Data-driven analysis of facial thermal responses and multimodal physiological consistency among subjects

AbstractFacial infra-red imaging (IRI) is a contact-free technique complimenting the traditional psychophysiological measures to characterize physiological profile. However, its full potential in affective research is arguably unmet due to the analytical challenges it poses. Here we acquired facial IRI data, facial expressions and traditional physiological recordings (heart rate and skin conductance) from healthy human subjects whilst they viewed a 20-min-long unedited emotional movie. We present a novel application of motion correction and the results of spatial independent component analysis of the thermal data. Three distinct spatial components are recovered associated with the nose, the cheeks and respiration. We first benchmark this methodology against a traditional nose-tip region-of-interest based technique showing an expected similarity of signals extracted by these methods. We then show significant correlation of all the physiological responses across subjects, including the thermal signals, suggesting common dynamic shifts in emotional state induced by the movie. In sum, this study introduces an innovative approach to analyse facial IRI data and highlights the potential of thermal imaging to robustly capture emotion-related changes induced by ecological stimuli.

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Data-driven analysis of facial thermal responses to an emotional movie reveals consistent stimulus-locked physiological changes

10.1101/2020.09.02.276592 ◽

2020 ◽

Author(s):

Saurabh Sonkusare ◽

Michael Breakspear ◽

Tianji Pang ◽

Vinh Thai Nguyen ◽

Sascha Frydman ◽

...

Keyword(s):

Thermal Imaging ◽

Motion Correction ◽

Emotional State ◽

Human Subjects ◽

Region Of Interest ◽

Full Potential ◽

Healthy Human ◽

Physiological Profile ◽

Psychophysiological Measures ◽

Contact Free

AbstractFacial infra-red imaging (IRI) is a contact-free technique complimenting the traditional psychophysiological measures to characterize physiological profile. However, its full potential in affective research is arguably unmet due to the analytical challenges it poses. Here we acquired facial IRI data, facial expressions and traditional physiological recordings (heart rate and skin conductance) from healthy human subjects whilst they viewed a 20-minute-long unedited emotional movie. We present a novel application of motion correction and the results of spatial independent component analysis of the thermal data. Three distinct spatial components are recovered associated with the nose, the cheeks and a respiratory component. We first benchmark this methodology against a traditional region-of-interest based technique. We then show significant correlation of all the physiological responses across subjects, including the thermal signals, suggesting common dynamic shifts in emotional state induced by the movie. Finally, we show that thermal responses were significantly anti-correlated with the positive emotional content of the movie thus an index of emotionally-driven physiological response. In sum, this study introduces an innovative approach to analyse facial IRI data and highlights the potential of thermal imaging to robustly capture emotion-related changes in ecological contexts.

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Cooling Agents' Effect Monitoring When Applied to Skin of Healthy Human Subjects

Innovative Research in Thermal Imaging for Biology and Medicine - Advances in Medical Technologies and Clinical Practice ◽

10.4018/978-1-5225-2072-6.ch004 ◽

2017 ◽

pp. 79-92

Author(s):

Francis J Ring ◽

Carl Jones ◽

Kurt Ammer ◽

Peter Plassmann ◽

Ricardo Vardasca ◽

...

Keyword(s):

Thermal Imaging ◽

Sports Injuries ◽

Human Subjects ◽

Regions Of Interest ◽

Healthy Human ◽

Monitoring Method ◽

Camera Sensors ◽

Examination Room ◽

Objective Tool ◽

Over Time

There are cooling products available for relieving the pain of minor sports injuries, in muscles, tendons, joints, strains, sprains and knocks. These products are based on ice, gel and cold patches. In order to quantify objectively the effect of each type of those products thermal imaging was used. This monitoring method is suitable to quantify quickly large regions of interest in skin areas over time through the thermal radiation perceived by thermal camera sensors. All recorded images were taken in a controlled environment and following a standard capture protocol in terms of subject, equipment and examination room preparation and procedure of conduction the examination. Two experiments were performed. The obtained results demonstrate that quantitative thermal imaging is a simple and objective tool for evaluating topical cooling treatments. However, it is important to assess the emissivity of any applied substance, which could have a significant effect on temperature measurement by remote sensing.

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Improved Spatial Resolution of Electroencephalogram Using Tripolar Concentric Ring Electrode Sensors

Journal of Sensors ◽

10.1155/2020/6269394 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Xiang Liu ◽

Oleksandr Makeyev ◽

Walter Besio

Keyword(s):

Spatial Resolution ◽

Signal To Noise Ratio ◽

Human Subjects ◽

Region Of Interest ◽

Ring Electrode ◽

Brain Diseases ◽

Concentric Ring ◽

Healthy Human ◽

Good Spatial Resolution ◽

Visual Evoked

The electroencephalogram (EEG) is broadly used for research of brain activities and diagnosis of brain diseases and disorders. Although EEG provides good temporal resolution of millisecond or less, it does not provide good spatial resolution. There are two main reasons for the poor spatial resolution: the blurring effects of the head volume conductor and poor signal-to-noise ratio. We have developed a tripolar concentric ring electrode (TCRE) Laplacian sensor and now report on computer simulations comparing spatial resolution between conventional EEG disc electrode sensors and TCRE Laplacian sensors. We also performed visual evoked stimulus experiments and acquired visual evoked potentials (VEPs) from healthy human subjects. From the simulations, we found that TCRE Laplacian sensors can provide approximately a tenfold improvement in spatial resolution and pass signals from specific volumes. Placing TCRE sensors near the brain region of interest will allow passage of the wanted signals and rejection of distant interference signals. We were also able to detect VEPs on the scalp surface and show that TCREs separated VEP sources better than conventional disc electrodes.

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Monitoring of Cardiorespiratory Signals Using Thermal Imaging: A Pilot Study on Healthy Human Subjects

Sensors ◽

10.3390/s18051541 ◽

2018 ◽

Vol 18 (5) ◽

pp. 1541 ◽

Cited By ~ 10

Author(s):

Carina Barbosa Pereira ◽

Michael Czaplik ◽

Vladimir Blazek ◽

Steffen Leonhardt ◽

Daniel Teichmann

Keyword(s):

Pilot Study ◽

Thermal Imaging ◽

Human Subjects ◽

Healthy Human ◽

Healthy Human Subjects

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Estimation of breathing rate in thermal imaging videos: a pilot study on healthy human subjects

Journal of Clinical Monitoring and Computing ◽

10.1007/s10877-016-9949-y ◽

2016 ◽

Vol 31 (6) ◽

pp. 1241-1254 ◽

Cited By ~ 20

Author(s):

Carina Barbosa Pereira ◽

Xinchi Yu ◽

Michael Czaplik ◽

Vladimir Blazek ◽

Boudewijn Venema ◽

...

Keyword(s):

Pilot Study ◽

Thermal Imaging ◽

Human Subjects ◽

Breathing Rate ◽

Healthy Human ◽

Healthy Human Subjects

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Minimizing Carry-Over Effects After Treatment Failure and Maximizing Therapeutic Outcome

Zeitschrift für Psychologie ◽

10.1027/2151-2604/a000180 ◽

2014 ◽

Vol 222 (3) ◽

pp. 171-178 ◽

Cited By ~ 3

Author(s):

Mareile Hofmann ◽

Nathalie Wrobel ◽

Simon Kessner ◽

Ulrike Bingel

Keyword(s):

Treatment Failure ◽

Human Subjects ◽

Subsequent Treatment ◽

Clinical Samples ◽

Administration Route ◽

Healthy Human ◽

Negative Experiences ◽

Analgesic Treatment ◽

Balanced Design ◽

Carry Over

According to experimental and clinical evidence, the experiences of previous treatments are carried over to different therapeutic approaches and impair the outcome of subsequent treatments. In this behavioral pilot study we used a change in administration route to investigate whether the effect of prior treatment experience on a subsequent treatment depends on the similarity of both treatments. We experimentally induced positive or negative experiences with a topical analgesic treatment in two groups of healthy human subjects. Subsequently, we compared responses to a second, unrelated and systemic analgesic treatment between both the positive and negative group. We found that there was no difference in the analgesic response to the second treatment between the two groups. Our data indicate that a change in administration route might reduce the influence of treatment history and therefore be a way to reduce negative carry-over effects after treatment failure. Future studies will have to validate these findings in a fully balanced design including larger, clinical samples.

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Detection of Soluble Fibrin Monomer Complexes in Blood by Means of Protamine Sulphate Test

Thrombosis and Haemostasis ◽

10.1055/s-0038-1651247 ◽

1968 ◽

Vol 20 (01/02) ◽

pp. 044-049 ◽

Cited By ~ 33

Author(s):

B Lipiński ◽

K Worowski

Keyword(s):

Human Subjects ◽

Coronary Thrombosis ◽

Mean Value ◽

Healthy Human ◽

Protamine Sulphate ◽

Soluble Fibrin ◽

Fibrin Monomer ◽

Dog Plasma ◽

The Mean ◽

Precipitable Protein

SummaryIn the present paper described is a simple test for detecting soluble fibrin monomer complexes (SFMC) in blood. The test consists in mixing 1% protamine sulphate with diluted oxalated plasma or serum and reading the optical density at 6190 Å. In experiments with dog plasma, enriched with soluble fibrin complexes, it was shown that OD read in PS test is proportional to the amount of fibrin recovered from the precipitate. It was found that SFMC level in plasma increases in rabbits infused intravenously with thrombin and decreases after injection of plasmin with streptokinase. In both cases PS precipitable protein in serum is elevated indicating enhanced fibrinolysis. In healthy human subjects the mean value of OD readings in plasma and sera were found to be 0.30 and 0.11, while in patients with coronary thrombosis they are 0.64 and 0.05 respectively. The origin of SFMC in circulation under physiological and pathological conditions is discussed.

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