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Liuzza MT, Zakrzewska MZ, Olofsson JK. Italian validation of the body odor disgust scale. Front Behav Neurosci 2024; 18:1389905. [PMID: 38974836 PMCID: PMC11224146 DOI: 10.3389/fnbeh.2024.1389905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 06/03/2024] [Indexed: 07/09/2024] Open
Abstract
Introduction Disgust sensitivity to body odors plays a role in a set of psychological mechanisms supposedly evolved to avoid pathogens. To assess individual differences in body odor disgust, we previously developed the body odor disgust scale (BODS) and validated it in English. The BODS presents six scenarios where disgust could be evoked by smells coming from an internal source and an external source. The present study aimed to validate the BODS in the Italian population and to find further evidence for its structural, construct, and criterion validity. Methods We used two large samples (N = 1,050, F = 527; and N = 402, F = 203, respectively) that were representative of the Italian population for sex and age. Results Across these two studies, we confirmed the hypothesized bifactor structure, with all the items loading onto a general body odor disgust sensitivity factor, and on two specific factors related to the internal structure. In terms of construct validity, we found that the BODS converged with pathogen disgust sensitivity of the three-domain disgust scale (TDDS) but was distinct from a general propensity to experience negative emotions. The BODS showed criterion validity in predicting the behavioral intentions toward COVID-19 avoidance behavior, although it did not seem to be incrementally valid when compared to the TDDS pathogen subscale. We also established scalar measurement invariance of the BODS regarding gender and found that women display higher levels of BODS. Discussion Results from the Italian version of the BODS indicate its structural, construct, nomological and criterion validity. Furthermore, our result on sex differences in disgust sensitivity are consistent with previous literature, and we discuss them in the broader context of cross-cultural and primate findings that points toward a possible evolutionary explanation of this difference.
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Affiliation(s)
- Marco Tullio Liuzza
- Department of Medical and Surgical Sciences, “Magna Graecia” University of Catanzaro, Catanzaro, Italy
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2
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Loos HM, Schaal B, Pause BM, Smeets MAM, Ferdenzi C, Roberts SC, de Groot J, Lübke KT, Croy I, Freiherr J, Bensafi M, Hummel T, Havlíček J. Past, Present, and Future of Human Chemical Communication Research. PERSPECTIVES ON PSYCHOLOGICAL SCIENCE 2023:17456916231188147. [PMID: 37669015 DOI: 10.1177/17456916231188147] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Although chemical signaling is an essential mode of communication in most vertebrates, it has long been viewed as having negligible effects in humans. However, a growing body of evidence shows that the sense of smell affects human behavior in social contexts ranging from affiliation and parenting to disease avoidance and social threat. This article aims to (a) introduce research on human chemical communication in the historical context of the behavioral sciences; (b) provide a balanced overview of recent advances that describe individual differences in the emission of semiochemicals and the neural mechanisms underpinning their perception, that together demonstrate communicative function; and (c) propose directions for future research toward unraveling the molecular principles involved and understanding the variability in the generation, transmission, and reception of chemical signals in increasingly ecologically valid conditions. Achieving these goals will enable us to address some important societal challenges but are within reach only with the aid of genuinely interdisciplinary approaches.
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Affiliation(s)
- Helene M Loos
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV
| | - Benoist Schaal
- Development of Olfactory Cognition and Communication Lab, Centre des Sciences du Goût et de l'Alimentation, CNRS UMR 6265, Université de Bourgogne
| | - Bettina M Pause
- Department of Experimental Psychology, Heinrich-Heine-Universität Düsseldorf
| | | | - Camille Ferdenzi
- Centre de Recherche en Neurosciences de Lyon, CNRS UMR 5292, Inserm U1028, Université Claude Bernard Lyon 1, Centre Hospitalier Le Vinatier
| | | | | | - Katrin T Lübke
- Department of Experimental Psychology, Heinrich-Heine-Universität Düsseldorf
| | - Ilona Croy
- Institute for Psychology, Friedrich-Schiller-Universität Jena
| | - Jessica Freiherr
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg
| | - Moustafa Bensafi
- Centre de Recherche en Neurosciences de Lyon, CNRS UMR 5292, Inserm U1028, Université Claude Bernard Lyon 1, Centre Hospitalier Le Vinatier
| | - Thomas Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden
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3
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Science interrupted Our attempt to study disgust sensitivity and the development of political attitudes among children and their parents. Politics Life Sci 2023; 41:3-14. [PMID: 36877104 DOI: 10.1017/pls.2022.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Recent research contends that the behavioral immune system, operating largely outside conscious awareness, motivates individuals to exhibit higher levels of prejudice toward unfamiliar out-groups. This research finds that individual variance in disgust sensitivity correlates with support for political policies that facilitate the avoidance of out-groups. We were interested in developing less intrusive indicators of disgust sensitivity via olfactory measures (i.e., ratings of disgusting odors) and behavioral measures (e.g., willingness to touch disgusting objects) and studying the association between measures of disgust sensitivity and in-group bias among children and adults. We submitted a registered report to conduct this research and received an in-principle acceptance. Unfortunately, unforeseen events impaired our data collection, leaving us with a limited sample (nchildren = 32, nadults = 29) and reducing our ability to draw reliable conclusions from our results. In this essay, we describe our motivation and plan of research, the events that made completing the research impossible, and our preliminary results. In doing so, we hope to offer support for studying the effects of the behavioral immune system, even in ways that we did not originally plan. We conclude with a reflection on the value of registered reports for advancing science.
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4
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Blomkvist A, Izzo G, Vaccaro MG, La Vignera S, Brunetti A, Aversa A, Liuzza MT. The Scent of Monogamy: Self-Reported Olfactory Function Predicts Sexual Well-Being and Infidelity in an Italian Population. ARCHIVES OF SEXUAL BEHAVIOR 2022; 51:2879-2889. [PMID: 34791581 PMCID: PMC8597879 DOI: 10.1007/s10508-021-02109-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 06/16/2021] [Accepted: 07/14/2021] [Indexed: 05/11/2023]
Abstract
Previous studies have shown that olfactory function plays an essential role in the bonding of a romantic relationship. Body odors, in particular, seem involved in both mate choices and other intimate behaviors. Our sense of smell is also crucial to detect possible pathogen threats, by activating a suitable disgust reaction. Previous studies have shown that disgust sensitivity is negatively related to sociosexuality, and disgust generally inhibits our sexual drive. In the present study, we explored the possible relation between olfactory function, pathogen disgust sensitivity, sociosexuality, sexual well-being, and infidelity through a web survey. Our exploratory analyses found that, in a large Italian sample (N = 1107), among those in a stable relationship, self-reported olfactory function predicted sexual well-being (p < .05) and negatively predicted infidelity (p < .05) when controlling for other relevant sociodemographics variables. Moreover, the relation between self-reported olfactory function and sexual well-being was mediated by pathogen disgust sensitivity. Although significant, these results must be interpreted with caution, because the effect sizes were small.
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Affiliation(s)
- Anna Blomkvist
- Department of Psychology, Stockholm University, Stockholm, Sweden
| | - Giulia Izzo
- Department of Experimental and Clinical Medicine "Gaetano Salvatore", Università degli Studi "Magna Græcia" di Catanzaro, 88100, Catanzaro, Italy
| | - Maria Grazia Vaccaro
- Neuroscience Research Center, Università Degli Studi "Magna Græcia" di Catanzaro, Catanzaro, Italy
- Department of Medical and Surgical Sciences, Università degli Studi "Magna Græcia" di Catanzaro, Catanzaro, Italy
- Neuroimaging Research Unit, Institute of Molecular Bioimaging and Physiology, National Research Council, Catanzaro, Italy
| | - Sandro La Vignera
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Antonio Brunetti
- Department of Health Sciences, Università degli Studi "Magna Græcia" di Catanzaro, Catanzaro, Italy
| | - Antonio Aversa
- Department of Experimental and Clinical Medicine "Gaetano Salvatore", Università degli Studi "Magna Græcia" di Catanzaro, 88100, Catanzaro, Italy.
| | - Marco Tullio Liuzza
- Department of Medical and Surgical Sciences, Università degli Studi "Magna Græcia" di Catanzaro, Catanzaro, Italy
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5
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The Effect of Odour Valence and Odour Detection Threshold on the Withholding and Cancellation of Reach-to-Press Responses. CHEMOSENS PERCEPT 2021. [DOI: 10.1007/s12078-021-09292-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Abstract
Introduction
Withholding uninitiated actions and cancelling ongoing ones are two main components of response inhibition, a key element of the executive control. Inhibitory performance is sensitive to emotional contexts elicited by subliminal and supraliminal visual material. However, whether stimuli from other sensory modalities, such as odours, would equally modulate response inhibition remains unclear. Here, we aimed to assess the effect of task-irrelevant odours as a function of their valence and threshold on both action withholding and action cancellation of reach-to-press movements.
Method
Thirty-two healthy participants performed a Go/No-Go task that included the presentation of pleasant (orange) and unpleasant (trimethyloxazole) odour primes at supra- and sub-threshold levels; clean air was included as a control condition. The reach-to-press responses were composed of an initial release phase and a subsequent reaching phase.
Results
Only the supra-threshold pleasant (vs. control) odour impaired action withholding. Moreover, the pleasant (vs. control) odour—presented at both sub- and supra-threshold levels—elicited more accurate Go responses, whereas the sub- and supra-threshold pleasant and unpleasant (vs. control) odours triggered faster responses in the release phase. Additionally, only the supra-threshold pleasant (vs. unpleasant) odour impaired action cancellation in the reaching phase. Furthermore, reaching responses were slower following the supra-threshold unpleasant (vs. control) odour.
Conclusions
Our findings extend the sparse literature on the impact of odour stimuli on goal-directed behaviour, highlighting the role of both odour valence and threshold in the modulation of response inhibition.
Implications
Determining the mechanisms by which odour stimuli modulate response inhibition lays the foundations for research on odour-triggered disinhibition.
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6
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Li D, Wang X. The processing characteristics of bodily expressions under the odor context: An ERP study. Behav Brain Res 2021; 414:113494. [PMID: 34329669 DOI: 10.1016/j.bbr.2021.113494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 07/15/2021] [Accepted: 07/22/2021] [Indexed: 12/25/2022]
Abstract
The recognition of facial expressions has been shown to be influenced by contextual odors. The aims of this study were (1) to investigate whether odor has a similar effect on the recognition of bodily expressions, and (2) to analyze the time-course of such effects. Sixty-nine adults were randomized into three groups to identify bodily expressions (happy, fearful, and neutral) in three odor environments (pleasant odor, unpleasant odor, and no odor). Event-related potentials (ERPs) induced by the viewing bodily expressions were analyzed. Behaviorally, the unpleasant odor context promoted the recognition of bodily expressions. The ERP results showed odor influences on bodily expression recognition in two phases. In a middle stage phase (150-200 ms post-stimulus onset), VPP amplitudes induced by bodily expressions were greater in an unpleasant odor context than in a pleasant odor context. In a mid-late stage phase (beyond 200 ms), an interaction between contextual odor and bodily expression type was observed. When exposed to an unpleasant contextual odor, N2 and LPP amplitudes related to fearful bodily expressions were smaller than when exposed to other odor contexts, showing the promoting effect of mood coherence effect. Behavioral and ERP evidence confirmed that contextual odor can modulate the visual processing of bodily expressions, with an overall promoting effect of an unpleasant odor on bodily expression processing (phase one) and a specific modulating influence of odors on affectively congruent/incongruent bodily expressions (phase two).
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Affiliation(s)
- Danyang Li
- School of Psychology, Shanghai University of Sport, Shanghai, 200438, China
| | - Xiaochun Wang
- School of Psychology, Shanghai University of Sport, Shanghai, 200438, China.
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7
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Weigard A, Wilson SJ, Shapiro Z, Galloway-Long H, Huang-Pollock C. Neural correlates of working memory's suppression of aversive olfactory distraction effects. Brain Imaging Behav 2021; 15:2254-2268. [PMID: 33405095 DOI: 10.1007/s11682-020-00419-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2020] [Indexed: 10/22/2022]
Abstract
Human cognitive performance is often disrupted by distractions related to aversive stimuli and affective states, but, paradoxically, there is also evidence to suggest that high working memory demands reduce the impact of aversive distraction. Previous empirical work suggests this latter effect occurs because working memory demands reduce attention to off-task processes, but the brain regions that mediate this effect remain uncertain. The current study utilizes a novel distraction manipulation involving unpleasant odorants to identify neural structures that buffer performance from aversive distraction under high working memory demands, and to clarify their connectivity in this context. Twenty-one healthy young adults (12 women) completed a verbal n-back task under two levels of load and were concurrently exposed to either room air or aversive odorants. Three brain regions displayed increases in neural responses to olfactory distractors under high load only; the left dorsolateral prefrontal cortex, the left ventrolateral prefrontal cortex and right cerebellar Crus I. Of these regions, only the ventrolateral prefrontal cortex also displayed context-specific connectivity with a region thought to be involved in off-task processes: the dorsomedial prefrontal cortex. Overall, results suggest that, under high working memory demands, areas of the prefrontal cortex and cerebellum shield cognition from aversive distraction, potentially through interactions with brain structures involved in off-task processes.
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Affiliation(s)
- Alexander Weigard
- Department of Psychiatry, University of Michigan, Rachel Upjohn Building, Ann Arbor, MI, 48109, USA.
| | - Stephen J Wilson
- Department of Psychology, Pennsylvania State University, Moore Building, State College, PA, USA
| | - Zvi Shapiro
- Department of Psychology, Pennsylvania State University, Moore Building, State College, PA, USA
| | - Hilary Galloway-Long
- Department of Psychology, Pennsylvania State University, Moore Building, State College, PA, USA
| | - Cynthia Huang-Pollock
- Department of Psychology, Pennsylvania State University, Moore Building, State College, PA, USA
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8
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Coppin G. The COVID-19 may help enlightening how emotional food is. NPJ Sci Food 2020; 4:10. [PMID: 32821852 PMCID: PMC7423882 DOI: 10.1038/s41538-020-00071-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/29/2020] [Indexed: 11/08/2022] Open
Abstract
Olfactory and gustatory stimuli can elicit potent emotional responses and are essential in food perception. Yet, main theories of emotion often under-represent them, and our understanding of affective phenomena relies mostly on experimental studies conducted on visual and auditory stimuli. Although evidence is still accumulating today, recent findings suggest that the COVID-19 is associated with a loss in olfaction and/or taste. Here, I discuss how this unprecedented and uncommon spread of the loss of olfaction and/or taste worldwide may enlighten how emotional both these senses are and how much they influence food perception.
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Affiliation(s)
- Géraldine Coppin
- Department of Psychology, Swiss Distance University Institute, Brig, Switzerland
- Swiss Center for Affective Sciences, University of Geneva, Geneva, Switzerland
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9
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Li D, Jia J, Wang X. Unpleasant Food Odors Modulate the Processing of Facial Expressions: An Event-Related Potential Study. Front Neurosci 2020; 14:686. [PMID: 32714137 PMCID: PMC7344300 DOI: 10.3389/fnins.2020.00686] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/04/2020] [Indexed: 12/22/2022] Open
Abstract
In real-life situations, emotional information is often expressed through multiple sensory channels, with cross-talk between channels. Previous research has established that odor environments regulate the recognition of facial expressions. Therefore, this study combined event-related potentials (ERPs) with a facial emotion recognition task to investigate the effect of food odor context on the recognition of facial expressions and its time course. Fifty-four participants were asked to identify happy, fearful, and neutral faces in an odor context (pleasant, unpleasant or neutral). Electroencephalography (EEG) was performed to extract event-related potentials (ERPs). Behaviorally, unpleasant food odors triggered faster recognition of facial expressions, especially fearful ones. ERP results found that in the early stage, unpleasant food odors within 80–110 ms evoked a larger P100 amplitude than pleasant food odors and no odors, which showed that the unpleasant odor environment promoted the rapid processing of facial expressions. Next, the interaction between odor environment and facial expressions occurred during the middle stage, and the fearful expression evoked a smaller VPP (vertex positive potential) amplitude than the happy and neutral expressions when exposed to the unpleasant food odor environment. This result indicates that unpleasant odor environment consumed fewer cognitive resources when judging fearful expression, showing the promoting effect of mood coherence effect. These findings provided evidence for how people chose odor environments to facilitate the recognition of facial expressions, and highlighted the advantages of unpleasant food odors in communicating emotional information across the olfactory and visual pathways.
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Affiliation(s)
- Danyang Li
- School of Psychology, Shanghai University of Sport, Shanghai, China
| | - Jiafeng Jia
- School of Psychology, Shanghai University of Sport, Shanghai, China
| | - Xiaochun Wang
- School of Psychology, Shanghai University of Sport, Shanghai, China
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10
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Albayay J, Castiello U, Parma V. Task-irrelevant odours affect both response inhibition and response readiness in fast-paced Go/No-Go task: the case of valence. Sci Rep 2019; 9:19329. [PMID: 31852962 PMCID: PMC6920346 DOI: 10.1038/s41598-019-55977-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 12/04/2019] [Indexed: 01/06/2023] Open
Abstract
Whether emotional stimuli influence both response readiness and inhibition is highly controversial. Visual emotional stimuli appear to interfere with both under certain conditions (e.g., task relevance). Whether the effect is generalisable to salient yet task-irrelevant stimuli, such as odours, remains elusive. We tested the effect of orthonasally-presented pleasant (orange) and unpleasant odours (trimethyloxazole and hexenol) and clean air as a control on response inhibition. In emotional Go/No-Go paradigms, we manipulated the intertrial interval and ratios of Go/No-Go trials to account for motor (Experiment 1, N = 31) and cognitive (Experiment 2, N = 29) response inhibition processes. In Experiment 1, participants had greater difficulty in withholding and produced more accurate and faster Go responses under the pleasant vs. the control condition. Faster Go responses were also evident in the unpleasant vs. the control condition. In Experiment 2, neither pleasant nor unpleasant odours modulated action withholding, but both elicited more accurate and faster Go responses as compared to the control condition. Pleasant odours significantly impair action withholding (as compared to the control condition), indicating that more inhibitory resources are required to elicit successful inhibition in the presence of positive emotional information. This modulation was revealed for the motor aspect of response inhibition (fast-paced design with lower Go/No-Go trial ratio) rather than for attentional interference processes. Response readiness is critically impacted by the emotional nature of the odour (but not by its valence). Our findings highlight that the valence of task-irrelevant odour stimuli is a factor significantly influencing response inhibition.
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Affiliation(s)
- Javier Albayay
- Department of General Psychology, University of Padova, Via Venezia 8, 35131, Padova, Italy.
| | - Umberto Castiello
- Department of General Psychology, University of Padova, Via Venezia 8, 35131, Padova, Italy
| | - Valentina Parma
- Department of Psychology, Temple University, 1701 N 13th St, 19122, Philadelphia, PA, United States of America.,Neuroscience Area, International School for Advanced Studies, Via Bonomea 265, 34151, Trieste, Italy
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Hoenen M, Lübke KT, Pause BM. Empathic Cognitions Affected by Undetectable Social Chemosignals: An EEG Study on Visually Evoked Empathy for Pain in an Auditory and Chemosensory Context. Front Behav Neurosci 2018; 12:243. [PMID: 30459570 PMCID: PMC6232676 DOI: 10.3389/fnbeh.2018.00243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 09/28/2018] [Indexed: 01/10/2023] Open
Abstract
Reduction of mu activity within the EEG is an indicator of cognitive empathy and can be generated in response to visual depictions of others in pain. The current study tested whether this brain response can be modulated by an auditory and a chemosensory context. Participants observed pictures of painful and non-painful actions while pain associated and neutral exclamations were presented (Study 1, N = 30) or while chemosensory stimuli were presented via a constant flow olfactometer (Study 2, N = 22). Chemosensory stimuli were sampled on cotton pads while donors participated in a simulated job interview (stress condition) or cycled on a stationary bike (sport condition). Pure cotton was used as a control. The social chemosignals could not be detected as odors. Activity within the 8–13 Hz band at electrodes C3, C4 (mu activity) and electrodes O1, O2 (alpha-activity) was calculated using Fast-Fourier-Transformation (FFT). As expected, suppression of power in the 8–13 Hz band was stronger when painful as compared to non-painful actions were observed (Study 1, p = 0.020; Study 2, p = 0.005). In addition, as compared to the neutral auditory and chemosensory context, painful exclamations (Study 1, p = 0.039) and chemosensory stress signals (Study 2, p = 0.014) augmented mu-/alpha suppression also in response to non-painful pictures. The studies show that processing of social threat-related information is not dominated by visual information. Rather, cognitive appraisal related to empathy can be affected by painful exclamations and subthreshold chemosensory social information.
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Affiliation(s)
- Matthias Hoenen
- Institute of Experimental Psychology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Katrin T Lübke
- Institute of Experimental Psychology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Bettina M Pause
- Institute of Experimental Psychology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
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12
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Tamura K, Hamakawa M, Okamoto T. Olfactory modulation of colour working memory: How does citrus-like smell influence the memory of orange colour? PLoS One 2018; 13:e0203876. [PMID: 30212534 PMCID: PMC6136778 DOI: 10.1371/journal.pone.0203876] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 08/29/2018] [Indexed: 11/29/2022] Open
Abstract
Olfactory modulation of vision is not well understood whereas visual modulation of olfaction has been more fully investigated. This study aimed to reveal in a simple manner whether there is olfactory modulation of colour working memory using an odour that induces a citrus-like smell and is associated with orange colours. We assumed that the odour would have modulatory effects on the colour information stored in working memory. To clarify whether these effects are supportive or disruptive, during the colour working memory task we measured an event-related potential component, P3, which is involved in attentional processes of working memory. The results indicated that odour presentation mediated a decline in the rate of correct guesses for orange colours. Furthermore, the odour suppressed P3 during reddish-colour retrieval, including orange. These results suggest that colour working memory in orange can be disrupted via olfactory modulation with citrus-like odours.
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Affiliation(s)
- Kaori Tamura
- Faculty of Arts and Science, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Masayuki Hamakawa
- Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Tsuyoshi Okamoto
- Faculty of Arts and Science, Kyushu University, Nishi-ku, Fukuoka, Japan
- Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan
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13
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Syrjänen E, Wiens S, Fischer H, Zakrzewska M, Wartel A, Larsson M, Olofsson JK. Background Odors Modulate N170 ERP Component and Perception of Emotional Facial Stimuli. Front Psychol 2018; 9:1000. [PMID: 29997539 PMCID: PMC6029154 DOI: 10.3389/fpsyg.2018.01000] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 05/29/2018] [Indexed: 12/14/2022] Open
Abstract
Successful social interaction relies on the accurate decoding of other peoples’ emotional signals, and their contextual integration. However, little is known about how contextual odors may lead to modulation of cortical processing in response to facial expressions. We investigated how unpleasant and pleasant contextual background odors affected emotion perception and cortical event-related potential (ERP) responses to pictures of faces expressing happy, neutral and disgusted facial expressions. Faces were, regardless of expression, rated more positively in the pleasant odor condition and more negatively in the unpleasant odor condition. Faces were overall rated as more emotionally arousing in the presence of an odor, irrespective of its valence. Contextual odors also interacted with facial expressions, such that happy faces were rated as especially non-arousing in the unpleasant odor condition. The early, face-sensitive N170 ERP component also displayed an interaction effect. Here, disgusted faces were affected by the odor context such that the N170 revealed a relatively larger negativity in the context of a pleasant odor compared with an unpleasant odor. There were no odor effects on the responses to faces in other measured ERP components (P1, VPP, P2, and LPP). These results suggest that odors bias socioemotional perception early stages of the visual processing stream. However, effects may vary across emotional expressions and measurements.
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Affiliation(s)
- Elmeri Syrjänen
- Department of Psychology, Stockholm University, Stockholm, Sweden
| | - Stefan Wiens
- Department of Psychology, Stockholm University, Stockholm, Sweden
| | - Håkan Fischer
- Department of Psychology, Stockholm University, Stockholm, Sweden
| | - Marta Zakrzewska
- Department of Psychology, Stockholm University, Stockholm, Sweden
| | - Andreas Wartel
- Department of Psychology, Stockholm University, Stockholm, Sweden
| | - Maria Larsson
- Department of Psychology, Stockholm University, Stockholm, Sweden
| | - Jonas K Olofsson
- Department of Psychology, Stockholm University, Stockholm, Sweden
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14
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Siedlecka E, Denson TF. Experimental Methods for Inducing Basic Emotions: A Qualitative Review. EMOTION REVIEW 2018. [DOI: 10.1177/1754073917749016] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Experimental emotion inductions provide the strongest causal evidence of the effects of emotions on psychological and physiological outcomes. In the present qualitative review, we evaluated five common experimental emotion induction techniques: visual stimuli, music, autobiographical recall, situational procedures, and imagery. For each technique, we discuss the extent to which they induce six basic emotions: anger, disgust, surprise, happiness, fear, and sadness. For each emotion, we discuss the relative influences of the induction methods on subjective emotional experience and physiological responses (e.g., heart rate, blood pressure). Based on the literature reviewed, we make emotion-specific recommendations for induction methods to use in experiments.
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Abstract
In humans, stress can be contagiously transmitted via chemosignals on a subconscious level. This study investigates how pregnancy affects neural responses to anxiety chemosignals. Using cotton pads, 28 men donated axillary sweat immediately before an academic examination (anxiety sweat) and during ergometer training (control). Via a constant-flow olfactometer, samples were presented (oddball paradigm) to 12 non-pregnant (NP) women, 14 women in their first (T1), and 18 in their third (T3) trimester of pregnancy. Chemosensory event-related potentials and current source densities (CSD) were analysed (60 electrode setup). Compared to NP-women, pregnant women display diminished evaluative processing of the sweat samples (targets; P3-1/ P3-2 amplitudes) and delayed evaluative processing of the anxiety sweat (targets; P3-2 latency). T3-women show attenuated early processing (targets; N1 amplitude) compared to NP-women, and reduced evaluative processing compared to T1-women (standards; P3-2 amplitude). CSDs (P3-1/ P3-2 latency ranges) reveal that T1- and T3-women show an atypical activation distribution to anxiety sweat. Most participants were unable to detect the sweat samples (anxiety sweat: 79.5%, sport sweat 88.6%). The results demonstrate that the processing of anxiety chemosignals progressively vanishes during pregnancy. This effect is likely to occur without any cognitive control.
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Syrjänen E, Liuzza MT, Fischer H, Olofsson JK. Do Valenced Odors and Trait Body Odor Disgust Affect Evaluation of Emotion in Dynamic Faces? Perception 2017; 46:1412-1426. [DOI: 10.1177/0301006617720831] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Disgust is a core emotion evolved to detect and avoid the ingestion of poisonous food as well as the contact with pathogens and other harmful agents. Previous research has shown that multisensory presentation of olfactory and visual information may strengthen the processing of disgust-relevant information. However, it is not known whether these findings extend to dynamic facial stimuli that changes from neutral to emotionally expressive, or if individual differences in trait body odor disgust may influence the processing of disgust-related information. In this preregistered study, we tested whether a classification of dynamic facial expressions as happy or disgusted, and an emotional evaluation of these facial expressions, would be affected by individual differences in body odor disgust sensitivity, and by exposure to a sweat-like, negatively valenced odor (valeric acid), as compared with a soap-like, positively valenced odor (lilac essence) or a no-odor control. Using Bayesian hypothesis testing, we found evidence that odors do not affect recognition of emotion in dynamic faces even when body odor disgust sensitivity was used as moderator. However, an exploratory analysis suggested that an unpleasant odor context may cause faster RTs for faces, independent of their emotional expression. Our results further our understanding of the scope and limits of odor effects on facial perception affect and suggest further studies should focus on reproducibility, specifying experimental circumstances where odor effects on facial expressions may be present versus absent.
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Affiliation(s)
| | - Marco Tullio Liuzza
- Stockholm University, Stockholm, Sweden; Magna Græcia University, Catanzaro, Italy
| | | | - Jonas K. Olofsson
- Stockholm University, Stockholm, Sweden; Swedish Collegium for Advanced Study, Uppsala, Sweden
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17
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Is elaboration of affective content sufficient to attenuate emotional responses during reappraisal procedures? Biol Psychol 2017; 127:99-107. [DOI: 10.1016/j.biopsycho.2017.05.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 05/08/2017] [Accepted: 05/10/2017] [Indexed: 11/22/2022]
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18
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Herten N, Pomrehn D, Wolf OT. Memory for objects and startle responsivity in the immediate aftermath of exposure to the Trier Social Stress Test. Behav Brain Res 2017; 326:272-280. [PMID: 28315373 DOI: 10.1016/j.bbr.2017.03.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 02/22/2017] [Indexed: 01/18/2023]
Abstract
Previously, we observed enhanced long-term memory for objects used (central objects) by committee members in the Trier Social Stress Test (TSST) on the next day. In addition, startle responsivity was increased. However, response specificity to an odour involved in the stressful episode was lacking and recognition memory for the odour was poor. In the current experiments, immediate effects of the stressor on memory and startle responsivity were investigated. We hypothesised memory for central objects of the stressful episode and startle response specificity to an odour ambient during the TSST to be enhanced shortly after it, in contrast to the control condition (friendly TSST). Further, memory for this odour was also assumed to be increased in the stress group. We tested 70 male (35) and female participants using the TSST involving objects and an ambient odour. After stress induction, a startle paradigm including olfactory and visual stimuli was conducted. Indeed, memory for central objects was significantly enhanced in immediate aftermath of the stressor. Startle responsivity increased at a trend level, particularly with regard to the odour involved in the stressful episode. Moreover, the stress group descriptively tended towards a better recognition of the odour involved. The study shows that stress enhances memory for central aspects of a stressful situation before consolidation processes come into play. In addition, results preliminarily suggest that the impact of stress on startle responsivity increases in strength but decreases in specificity during the first 24h after stress exposure.
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Affiliation(s)
- Nadja Herten
- Department of Cognitive Psychology, Faculty of Psychology, Ruhr-University Bochum, Universitätsstraße 150, D-44780 Bochum, Germany; International Graduate School of Neuroscience (IGSN), Ruhr-University Bochum, Germany.
| | - Dennis Pomrehn
- Department of Cognitive Psychology, Faculty of Psychology, Ruhr-University Bochum, Universitätsstraße 150, D-44780 Bochum, Germany.
| | - Oliver T Wolf
- Department of Cognitive Psychology, Faculty of Psychology, Ruhr-University Bochum, Universitätsstraße 150, D-44780 Bochum, Germany; International Graduate School of Neuroscience (IGSN), Ruhr-University Bochum, Germany.
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19
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Schweiger Gallo I, Fernández-Dols JM, Gollwitzer PM, Keil A. Grima: A Distinct Emotion Concept? Front Psychol 2017; 8:131. [PMID: 28217102 PMCID: PMC5289974 DOI: 10.3389/fpsyg.2017.00131] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 01/18/2017] [Indexed: 11/26/2022] Open
Abstract
People experience an unpleasant sensation when hearing a scratch on a board or plate. The present research focuses on this aversive experience known in Spanish as ‘grima’ with no equivalent term in English and German. We hypothesized that this aversive experience constitutes a distinctive, separate emotional concept. In Study 1, we found that the affective meaning of ‘grima’ was closer to disgust than to other emotion concepts. Thus, in Study 2 we explored the features of grima and compared them with disgust. As grima was reported to be predominantly elicited by certain auditory stimuli and associated with a distinctive physiological pattern, Study 3 used direct measures of physiological arousal to test the assumption of a distinctive pattern of physiological responses elicited by auditory stimuli of grima and disgust, and found different effects on heart rate but not on skin conductance. In Study 4, we hypothesized that only participants with an implementation intention geared toward down-regulating grima would be able to successfully weaken the grima- but not disgust- experience. Importantly, this effect was specific as it held true for the grima-eliciting sounds only, but did not affect disgust-related sounds. Finally, Study 5 found that English and German speakers lack a single accessible linguistic label for the pattern of aversive reactions termed by Spanish speaking individuals as ‘grima’, whereas the elicitors of other emotions were accessible and accurately identified by German, English, as well as Spanish speakers.
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Affiliation(s)
- Inge Schweiger Gallo
- Facultad de Ciencias Políticas y Sociología, Departamento de Psicología Social, Universidad Complutense de Madrid Madrid, Spain
| | - José-Miguel Fernández-Dols
- Facultad de Psicología, Departamento de Psicología Social y Metodología, Universidad Autónoma de Madrid Madrid, Spain
| | - Peter M Gollwitzer
- Motivation Lab, Psychology Department, New York UniversityNew York, NY, USA; Social Psychology and Motivation, Department of Psychology, University of KonstanzKonstanz, Germany
| | - Andreas Keil
- Center for the Study of Emotion and Attention, University of Florida Gainesville, FL, USA
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20
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Cerebral bases of emotion regulation toward odours: A first approach. Behav Brain Res 2017; 317:37-45. [DOI: 10.1016/j.bbr.2016.09.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 09/05/2016] [Accepted: 09/11/2016] [Indexed: 01/29/2023]
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21
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Coppin G, Parma V, Pause BM. Editorial: Affective Sciences through the Chemical Senses. Front Psychol 2016; 7:1590. [PMID: 27807423 PMCID: PMC5069419 DOI: 10.3389/fpsyg.2016.01590] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/29/2016] [Indexed: 11/13/2022] Open
Affiliation(s)
- Géraldine Coppin
- Translational Neurocircuitry Group, Max Planck for Metabolism ResearchCologne, Germany; Swiss Center for Affective SciencesGeneva, Switzerland; Laboratory for the Study of Emotion Elicitation and Expression, Department of Psychology, University of GenevaGeneva, Switzerland
| | - Valentina Parma
- Neuroscience Area, International School for Advanced Studies (SISSA)Trieste, Italy; Monell Chemical Senses CenterPhiladelphia, PA, USA; Department of Clinical Neuroscience, Karolinska InstitutetStockholm, Sweden; Center for Autism Research, The Children's Hospital of PhiladelphiaPA, USA
| | - Bettina M Pause
- Department of Experimental Psychology, Heinrich-Heine-University of Düsseldorf Düsseldorf, Germany
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22
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Lorenzen A, Scholz-Hehn D, Wiesner CD, Wolff S, Bergmann TO, van Eimeren T, Lentfer L, Baving L, Prehn-Kristensen A. Chemosensory processing in children with attention-deficit/hyperactivity disorder. J Psychiatr Res 2016; 76:121-7. [PMID: 26926800 DOI: 10.1016/j.jpsychires.2016.02.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 02/12/2016] [Accepted: 02/12/2016] [Indexed: 11/18/2022]
Abstract
BACKGROUND In attention-deficit/hyperactivity disorder (ADHD) not only deficits in dopamine-related cognitive functioning have been found but also a lower dopamine-sensitive olfactory threshold. The aim of the present study was to proof that only olfactory but not trigeminal sensitivity is increased in ADHD. Structural magnetic resonance imaging (MRI) was used to show increased olfactory bulb (OB) volume- a structure which is strongly shaped by olfactory performance through the mechanism of neuroplasticity (e.g. synaptogenesis). To elucidate whether cortical mechanisms are involved in altered olfaction in ADHD, functional MRI (fMRI) was introduced. METHODS A total of 18 boys with ADHD and 17 healthy controls (aged 7-12) were included in the study. Olfactory as well as trigeminal detection thresholds were examined. OB sizes were measured by means of structural MRI and an analysis of effective functional (fMRI) coupling of primary olfactory cortex was conducted. The frontal piriform cortex (fPIR) was chosen as seed region because of its importance in processing both trigeminal and olfactory stimuli as well as having profound influence on inner OB-signaling. RESULTS Increased olfactory sensitivity as well as an increase in OB volume was found in ADHD. There were no group differences in sensitivity towards a trigeminal stimulus. Compared to healthy controls, the fPIR in ADHD was more positively coupled with structures belonging to the salience network during olfactory and, to a lesser extent, during trigeminal stimulation. CONCLUSIONS Olfactory functioning is superior in subjects with ADHD. The observed increase in OB volume may relate to higher olfactory sensitivity in terms of neuroplasticity. During the processing of chemosensory stimuli, the primary olfactory cortex in ADHD is differently coupled to higher cortical structures which might indicate an altered top-down influence on OB structure and function.
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Affiliation(s)
- Anna Lorenzen
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Schleswig-Holstein, Niemannsweg 147, 24105, Kiel, Germany.
| | - Deborah Scholz-Hehn
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Schleswig-Holstein, Niemannsweg 147, 24105, Kiel, Germany.
| | - Christian D Wiesner
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Schleswig-Holstein, Niemannsweg 147, 24105, Kiel, Germany.
| | - Stephan Wolff
- Department of Neuroradiology, University Hospital Schleswig-Holstein, Arnold- Heller-Str. 3, 24105, Kiel, Germany.
| | - Til O Bergmann
- Department of Neurology & Stroke, and Hertie Institute for Clinical Brain Research, University of Tübingen, Ottfried-Müller-Str. 25, 72076, Tübingen, Germany; Institute for Medical Psychology and Behavioral Neurobiology, University of Tübingen, Ottfried-Müller-Str. 25, 72076, Tübingen, Germany; Institute of Psychology, Christian-Albrechts University of Kiel, Olshausenstr. 62, 24118, Kiel, Germany.
| | - Thilo van Eimeren
- Department of Nuclear Medicine, University Hospital, Kerpenerstr. 62, 50937, Cologne, Germany; Department of Neurology, University Hospital, Kerpenerstr. 62, 50937, Cologne, Germany.
| | - Luisa Lentfer
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Schleswig-Holstein, Niemannsweg 147, 24105, Kiel, Germany.
| | - Lioba Baving
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Schleswig-Holstein, Niemannsweg 147, 24105, Kiel, Germany.
| | - Alexander Prehn-Kristensen
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Schleswig-Holstein, Niemannsweg 147, 24105, Kiel, Germany.
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23
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Hoenen M, Müller K, Pause BM, Lübke KT. Fancy Citrus, Feel Good: Positive Judgment of Citrus Odor, but Not the Odor Itself, Is Associated with Elevated Mood during Experienced Helplessness. Front Psychol 2016; 7:74. [PMID: 26869973 PMCID: PMC4735708 DOI: 10.3389/fpsyg.2016.00074] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 01/13/2016] [Indexed: 11/15/2022] Open
Abstract
Aromatherapy claims that citrus essential oils exert mood lifting effects. Controlled studies, however, have yielded inconsistent results. Notably, studies so far did not control for odor pleasantness, although pleasantness is a critical determinant of emotional responses to odors. This study investigates mood lifting effects of d-(+)-limonene, the most prominent substance in citrus essential oils, with respect to odor quality judgments. Negative mood was induced within 78 participants using a helplessness paradigm (unsolvable social discrimination task). During this task, participants were continuously (mean duration: 19.5 min) exposed to d-(+)-limonene (n = 25), vanillin (n = 26), or diethyl phthalate (n = 27). Participants described their mood (Self-Assessment-Manikin, basic emotion ratings) and judged the odors’ quality (intensity, pleasantness, unpleasantness, familiarity) prior to and following the helplessness induction. The participants were in a less positive mood after the helplessness induction (p < 0.001), irrespective of the odor condition. Still, the more pleasant the participants judged the odors, the less effective the helplessness induction was in reducing happiness (p = 0.019). The results show no odor specific mood lifting effect of d-(+)-limonene, but indicate a positive effect of odor pleasantness on mood. The study highlights the necessity to evaluate odor judgments in aromatherapy research.
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Affiliation(s)
- Matthias Hoenen
- Institute of Experimental Psychology, Heinrich Heine University Düsseldorf Düsseldorf, Germany
| | - Katharina Müller
- Institute of Experimental Psychology, Heinrich Heine University DüsseldorfDüsseldorf, Germany; Federal Employment Agency GermanyNürnberg, Germany
| | - Bettina M Pause
- Institute of Experimental Psychology, Heinrich Heine University Düsseldorf Düsseldorf, Germany
| | - Katrin T Lübke
- Institute of Experimental Psychology, Heinrich Heine University Düsseldorf Düsseldorf, Germany
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24
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Pellegrino R, Crandall PG, Seo HS. Using Olfaction and Unpleasant Reminders to Reduce the Intention-behavior Gap in Hand Washing. Sci Rep 2016; 6:18890. [PMID: 26732033 PMCID: PMC4702082 DOI: 10.1038/srep18890] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/27/2015] [Indexed: 11/27/2022] Open
Abstract
Lack of hand washing is a leading cause of food borne illnesses. To successfully increase hand hygiene compliance, interventions must have continual engagement with employees. This study used a real-time prospective memory (PM) scenario to measure the effectiveness of a control and sensory reminders of disgust to influence hand washing behavior and performance. First, a model of hand washing performance was built by having six participants' hands contaminated with GermGlo (a florescent micro-particle) and then washed their hands using predetermined protocols while monitored by an electronic hand hygiene verification (HHV) system. Next, eighty Hispanic/Latino participants, in a between-group experimental design, performed a PM experiment while one of four reminders were present (hand washing poster, disgusting image, disgusting sound, and disgusting odor) as the HHV recorded their hand washing performance. Visual cues, typical of hand washing campaigns, were not as effective at increasing hand hygiene compliance as disgust-induced sensory cues. Furthermore, olfactory disgust showed a significantly higher probability that individuals would engage in hand washing behaviors than all other conditions. This study provides new insight into the effectiveness of different senses and emotion to reduce the intention-behavior gap associated with modifying behaviors, and broadens current PM research to a real-time application.
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Affiliation(s)
- Robert Pellegrino
- Department of Food Science, University of Arkansas, Fayetteville, AR 72704
| | - Philip G. Crandall
- Department of Food Science, University of Arkansas, Fayetteville, AR 72704
| | - Han-Seok Seo
- Department of Food Science, University of Arkansas, Fayetteville, AR 72704
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25
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Pacharra M, Schäper M, Kleinbeck S, Blaszkewicz M, Wolf OT, van Thriel C. Stress lowers the detection threshold for foul-smelling 2-mercaptoethanol. Stress 2016; 19:18-27. [PMID: 26553419 DOI: 10.3109/10253890.2015.1105212] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Previous studies have reported enhanced vigilance for threat-related information in response to acute stress. While it is known that acute stress modulates sensory systems in humans, its impact on olfaction and the olfactory detection of potential threats is less clear. Two psychophysical experiments examined, if acute stress lowers the detection threshold for foul-smelling 2-mercaptoethanol. Participants in Experiment 1 (N = 30) and Experiment 2 (N = 32) were randomly allocated to a control group or a stress group. Participants in the stress group underwent a purely psychosocial stressor (public mental arithmetic) in Experiment 1 and a stressor that combined a physically demanding task with social-evaluative threat in Experiment 2 (socially evaluated cold-pressor test). In both experiments, olfactory detection thresholds were repeatedly assessed by means of dynamic dilution olfactometry. Each threshold measurement consisted of three trials conducted using an ascending method of limits. Participants in the stress groups showed the expected changes in heart rate, salivary cortisol, and mood measures in response to stress. About 20 min after the stressor, participants in the stress groups could detect 2-mercaptoethanol at a lower concentration than participants in the corresponding control groups. Our results show that acute stress lowers the detection threshold for a malodor.
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Affiliation(s)
- Marlene Pacharra
- a Leibniz Research Centre for Working Environment and Human Factors at the TU Dortmund University , Dortmund , Germany and
| | - Michael Schäper
- a Leibniz Research Centre for Working Environment and Human Factors at the TU Dortmund University , Dortmund , Germany and
| | - Stefan Kleinbeck
- a Leibniz Research Centre for Working Environment and Human Factors at the TU Dortmund University , Dortmund , Germany and
| | - Meinolf Blaszkewicz
- a Leibniz Research Centre for Working Environment and Human Factors at the TU Dortmund University , Dortmund , Germany and
| | - Oliver T Wolf
- b Department of Cognitive Psychology , Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr-University Bochum , Bochum , Germany
| | - Christoph van Thriel
- a Leibniz Research Centre for Working Environment and Human Factors at the TU Dortmund University , Dortmund , Germany and
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26
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Human amygdala activations during nasal chemoreception. Neuropsychologia 2015; 78:171-94. [PMID: 26459095 DOI: 10.1016/j.neuropsychologia.2015.10.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 08/25/2015] [Accepted: 10/06/2015] [Indexed: 02/07/2023]
Abstract
This review serves as a comprehensive discussion of chemosensory stimulation of the amygdala in healthy humans. Following an introduction of the neuroanatomy of chemosensory processing in primary and secondary olfactory structures, functional resonance magnetic imaging and positron imaging tomography studies are systematically categorized based on valence of stimuli, stimulus concentration, and paradigm-dependent amygdala activation. The amygdala shows patterns of lateralization due to stimulus valence. Main findings include pleasant odors being associated with bilateral or left amygdala activation, and unpleasant odors being associated with activation of the right amygdala, suggesting a crucial role of the right amygdala in evolutionary preservation. Potentially threatening social stimuli, however, might be processed apart from the olfactory system and tend to activate the left amygdala. Amygdala response to chemosensory stimuli correlated with simultaneous activation in the orbitofrontal cortex (OFC), piriform cortex (PC), and insula, suggesting a close-knit network of these areas during stimulus processing.
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Parma V, Ferraro S, Miller SS, Åhs F, Lundström JN. Enhancement of Odor Sensitivity Following Repeated Odor and Visual Fear Conditioning. Chem Senses 2015; 40:497-506. [DOI: 10.1093/chemse/bjv033] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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28
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Conzelmann A, McGregor V, Pauli P. Emotion regulation of the affect-modulated startle reflex during different picture categories. Psychophysiology 2015; 52:1257-62. [PMID: 26061976 DOI: 10.1111/psyp.12450] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 03/27/2015] [Indexed: 11/29/2022]
Abstract
Previous studies on emotion regulation of the startle reflex found an increase in startle amplitude from down-, to non-, to up-regulation for pleasant and unpleasant stimuli. We wanted to clarify whether this regulation effect remains stable for different picture categories within pleasant and unpleasant picture sets. We assessed startle amplitude of 31 participants during down-, non-, or up-regulation of feelings elicited by pleasant erotic and adventure and unpleasant victim and threat pictures. Startle amplitude was smaller during adventure and erotic compared to victim and threat pictures and increased from down-, to non-, to up-regulation independently of the picture category. Results indicate that the motivational priming effect on startle modulation elicited by different picture categories is independent of emotion regulation instructions. In addition, the emotion regulation effect is independent of motivational priming effects.
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Affiliation(s)
- Annette Conzelmann
- Department of Psychology (Biological Psychology, Clinical Psychology, and Psychotherapy), University of Würzburg, Würzburg, Germany.,Department of Child and Adolescent Psychiatry and Psychotherapy, University of Tübingen, Tübingen, Germany
| | - Victoria McGregor
- Department of Psychology (Biological Psychology, Clinical Psychology, and Psychotherapy), University of Würzburg, Würzburg, Germany
| | - Paul Pauli
- Department of Psychology (Biological Psychology, Clinical Psychology, and Psychotherapy), University of Würzburg, Würzburg, Germany
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29
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Pellegrino R, Crandall PG, O'Bryan CA, Seo HS. A review of motivational models for improving hand hygiene among an increasingly diverse food service workforce. Food Control 2015. [DOI: 10.1016/j.foodcont.2014.09.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Adolph D, Meister L, Pause BM. Context counts! social anxiety modulates the processing of fearful faces in the context of chemosensory anxiety signals. Front Hum Neurosci 2013; 7:283. [PMID: 23801951 PMCID: PMC3685720 DOI: 10.3389/fnhum.2013.00283] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 05/30/2013] [Indexed: 12/02/2022] Open
Abstract
During emotion perception, context is an important source of information. Whether contextual cues from modalities other than vision or audition influence the perception of social emotional information has not been investigated. Thus, the present study aimed at testing emotion perception and regulation in response to fearful facial expressions presented in the context of chemosensory stimuli derived from sweat of anxious individuals. In groups of high (HSA) and low socially anxious (LSA) participants we recorded the startle reflex (Experiment I), and analysed event-related potentials (ERPs; Experiment II) while they viewed anxious facial expressions in the context of chemosensory anxiety signals and chemosensory control stimuli. Results revealed that N1/P1 and N170 amplitudes were larger while late positive potential (LPP) activity was smaller for facial expressions presented in the context of the anxiety and the chemosensory control stimulus as compared to facial expressions without a chemosensory context. Furthermore, HSA participants were highly sensitive to the contextual anxiety signals. They showed enhanced motivated attention allocation (LPP, Study II), as well as larger startle responses toward faces in the context of chemosensory anxiety signals than did LSA participants (Study I). Chemosensory context had no effect on emotion regulation, and both LSA and HSA participants showed effective emotion regulation (Study I and II). In conclusion, both anxiety and chemosensory sport context stimuli enhanced early attention allocation and structural encoding, but diminished motivated attention allocation to the facial expressions. The current results show that visual and chemosensory information is integrated on virtually all levels of stimulus processing and that socially anxious individuals might be especially sensitive to chemosensory contextual social information.
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Affiliation(s)
- Dirk Adolph
- Department of Psychology, Ruhr-University Bochum, Germany
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31
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Pause BM, Zlomuzica A, Kinugawa K, Mariani J, Pietrowsky R, Dere E. Perspectives on episodic-like and episodic memory. Front Behav Neurosci 2013; 7:33. [PMID: 23616754 PMCID: PMC3629296 DOI: 10.3389/fnbeh.2013.00033] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 04/06/2013] [Indexed: 11/30/2022] Open
Abstract
Episodic memory refers to the conscious recollection of a personal experience that contains information on what has happened and also where and when it happened. Recollection from episodic memory also implies a kind of first-person subjectivity that has been termed autonoetic consciousness. Episodic memory is extremely sensitive to cerebral aging and neurodegenerative diseases. In Alzheimer’s disease deficits in episodic memory function are among the first cognitive symptoms observed. Furthermore, impaired episodic memory function is also observed in a variety of other neuropsychiatric diseases including dissociative disorders, schizophrenia, and Parkinson disease. Unfortunately, it is quite difficult to induce and measure episodic memories in the laboratory and it is even more difficult to measure it in clinical populations. Presently, the tests used to assess episodic memory function do not comply with even down-sized definitions of episodic-like memory as a memory for what happened, where, and when. They also require sophisticated verbal competences and are difficult to apply to patient populations. In this review, we will summarize the progress made in defining behavioral criteria of episodic-like memory in animals (and humans) as well as the perspectives in developing novel tests of human episodic memory which can also account for phenomenological aspects of episodic memory such as autonoetic awareness. We will also define basic behavioral, procedural, and phenomenological criteria which might be helpful for the development of a valid and reliable clinical test of human episodic memory.
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Affiliation(s)
- Bettina M Pause
- Institute of Experimental Psychology, University of Düsseldorf Düsseldorf, Germany
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