Multivariate spectral analysis for identifying the brain activations during olfactory perception

Kroupi, Eleni; Yazdani, Amirmehdi; Vesin, Jean‐Marc; Ebrahimi, Touradj

doi:10.1109/embc.2012.6347403

Cited by 10 publications

(7 citation statements)

References 12 publications

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“…In particular, completing data from previous neuroimaging studies, the first interesting finding is that OC might increase the activity in the entorhinal cortex and hippocampus, as well as in PHG8, suggesting that the visual cortex may be involved in visual-olfactory interaction12181920 and addressing the decreased glucose uptake found in OFC to the ‘on-off switch' behavior16. This region was similarly activated in response to all odor mixtures and deactivated in response to single odorants.…”

Section: Discussionsupporting

confidence: 58%

Cortico-subcortical metabolic correlates of olfactory processing in healthy resting subjects

Alessandrini

Micarelli

Chiaravalloti

et al. 2014

Sci Rep

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A wide network of interconnected areas was previously found in neuroimaging studies involving normal as well as pathological subjects; however literature seems to suffer from a lack of investigation in glucose metabolism behaviour under olfactory condition. Thus, the present work describe for the first time a pure olfactory related brain response of metabolism by using 18F-fluorodeoxyglucose-Positron Emission Tomography/Computer Tomography in eleven resting subjects undergoing a neutral and a pure olfactory condition. By contrasting these experimental phases, it was possible to depict a re-organization pattern of default mode network structures in a relatively ecological environment. Moreover, by correlating such pattern with a battery of validated olfactory and neuropsychological tests, our work allowed in showing peculiar correlation data that could cluster the subjects sample in a certain range of normality. We believe the present study could integrate the current knowledge in olfactory research and could be a start-up for future contributions.

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Section: Discussionsupporting

confidence: 58%

Cortico-subcortical metabolic correlates of olfactory processing in healthy resting subjects

Alessandrini

Micarelli

Chiaravalloti

et al. 2014

Sci Rep

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“…One of the main tools of brain research is electroencephalography (EEG) which has been widely used in studies that investigate associations between emotions and brain activity. In particular, power spectral density in various EEG frequency bands, among other EEG features, is highly associated with pleasant and unpleasant emotions elicited by various stimuli [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Phase-Amplitude Coupling between EEG and EDA While Experiencing Multimedia Content

Kroupi

Vesin

Ebrahimi

2013

2013 Humaine Association Conference on Affective Computing and Intelligent Interaction

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Abstract-Emotion is a dynamic process that affects social relationships and influences the mechanisms of rational thinking and decision making. The influence of emotion on reasoning has gained a lot of attention in computer science. One approach to incorporating emotions into computers is by extracting features from various physiological signals and inferring the corresponding emotions or emotional dimensions. However, physiological processes are dynamic rather than static, and physiological signals mainly interact with each other during emotional processes rather than act individually. This study suggests that dynamical interdependencies of various signals that emanate from either the peripheral nervous system or the central nervous system might be involved in the emotional experience. Specifically, EEG (electroencephalography) signals captured from the temporal lobe are coupled with a narrow-band skin conductance response (SCR) while subjects are watching music clips, indicating that signals from the auditory cortex interact with SCR during this experience.

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“…In the past, wearing the EEG equipment on the scalp was inconvenient and difficult. Further, the test preparation time and measurement time were highly time consuming . However, the advantages of this study are the ease in wearing the equipment and the short test time.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, all participants responded that this test method is novel and easy for both the participants and tester. Therefore, the disadvantages of the old EEG test (lengthy test time and difficulty in wearing equipment and test preparation) were overcome by this new method. From the participants’ standpoint, the advantages of the new test method affected the results positively, as the fragrance's definite effect on the feeling can be distinguished easily.…”

Section: Resultsmentioning

confidence: 99%

“…EEG is a universally used device for brainwave measurements and can verify the brain activity using numerous brainwaves. The measurement is performed based on the International 10-20 system, and the wavelengths are classified into delta (0.5-4 Hz), theta (4-8 Hz), alpha (8)(9)(10)(11)(12)(13), beta (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), and gamma . Through the association between brainwave and fragrance, the effects of fragrance on mood and preference can be verified.…”

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confidence: 99%

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Evaluation of human electroencephalogram change for sensory effects of fragrance

Park¹,

Kim²,

Oh³

et al. 2019

Skin Research and Technology

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Background The stabilizing effect of lavender and the arousal effect of peppermint essential oils are acknowledged and used widely in aromatherapy and the cosmetics industry. However, no evaluation method confirms the effects of essential oils through quantitative and objective electroencephalogram (EEG) results; instead, only a psychological and subjective method exists. Therefore, this study aims to create a new emotional cosmetic evaluation paradigm using EEG values. Moreover, it enables quantitative interpretation of the results in addition to the subjective survey outcomes. Methods For this study, 12 healthy female Korean participants were recruited and three fragrances were used. The EEG results were collected for 3 minutes (1 minute each before, during, and after inhalation of every fragrance). Results The quantitative EEG outcomes indicate changes in the participant's brainwaves before and after inhalation. Significant changes in the EEG were observed. Based on the results, the effects of fragrances were confirmed to be stabilizing for lavender, and arousing for peppermint and coffee aroma. Furthermore, the subjective questionnaire results indicate similar tendency as that of the quantitative EEG results. Conclusion In addition to psychological and subjective assessments, our emotional evaluation method can verify the cosmetic fragrance effects through quantitative and objective results.

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Multivariate spectral analysis for identifying the brain activations during olfactory perception

Cited by 10 publications

References 12 publications

Cortico-subcortical metabolic correlates of olfactory processing in healthy resting subjects

Cortico-subcortical metabolic correlates of olfactory processing in healthy resting subjects

Phase-Amplitude Coupling between EEG and EDA While Experiencing Multimedia Content

Evaluation of human electroencephalogram change for sensory effects of fragrance

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