelhecimento , Antivirais/efeitos adversos , Antivirais/uso terapêutico , Feminino , Resposta Galvânica da Pele , Humanos , Índia , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Adulto Jovem
3.
J Vis Exp ; (167)2021 01 18.
Artigo em Inglês | MEDLINE | ID: mdl-33522512

RESUMO

Transcranial direct current stimulation (tDCS) is a form of non-invasive brain stimulation that changes the likelihood of neuronal firing through modulation of neural resting membranes. Compared to other techniques, tDCS is relatively safe, cost-effective, and can be administered while individuals are engaged in controlled, specific cognitive processes. This latter point is important as tDCS may predominantly affect intrinsically active neural regions. In an effort to test tDCS as a potential treatment for psychiatric illness, the protocol described here outlines a novel procedure that allows the simultaneous application of tDCS during exposure to trauma-related cues using virtual reality (tDCS+VR) for veterans with posttraumatic stress disorder (NCT03372460). In this double-blind protocol, participants are assigned to either receive 2 mA tDCS, or sham stimulation, for 25 minutes while passively watching three 8-minute standardized virtual reality drives through Iraq or Afghanistan, with virtual reality events increasing in intensity during each drive. Participants undergo six sessions of tDCS+VR over the course of 2-3 weeks, and psychophysiology (skin conductance reactivity) is measured throughout each session. This allows testing for within and between session changes in hyperarousal to virtual reality events and adjunctive effects of tDCS. Stimulation is delivered through a built-in rechargeable battery-driven tDCS device using a 1 (anode) x 1 (cathode) unilateral electrode set-up. Each electrode is placed in a 3 x 3 cm (current density 2.22 A/m2) reusable sponge pocket saturated with 0.9% normal saline. Sponges with electrodes are attached to the participant's skull using a rubber headband with the electrodes placed such that they target regions within the ventromedial prefrontal cortex. The virtual reality headset is placed over the tDCS montage in such a way as to avoid electrode interference.


Assuntos
Estimulação Transcraniana por Corrente Contínua , Realidade Virtual , Adolescente , Adulto , Idoso , Método Duplo-Cego , Eletrodos , Feminino , Resposta Galvânica da Pele , Humanos , Masculino , Pessoa de Meia-Idade , Córtex Pré-Frontal/fisiologia , Transtornos de Estresse Pós-Traumáticos/terapia , Estimulação Transcraniana por Corrente Contínua/psicologia
4.
PLoS One ; 16(1): e0242830, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33411746

RESUMO

Although investigation of the brains of criminals began quite early in the history of psychophysiological research, little is known about brain plasticity of offenders with psychopathy. Building on our preliminary study reporting successful brain self-regulation using slow cortical potential (SCP) neurofeedback in offenders with psychopathy, we investigated the central nervous and autonomic peripheral changes occurring after brain self-regulation in a group of severe male offenders with psychopathy. Regarding the central nervous system, an overall suppression of the psychopathic overrepresentation of slow frequency bands was found, such as delta and theta band activity, after EEG neurofeedback. In addition, an increase in alpha band activity could be observed after the SCP self-regulation training. Electrodermal activity adaptively changed according to the regulation task, and this flexibility improved over training time. The results of this study point towards a constructive learning process and plasticity in neural and peripheral measures of offenders with psychopathy.


Assuntos
Transtorno da Personalidade Antissocial/diagnóstico por imagem , Transtorno da Personalidade Antissocial/psicologia , Encéfalo/diagnóstico por imagem , Criminosos/psicologia , Eletroencefalografia , Resposta Galvânica da Pele , Autocontrole , Potenciais de Ação , Adulto , Ritmo alfa/fisiologia , Análise de Variância , Transtorno da Personalidade Antissocial/fisiopatologia , Encéfalo/fisiopatologia , Humanos , Masculino , Neurorretroalimentação , Projetos Piloto , Descanso , Análise e Desempenho de Tarefas
5.
Sensors (Basel) ; 21(3)2021 Jan 24.
Artigo em Inglês | MEDLINE | ID: mdl-33498830

RESUMO

Wearable sensors are nowadays largely employed to assess physiological signals derived from the human body without representing a burden in terms of obtrusiveness. One of the most intriguing fields of application for such systems include the assessment of physiological responses to sensory stimuli. In this specific regard, it is not yet known which are the main psychophysiological drivers of olfactory-related pleasantness, as the current literature has demonstrated the relationship between odor familiarity and odor valence, but has not clarified the consequentiality between the two domains. Here, we enrolled a group of university students to whom olfactory training lasting 3 months was administered. Thanks to the analysis of electrocardiogram (ECG) and galvanic skin response (GSR) signals at the beginning and at the end of the training period, we observed different autonomic responses, with higher parasympathetically-mediated response at the end of the period with respect to the first evaluation. This possibly suggests that an increased familiarity to the proposed stimuli would lead to a higher tendency towards relaxation. Such results could suggest potential applications to other domains, including personalized treatments based on odors and foods in neuropsychiatric and eating disorders.


Assuntos
Olfato , Dispositivos Eletrônicos Vestíveis , Sistema Nervoso Autônomo , Resposta Galvânica da Pele , Humanos , Odorantes
6.
PLoS One ; 16(1): e0244929, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33481838

RESUMO

A novel conversation-analytically informed paradigm was used to examine how joint decision-making interaction, with its various types of proposal sequences, is reflected in the physiological responses of participants. Two types of dyads-dyads with one depressed and one non-depressed participant (N = 15) and dyads with two non-depressed participants (N = 15)-engaged in a series of conversational joint decision-making tasks, during which we measured their skin conductance (SC) responses. We found that the participants' SC response rates were higher and more synchronized during proposal sequences than elsewhere in the conversation. Furthermore, SC response rates were higher when the participant was in the role of a proposal speaker (vs. a proposal recipient), and making a proposal was associated with higher SC response rates for participants with depression (vs. participants without depression). Moreover, the SC response rates in the proposal speaker were higher when the recipient accepted (vs. not accepted) the proposal. We interpret this finding with reference to accepting responses suggesting a commitment to future action, for which the proposal speaker may feel specifically responsible for. A better understanding of the physiological underpinnings of joint decision-making interaction may help improve democratic practices in contexts where certain individuals experience challenges in this regard.


Assuntos
Tomada de Decisões/fisiologia , Adulto , Depressão/fisiopatologia , Depressão/psicologia , Feminino , Resposta Galvânica da Pele , Humanos , Masculino
7.
Sensors (Basel) ; 21(2)2021 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-33430220

RESUMO

Sleep is an essential element to human life, restoring the brain and body from accumulated fatigue from daily activities. Quantitative monitoring of daily sleep quality can provide critical feedback to evaluate human health and life patterns. However, the existing sleep assessment system using polysomnography is not available for a home sleep evaluation, while it requires multiple sensors, tabletop electronics, and sleep specialists. More importantly, the mandatory sleep in a designated lab facility disrupts a subject's regular sleep pattern, which does not capture one's everyday sleep behaviors. Recent studies report that galvanic skin response (GSR) measured on the skin can be one indicator to evaluate the sleep quality daily at home. However, the available GSR detection devices require rigid sensors wrapped on fingers along with separate electronic components for data acquisition, which can interrupt the normal sleep conditions. Here, we report a new class of materials, sensors, electronics, and packaging technologies to develop a wireless, soft electronic system that can measure GSR on the wrist. The single device platform that avoids wires, rigid sensors, and straps offers the maximum comfort to wear on the skin and minimize disruption of a subject's sleep. A nanomaterial GSR sensor, printed on a soft elastomeric membrane, can have intimate contact with the skin to reduce motion artifact during sleep. A multi-layered flexible circuit mounted on top of the sensor provides a wireless, continuous, real-time recording of GSR to classify sleep stages, validated by the direct comparison with the standard method that measures other physiological signals. Collectively, the soft bioelectronic system shows great potential to be working as a portable, at-home sensor system for assessing sleep quality before a hospital visit.


Assuntos
Dispositivos Eletrônicos Vestíveis , Eletrônica , Resposta Galvânica da Pele , Humanos , Polissonografia , Fases do Sono
8.
Nonlinear Dynamics Psychol Life Sci ; 25(1): 19-39, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33308388

RESUMO

Synchronization is a special case of self-organization in which one can observe close mimicry in behavior of the system components. Synchrony in body movements, autonomic arousal, and EEG activity among human individuals has attracted considerable attention for their possible roles in social interaction. This article is specifically concerned with autonomic synchrony and finding the best model for the dyadic relationships, with regard to both theoretical and empirical accuracy, that could be extrapolated to synchrony levels for groups and teams of three or more people. The four models that are compared in this study have different theoretical origins: the two-variable linear regression function, a three-parameter nonlinear regression function, the logistic map function stated in polynomial form, and the logistic map function stated as an exponential regression structure. The data for this study were electrodermal responses collected from a team of four people engaged in an emergency response simulation that produced 12 dyadic time series. Results shows strong levels of fit between the data and all four models, although there were significant differences among them. Further research directions point toward finding conditions that favor one model over another and exploring other possible nonlinear structures.


Assuntos
Nível de Alerta , Resposta Galvânica da Pele , Relações Interpessoais , Modelos Psicológicos , Atenção , Sistema Nervoso Autônomo , Eletroencefalografia , Emergências/psicologia , Humanos , Modelos Lineares , Dinâmica não Linear
9.
Acta Psychol (Amst) ; 212: 103215, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33316458

RESUMO

We explore dance video clip stimuli as a means to test human observers' accuracy in detecting genuine emotional expressivity in full-body movements. Stimuli of every-day-type full-body expressions of emotions usually use culturally very recognizable actions (e.g. fist shaking for anger, etc). However, expressive dance movement stimuli can be created to contain fully abstract movements. The expressivity results from subtle variations in the body movements of the expressor, and emotions cannot be recognised by observers via particular actions (e.g. fist shaking, etc). Forty-one participants watched and rated 24 pairs of short dance videos -from a published normalised dance stimuli library- in randomised order (N = 48). Of each carefully matched pair, one version of the full-body movement sequence had been danced to be emotionally genuinely expressive (clip a), while the other version of the same sequence (clip b) had been danced -while technically correct- without any emotional expressivity. Participants rated (i) expressivity (to test their accuracy; block 1), and (ii) how much they liked each movement (an implicit measure to test their emotional response ("liking"); block 2). Participants rated clips that were intended to be expressive as more expressive (part 1: expressivity ratings), and liked those expressive clips more than the non-expressive clips (part 2: liking ratings). Besides, their galvanic skin response differed, depending on the category of clips they were watching (expressive vs. non-expressive), and this relationship was modulated by interceptive accuracy and arts experience. Results are discussed in relation to the Body Precision Hypothesis and the Hypothesis of Constructed Emotion.


Assuntos
Dança , Emoções , Movimento , Resposta Galvânica da Pele , Humanos , Psicofisiologia , Distribuição Aleatória
10.
PLoS One ; 15(12): e0244427, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33382784

RESUMO

Although emotion regulation has been proposed to be crucial for empathy, investigations on emotion regulation have been primarily limited to intrapersonal processes, leaving the interpersonal processes of self-regulation rather unexplored. Moreover, studies showed that emotion regulation and empathy are related with increased autonomic activation. How emotion regulation and empathy are related at the autonomic level, and more specifically during differently valenced social situations remains an open question. Healthy adults viewed a series of short videos illustrating a target who was expressing positive, negative, or no emotions during a social situation (Positive, Negative, or Neutral Social Scenes). Prior to each video, participants were instructed to reappraise their own emotions (Up-regulation, Down-regulation, or No-regulation). To assess autonomic activation, RR intervals (RRI), high frequency (HF) components of heart rate variability (HRV), and electrodermal activity phasic responses (EDRs) were calculated. Situational empathy was measured through a visual analogue scale. Participants rated how empathic they felt for a specific target. Up- and Down-regulation were related to an increase and a decrease in situational empathy and an increase in RRI and HF, respectively, compared to the control condition (No-regulation). This suggests increased activity of the parasympathetic branch during emotion regulation of situational empathic responses. Positive compared to Negative Social Scenes were associated with decreased situational empathy, in addition to a slightly but non-significantly increased HF. Altogether, this study demonstrates that emotion regulation may be associated with changes in situational empathy and autonomic responses, preferentially dominated by the parasympathetic branch and possibly reflecting an increase of regulatory processes. Furthermore, the current study provides evidence that empathy for different emotional valences is associated with distinct changes in situational empathy and autonomic responses.


Assuntos
Sistema Nervoso Autônomo/fisiologia , Regulação Emocional/fisiologia , Resposta Galvânica da Pele/fisiologia , Adulto , Empatia , Feminino , Frequência Cardíaca , Humanos , Masculino , Autorrelato , Adulto Jovem
11.
Artigo em Inglês | MEDLINE | ID: mdl-33017938

RESUMO

Online gambling has dramatically increased over the last decades, thus the study of the underlying physiological mechanisms could be helpful to better understand related disorders. Specifically, physiological arousal is well-known to play a key role in gambling behavior. In the present study, unconventional frequency feature of the electrodermal activity (EDA) was extracted (EDASympn) and compared to the most common heart rate variability (HRV) spectral parameters (LF, HF, HFn, LF/HF) to measure arousal during an online gambling session. 46 subjects played online slot machines for 30 minutes, while EDA and ECG were recorded. In the analysis the gaming session was divided into three 10-minutes-long phases. A one-way repeated measures analysis of variance was carried out for each spectral parameter, with the game phases as within-subjects factor. All the calculated parameters showed significant differences between the initial phase of the game and the last two (p < 0.001). In particular, EDAsympn displayed a reciprocal trend with respect to HFn: an initial increase (decrease for HFn) was followed by a plateau phase. LF exhibited a significant difference also between the second and the third phases. EDA frequency-domain analysis appears to be a promising method for physiological arousal assessment, by showing the same discriminative power of HRV spectral components. Further research is needed to emphasize these findings.Clinical Relevance-This promotes the use of a new and easy-to-implement method to assess sympathetic activity.


Assuntos
Resposta Galvânica da Pele , Jogo de Azar , Algoritmos , Nível de Alerta , Frequência Cardíaca , Humanos
12.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 867-870, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018122

RESUMO

Stress can affect a person's performance and health positively and negatively. A lot of the relaxation methods have been suggested to reduce the amount of stress. This study used virtual reality (VR) video games to alleviate stress. Physiological signals captured from Electrocardiogram (ECG), galvanic skin response (GSR), and respiration (RESP) were used to determine if the subject was stressed or relaxed. Time and frequency domain features were then extracted to evaluate stress levels. Frequency domain methods such as low-frequency (LF), high-frequency (HF), LF-HF ratio (LF/HF) are considered the most effective for HRV analysis, Poincare plots are moré discerning visually and shares a 81% correlation with LF/HF ratio. GSR is associated with EDA activity, which only increases due to stress. Stress and relax were classified using Linear Discriminant Analysis (LDA), Decision Tree, Support Vector machine (SVM), Gradient Boost (GB), and Naive Bayes. GB performed the best with an accuracy of 85% after 5 fold cross validation with 100 iterations, which is admirable from a small dataset with 50 samples.


Assuntos
Jogos de Vídeo , Realidade Virtual , Teorema de Bayes , Eletrocardiografia , Resposta Galvânica da Pele , Humanos
13.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 1799-1802, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018348

RESUMO

This paper presents a proof-of-concept for contactless and nonintrusive estimation of electrodermal activity (EDA) correlates using a camera. RGB video of the palm under three different lighting conditions showed that for a suitably chosen illumination strategy the data from the camera is sufficient to estimate EDA correlates which agree with the measurements done using laboratory grade physiological sensors. The effects we see in the recorded video can be attributed to sweat gland activity, which inturn is known to be correlated with EDA. These effects are so pronounced that simple pixel statistics can be used to quantify them. Such a method benefits from advances in computer vision and graphics research and has the potential to be used in affective computing and psychophysiology research where contact based sensors may not be suitable.


Assuntos
Resposta Galvânica da Pele , Psicofisiologia , Mãos , Glândulas Sudoríparas
14.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 4526-4529, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33019000

RESUMO

We developed an objective real-time pain detection method using a smartphone and a wrist-worn wearable device to collect electrodermal activity (EDA) signals. Recently, various researchers have developed pain management applications. However, they rely on subjective self-reported pain scores or the video camera of a smartphone to detect pain, but the latter method's accuracy needs further improvement. In our work, we use a wrist-worn EDA device which transmits data via Bluetooth to a smartphone. A smartphone application was developed to analyze the EDA data so that near real-time processed pain detection information can be displayed. The analysis of EDA is based on estimating time-varying spectral power in the frequency range (0.08-0.24 Hz) associated with the sympathetic nervous system. This time-varying characterization of EDA is termed TVSymp. In this work, we also examined whether removing baseline EDA fluctuations from TVSymp would provide more accurate results. This was carried out by taking the moving average of the EDA response prior to stimulus and subtracting that value from the EDA response post stimulus. This approach is termed modified TVSymp (MTVSymp). Pain stimuli were induced in ten subjects using a thermal grill, which gives intense pain perception without damaging skin tissues. We compared both TVSymp and MTVSymp in detecting pain induced by the thermal grill using machine learning approaches. We found the accuracy of pain detection of TVSymp and MTVSymp to be 80% and 90%, respectively.


Assuntos
Smartphone , Resposta Galvânica da Pele , Humanos , Dor/diagnóstico , Manejo da Dor , Percepção da Dor
15.
Neuron ; 108(1): 8-12, 2020 10 14.
Artigo em Inglês | MEDLINE | ID: mdl-33058768

RESUMO

Faster, more reliable, and comfortably wearable personal devices are producing data from biosensors on an unprecedented scale. Combined with context and analytics, these signals hold great promise to advance neuroscience via real-world data. Here, we discuss wearable technology broadly and provide specific examples of activity patterns from electrodermal sensors found during sleep, stress, and seizures.


Assuntos
Resposta Galvânica da Pele/fisiologia , Neurociências , Convulsões/fisiopatologia , Sono/fisiologia , Estresse Psicológico/fisiopatologia , Dispositivos Eletrônicos Vestíveis , Biorretroalimentação Psicológica/métodos , Lateralidade Funcional , Humanos , Convulsões/terapia
16.
PLoS One ; 15(8): e0237641, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32841260

RESUMO

It is now widely accepted that the perception of emotional expression in music can be vastly different from the feelings evoked by it. However, less understood is how the locus of emotion affects the experience of music, that is how the act of perceiving the emotion in music compares with the act of assessing the emotion induced in the listener by the music. In the current study, we compared these two emotion loci based on the psychophysiological response of 40 participants listening to 32 musical excerpts taken from movie soundtracks. Facial electromyography, skin conductance, respiration and heart rate were continuously measured while participants were required to assess either the emotion expressed by, or the emotion they felt in response to the music. Using linear mixed effects models, we found a higher mean response in psychophysiological measures for the "perceived" than the "felt" task. This result suggested that the focus on one's self distracts from the music, leading to weaker bodily reactions during the "felt" task. In contrast, paying attention to the expression of the music and consequently to changes in timbre, loudness and harmonic progression enhances bodily reactions. This study has methodological implications for emotion induction research using psychophysiology and the conceptualization of emotion loci. Firstly, different tasks can elicit different psychophysiological responses to the same stimulus and secondly, both tasks elicit bodily responses to music. The latter finding questions the possibility of a listener taking on a purely cognitive mode when evaluating emotion expression.


Assuntos
Atenção , Percepção Auditiva/fisiologia , Emoções/fisiologia , Músculos Faciais/fisiologia , Resposta Galvânica da Pele , Música/psicologia , Psicofisiologia , Respiração , Adulto , Feminino , Frequência Cardíaca , Humanos , Masculino
17.
PLoS One ; 15(8): e0236999, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32813734

RESUMO

Snakes have been important ambush predators of both primates and human hunter-gatherers throughout their co-evolutionary history. Viperid snakes in particular are responsible for most fatal venomous snakebites worldwide and thus represent a strong selective pressure. They elicit intense fear in humans and are easily recognizable thanks to their distinctive morphotype. In this study, we measured skin resistance (SR) and heart rate (HR) in human subjects exposed to snake pictures eliciting either high fear (10 venomous viperid species) or disgust (10 nonvenomous fossorial species). Venomous snakes subjectively evaluated as frightening trigger a stronger physiological response (higher SR amplitude) than repulsive non-venomous snakes. However, stimuli presented in a block (more intense stimulation) do not trigger a stronger emotional response compared to sequentially presented stimuli (less intense stimulation). There are significant interindividual differences as subjects with high fear of snakes confronted with images of viperid snakes show stronger, longer-lasting, and more frequent changes in SR and higher HR compared to low-fear subjects. Thus, we show that humans demonstrate a remarkable ability to discriminate between dangerous viperids and harmless fossorial snakes, which is also reflected in distinct autonomous body responses.


Assuntos
Medo/fisiologia , Medo/psicologia , Mordeduras de Serpentes/psicologia , Serpentes , Adolescente , Adulto , Animais , Sistema Nervoso Autônomo/fisiologia , Evolução Biológica , Asco , Feminino , Resposta Galvânica da Pele/fisiologia , Frequência Cardíaca/fisiologia , Humanos , Masculino , Modelos Psicológicos , Estimulação Luminosa , Psicometria , Psicofisiologia , Venenos de Serpentes/envenenamento , Adulto Jovem
18.
Zhongguo Yi Liao Qi Xie Za Zhi ; 44(4): 283-287, 2020 Apr 08.
Artigo em Chinês | MEDLINE | ID: mdl-32762198

RESUMO

Emotion is a series of reactions triggered by a specific object or situation that affects a person's physiological state and can, therefore, be identified by physiological signals. This paper proposes an emotion recognition model. Extracted the features of physiological signals such as photoplethysmography, galvanic skin response, respiration amplitude, and skin temperature. The SVM-RFE-CBR(Recursive Feature Elimination-Correlation Bias Reduction-Support Vector Machine) algorithm was performed to select features and support vector machines for classification. Finally, the model was implemented on the DEAP dataset for an emotion recognition experiment. In the rating scale of valence, arousal, and dominance, the accuracy rates of 73.5%, 81.3%, and 76.1% were obtained respectively. The result shows that emotional recognition can be effectively performed by combining a variety of physiological signals.


Assuntos
Emoções , Nível de Alerta , Resposta Galvânica da Pele , Humanos , Fotopletismografia , Máquina de Vetores de Suporte
19.
Leg Med (Tokyo) ; 47: 101768, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32738701

RESUMO

We investigated the application of energy-dispersive X-ray fluorescent spectrometry (EDX) analysis to the detection of aluminum (Al), tin (Sn) and zinc (Zn) as the electric conductor in experimental electrical injury. Experimental electrical injury was caused by exposure to alternating current at 100 V for 10 s. The peaks of Al, Sn, and Zn were detected by EDX in formalin-fixed skin samples of each current exposure group. Histological examination revealed blister formation in all samples of each current exposure group. EDX analysis technique can be applied to detect Al, Sn, and Zn as the electric conductor, and is useful in the diagnosis of electrocution.


Assuntos
Alumínio/análise , Traumatismos por Eletricidade/diagnóstico , Traumatismos por Eletricidade/metabolismo , Eletricidade/efeitos adversos , Resposta Galvânica da Pele , Pele/metabolismo , Espectrometria por Raios X , Estanho/análise , Zinco/análise , Animais , Traumatismos por Eletricidade/patologia , Masculino , Ratos Wistar , Pele/patologia
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