The Experts below are selected from a list of 3147 Experts worldwide ranked by ideXlab platform
Jennifer N Mahon - One of the best experts on this subject based on the ideXlab platform.
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Surface Facial Electromyography, skin conductance, and self-reported emotional responses to light- and season-relevant stimuli in seasonal affective disorder.
Journal of affective disorders, 2011Co-Authors: Kathryn T. Lindsey, Kelly J Rohan, Kathryn A Roecklein, Jennifer N MahonAbstract:Learned associations between depressive behavior and environmental stimuli signaling low light availability and winter season may play a role in seasonal affective disorder (SAD). The purpose of this study was to determine whether light and season environmental cues elicit emotional responses that are distinct in individuals with SAD. Twenty-four currently depressed SAD participants were compared to 24 demographically-matched controls with no depression history on emotional responses to outdoor scenes captured under two light intensity (i.e., clear, sunny vs. overcast sky) and three season (i.e., summer with green leaves, fall with autumn foliage, and winter with bare trees) conditions. Emotion measures included surface Facial Electromyography (EMG) activity in the corrugator supercilii and zygomaticus major muscle regions, skin conductance, and self-reported mood state on the Profile of Mood States Depression-Dejection Subscale. Light intensity was a more salient cue than season in determining emotional reactions among SAD participants. Relative to controls, SAD participants displayed more corrugator activity, more frequent significant skin conductance responses (SCR), greater SCR magnitude, and more self-reported depressed mood in response to overcast stimuli and less corrugator activity, lower SCR magnitude, and less self-reported depressed mood in response to sunny stimuli. Study limitations include the single, as opposed to repeated, assessment and the lack of a nonseasonal depression group. These findings suggest that extreme emotional reactivity to light-relevant stimuli may be a correlate of winter depression; and future work should examine its potential onset or maintenance significance. Copyright © 2011 Elsevier B.V. All rights reserved.
Kathryn T. Lindsey - One of the best experts on this subject based on the ideXlab platform.
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Surface Facial Electromyography, skin conductance, and self-reported emotional responses to light- and season-relevant stimuli in seasonal affective disorder.
Journal of affective disorders, 2011Co-Authors: Kathryn T. Lindsey, Kelly J Rohan, Kathryn A Roecklein, Jennifer N MahonAbstract:Learned associations between depressive behavior and environmental stimuli signaling low light availability and winter season may play a role in seasonal affective disorder (SAD). The purpose of this study was to determine whether light and season environmental cues elicit emotional responses that are distinct in individuals with SAD. Twenty-four currently depressed SAD participants were compared to 24 demographically-matched controls with no depression history on emotional responses to outdoor scenes captured under two light intensity (i.e., clear, sunny vs. overcast sky) and three season (i.e., summer with green leaves, fall with autumn foliage, and winter with bare trees) conditions. Emotion measures included surface Facial Electromyography (EMG) activity in the corrugator supercilii and zygomaticus major muscle regions, skin conductance, and self-reported mood state on the Profile of Mood States Depression-Dejection Subscale. Light intensity was a more salient cue than season in determining emotional reactions among SAD participants. Relative to controls, SAD participants displayed more corrugator activity, more frequent significant skin conductance responses (SCR), greater SCR magnitude, and more self-reported depressed mood in response to overcast stimuli and less corrugator activity, lower SCR magnitude, and less self-reported depressed mood in response to sunny stimuli. Study limitations include the single, as opposed to repeated, assessment and the lack of a nonseasonal depression group. These findings suggest that extreme emotional reactivity to light-relevant stimuli may be a correlate of winter depression; and future work should examine its potential onset or maintenance significance. Copyright © 2011 Elsevier B.V. All rights reserved.
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Surface Facial Electromyography Reactions to Light-Relevant and Season-Relevant Stimuli in Seasonal Affective Disorder
2005Co-Authors: Kathryn T. LindseyAbstract:Abstract : Facial Electromyography (EMG) activity was recorded from the zygomaticus major and corrugator supercilii muscle regions to examine emotion-specific reactivity in 24 currently depressed individuals meeting DSM-IV criteria for Major Depression, Recurrent with Seasonal Pattern, and no other current Axis I diagnosis, and 24 controls with normal mood and no history of depression. Based on models of seasonal affective disorder (SAD) and a proposed role for learned associations between depressive behavior and environmental stimuli signaling low light and winter season, participants were exposed to light- and season-relevant environmental stimuli and were asked to imagine what they would be feeling and thinking if they were actually in the picture. Skin conductance response (SCR) was also assessed to determine participants' general sympathetic arousal to the stimuli. Results show that SAD participants did the following: (1) responded to bright light stimuli with decreased corrugator mean EMG activity relative to low light stimuli; (2) demonstrated no increases in zygomatic mean EMG activity to bright light stimuli; (3) reported an exacerbation of baseline depressed mood following low light and winter stimuli and an improvement in depressed mood following bright light stimuli; and (4) evidenced increased SCR magnitude to bright light stimuli as compared to low light stimuli. Notably, corrugator and self-report mood ratings support previous findings of heightened psychophysiological reactivity and exacerbated depressed mood after exposure to light-relevant stimuli in SAD and suggest that light intensity may be more salient than seasonal cues in determining affective reactivity. Further research is needed to understand how these associations develop, and to establish the clinical implications for psychophysiological measures in SAD assessment and treatment monitoring.
Hatice Gunes - One of the best experts on this subject based on the ideXlab platform.
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ICMI - Facial Electromyography-based Adaptive Virtual Reality Gaming for Cognitive Training
Proceedings of the 2020 International Conference on Multimodal Interaction, 2020Co-Authors: Lorcan Reidy, Dennis Chan, Charles Nduka, Hatice GunesAbstract:Cognitive training has shown promising results for delivering improvements in human cognition related to attention, problem solving, reading comprehension and information retrieval. However, two frequently cited problems in cognitive training literature are a lack of user engagement with the training programme, and a failure of developed skills to generalise to daily life. This paper introduces a new cognitive training (CT) paradigm designed to address these two limitations by combining the benefits of gamification, virtual reality (VR), and affective adaptation in the development of an engaging, ecologically valid, CT task. Additionally, it incorporates Facial Electromyography (EMG) as a means of determining user affect while engaged in the CT task. This information is then utilised to dynamically adjust the game's difficulty in real-time as users play, with the aim of leading them into a state of flow. Affect recognition rates of 64.1% and 76.2%, for valence and arousal respectively, were achieved by classifying a DWT-Haar approximation of the input signal using kNN. The affect-aware VR cognitive training intervention was then evaluated with a control group of older adults. The results obtained substantiate the notion that adaptation techniques can lead to greater feelings of competence and a more appropriate challenge of the user's skills.
Uta Sailer - One of the best experts on this subject based on the ideXlab platform.
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Using Facial Electromyography to Assess Facial Muscle Reactions to Experienced and Observed Affective Touch in Humans
Journal of visualized experiments : JoVE, 2019Co-Authors: Anbjørn Ree, Uta Sailer, India Morrison, Håkan Olausson, Markus Heilig, Leah M. MayoAbstract:"Affective" touch is believed to be processed in a manner distinct from discriminatory touch and to involve activation of C-tactile (CT) afferent fibers. Touch that optimally activates CT fibers is consistently rated as hedonically pleasant. Patient groups with impaired social-emotional functioning also show disordered affective touch ratings. However, relying on self-reported ratings of touch has many limitations, including recall bias and communication barriers. Here, we describe a methodological approach to study affective responses to touch via Facial Electromyography (EMG) that circumvents the reliance on self-report ratings. Facial EMG is an objective, quantitative, and non-invasive method to measure Facial muscle activity indicative of affective responses. Responses can be assessed across healthy and patient populations without the need for verbal communication. Here, we provide two separate datasets demonstrating that CT-optimal and non-optimal touch elicit distinct Facial muscle reactions. Moreover, Facial EMG responses are consistent across stimulus modalities, e.g. tactile (experienced touch) and visual (observed touch). Finally, the temporal resolution of Facial EMG can detect responses on timescales that supersede that of verbal reporting. Together, our data suggest that Facial EMG is a suitable methodology for use in affective tactile research that can be used to supplement, or in some cases, supplant, existing measures.
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Touch targeting C-tactile afferent fibers has a unique physiological pattern: A combined electrodermal and Facial Electromyography study.
Biological psychology, 2018Co-Authors: Anbjørn Ree, Leah M. Mayo, Siri Leknes, Uta SailerAbstract:Abstract Caress-like touch is thought to rely on C-tactile (CT) fiber signaling. Here, the arousing and emotional effects of CT-optimal touch were assessed via participants’ skin conductance level (SCL), Facial Electromyography (EMG) responses and subjective ratings of pleasantness and intensity. Temporal Facial EMG analysis was based on the conduction velocity of CT-fibers. 45 healthy participants received CT-optimal touch, control touch and visual control input during 2-minute trials. CT optimal touch was significantly more pleasant and intense than control touch. In the initial 700 ms of stimulation there was no difference in Facial EMG responses to touch. Between 700 and 6300 ms there was a significant reduction of corrugator activity in response to CT optimal touch only, possibly reflecting the affective value of CT optimal touch. Based on the temporal dynamics of the reduced corrugator activity, we suggest that CT fibers are involved in mediating a reduction in corrugator activity.
Glenna L. Read - One of the best experts on this subject based on the ideXlab platform.
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Examining desensitization using Facial Electromyography
Computers in Human Behavior, 2016Co-Authors: Glenna L. Read, Mary E. Ballard, Lisa Emery, Doris G. BazziniAbstract:The results of research investigating the effects of violent videogames have been inconsistent. Some evidence suggests that exposure to violent videogames decreases physiological arousal and results in desensitization to subsequent exposure to violent stimuli. Other research does not support these findings. This study examined physiological and affective desensitization to violent videogame play. Participants played a violent or non-violent videogame and then viewed aggressive, pleasant, and neutral images. Participants' negative affect in response to the images was assessed by examining activity in the brow muscle region (i.e., corrugator supercilii), heart rate (HR), self-reported affect, and self-reported arousal. Based on previous research regarding the General Aggression Model (GAM), we expected that participants who played the violent videogame would demonstrate desensitization as evidenced by less reactivity in the corrugator supercilii region and less HR reactivity in response to violent images than participants who played the nonviolent videogame. We also expected that participants who played the violent videogame would rate the aggressive images as less aversive than those who played the nonviolent game. Contrary to our expectations, the findings were not consistent with the hypotheses based on the GAM. Examined physiological and affective desensitization to one violent videogame.Participants played a (non)violent videogame then looked at aggressive images.Examined physiological and affective desensitization to one violent video game.Participants did not differ in self-reported affect or arousal.The violent, compared to the nonviolent, videogame did not produce desensitization.
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Detection of Physiological and Affective Desensitization to Violent Video Games Using Facial Electromyography
2013Co-Authors: Glenna L. ReadAbstract:Some evidence, using the framework of the General Aggression Model (GAM), suggests that exposure to violent video games decreases physiological arousal and blunts affective responses (i.e., produces desensitization) to subsequent exposure to violent or negative stimuli (Bartholow, Bushman, & Sestir, 2006; Carnagey, Anderson, & Bushman, 2007b). The current experimental study examined physiological and affective desensitization to violent video game play through the GAM. Participants played a violent or non-violent game. Afterwards, they were exposed to pleasant, neutral, and aggressive images. Facial EMG was used to assess participants’ reactions by measuring intensity of negative affect indicated by movements of the brow muscle region (i.e., corrugator supercilii; CS). Heart rate (HR) and self-reported affective valence were also gathered. It was hypothesized that participants who played the violent game would demonstrate less negative affect as measured by reactivity in the CS region and less HR reactivity to violent images than participants who played the nonviolent game. It was also expected that participants who played the violent game would differ from those who played the nonviolent game in their ratings of aggressive images. None of the hypotheses were supported. Results indicated the violent video game did not produce physiological and affective desensitization.
