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Wunder A, Ludwig J, Haertl T, Arnhardt S, Schwinn L, Chellapandian DC, Weinmair E, Mühle C, Thürauf N, Kornhuber J, Rohleder N, Loos HM, Freiherr J. Can you smell my stress? Influence of stress chemosignals on empathy and emotion recognition in depressed individuals and healthy controls. Physiol Behav 2023; 270:114309. [PMID: 37517662 DOI: 10.1016/j.physbeh.2023.114309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/29/2023] [Accepted: 07/27/2023] [Indexed: 08/01/2023]
Abstract
Human body odors contain chemical signals that play a key role in our non-verbal communication regarding health, genetic identity, immune system, fitness, and emotional state. Studies on human chemosignaling in individuals with psychiatric diseases are scarce but indicate altered smell perception and emotion recognition in depressed individuals. In the present project, we aimed to investigate the influence of chemosensory substances in social stress sweat on emotion recognition, perspective taking, affective responsiveness as well as stress level in healthy and depressed individuals. Therefore, chemosensory stimuli (sweat samples from Trier social stress test (TSST) and friendly-TSST (fTSST)) were obtained from 39 healthy participants (19 females). In a next step, chemosensory stimuli and an odor-free blank (cotton pad) were used to stimulate another group of 40 healthy participants (20 females) and 37 individuals with depression (24 females). Those stimuli were examined regarding their influence on subjective feelings of stress, emotion perception and empathic reactions using an empathy test. Furthermore, physiological data (breathing, heart rate, skin conductance response, stress hormones) of the participants were collected during chemosensory stimulation. Depressed individuals improved their ability of perspective taking and affective responsiveness for the emotion grief when presented with stress chemosignals compared to no chemosignals. Healthy individuals remained unaffected regarding perspective taking and affective responsiveness. Both depressed and healthy individuals showed no increased stress hormone cortisol and α-amylase values during the social stress chemosignals condition, but reduced values for fTSST condition compared to no chemosignals respectively. The results imply that stress chemosignals do not trigger a stress reaction, but for depressed individuals they lead to a better emotion assessment for grief. This research contributes to a deeper understanding of the effects of social stress chemosignals on healthy and depressed individuals. Knowing the impact of human chemosignals on emotional processing is crucial for a better understanding of non-verbal human interaction.
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Affiliation(s)
- Annkatrin Wunder
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Psychiatry and Psychotherapy, Schwabachanlage 6, 91054 Erlangen, Germany.
| | - Janina Ludwig
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Psychiatry and Psychotherapy, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Tobias Haertl
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Chair of Aroma and Smell Research, Department of Chemistry and Pharmacy, Henkestrasse 9, 91054 Erlangen, Germany
| | - Sally Arnhardt
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Psychiatry and Psychotherapy, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Leo Schwinn
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Machine Learning and Data Analytics Lab, Department Artificial Intelligence in Biomedical Engineering, Carl-Thiersch-Strasse 2b, 91052 Erlangen, Germany
| | - Deepak Charles Chellapandian
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Psychiatry and Psychotherapy, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Elisabeth Weinmair
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Chair of Health Psychology, Department of Psychology, Nägelsbachstrasse 49a, 91052 Erlangen, Germany
| | - Christiane Mühle
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Psychiatry and Psychotherapy, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Norbert Thürauf
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Psychiatry and Psychotherapy, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Johannes Kornhuber
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Psychiatry and Psychotherapy, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Nicolas Rohleder
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Chair of Health Psychology, Department of Psychology, Nägelsbachstrasse 49a, 91052 Erlangen, Germany
| | - Helene M Loos
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Chair of Aroma and Smell Research, Department of Chemistry and Pharmacy, Henkestrasse 9, 91054 Erlangen, Germany; Fraunhofer Institute for Process Engeneering and Packaging (IVV), Giggenhauser Str. 35, 85354 Freising, Germany
| | - Jessica Freiherr
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Psychiatry and Psychotherapy, Schwabachanlage 6, 91054 Erlangen, Germany; Fraunhofer Institute for Process Engineering and Packaging (IVV), Sensory Analytics and Technologies, Giggenhauser Str. 35, 85354 Freising, Germany.
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Hong A, Zhou S, Yang C, Liu X, Su S, Wang Z. Impact of childhood trauma on the abnormal functional connectivity of brain regions in the fear network model of panic disorder. J Affect Disord 2023; 329:500-510. [PMID: 36858271 DOI: 10.1016/j.jad.2023.02.128] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/21/2023] [Accepted: 02/23/2023] [Indexed: 03/03/2023]
Abstract
BACKGROUND People who have suffered childhood trauma may be more susceptible to panic disorder (PD). Existing evidence indicates that childhood trauma can significantly impact brain function. Meanwhile, the brain regions involved in the fear network model (FNM) of PD highly overlap with the brain regions affected by childhood trauma. However, it remains unclear whether functional connections between brain regions associated with the FNM in patients with PD are affected by childhood trauma. This study aimed to investigate the effects of childhood trauma on the functional connectivity (FC) of brain regions associated with the FNM in patients with PD. METHOD This study recruited 62 patients with PD, including 21 with a high level of childhood trauma (PD_HCT), 41 with a low level of childhood trauma (PD_LCT), and 40 healthy controls (HCs). The patients underwent magnetic resonance imaging resting-state scanning. The amygdala, anterior cingulate, thalamus, and hippocampus were chosen as regions of interest (ROIs) to examine group differences in ROIs and whole-brain resting-state FC (rsFC). RESULTS Compared with PD_HCT patients, PD_LCT patients exhibited significantly increased rsFC in the right thalamus, right temporo-occipital middle temporal gyrus, left thalamus, and right temporo-occipital middle temporal gyrus. Compared with HCs, PD_LCT patients had increased rsFC between the right thalamus and the right temporo-occipital middle temporal gyrus. CONCLUSION Patients with PD who had suffered high and low levels of childhood trauma were found to exhibit different pathological rsFC alterations in the FNM, suggesting that childhood trauma may be an important risk factor for the development of PD symptoms.
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Affiliation(s)
- Ang Hong
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuangyi Zhou
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chen Yang
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xitong Liu
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shanshan Su
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhen Wang
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Wintermann GB, Noack R, Steudte-Schmiedgen S, Weidner K. Cortisol response under low intensity exercise during cognitive-behavioral therapy is associated with therapeutic outcome in panic disorder–an exploratory study. PLoS One 2022; 17:e0273413. [PMID: 36048809 PMCID: PMC9436097 DOI: 10.1371/journal.pone.0273413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 07/15/2022] [Indexed: 11/18/2022] Open
Abstract
Objectives
Patients with Panic Disorder (PD) show an abnormal stress-induced functioning of the Hypothalamic-Pituitary-adrenal (HPA)-axis. Different protocols for stress induction are of rather low relevance for the psychotherapeutic treatment. In practice, interoceptive exposure is often realized as Low Intensity Exercise (LIE), as compared to an incremental cycle exercise test to exhaustion. Currently, it is not known, whether LIE displays an effective interoceptive stressor 1.) leading to a significant anxiety induction; 2.) a comparable HPA- and Sympathetic-Adreno-Medullar (SAM)-axis response in both patients and healthy controls; 3.) stress responses under LIE are associated with treatment outcomes.
Patients and methods
N = 20 patients with PD and n = 20 healthy controls were exposed to ten minutes of LIE on an exercise bike. LIE was applied as part of the interoceptive exposure, during an intensive Cognitive-Behavioral Therapy (CBT) in a day clinic. Heart rate was monitored and salivary cortisol samples collected. Before and after the LIE, state anxiety/ arousal were assessed. In order to evaluate psychopathology, the Panic and Agoraphobia Scale, Mobility Inventory, Agoraphobic Cognitions Questionnaire and Body Sensations Questionnaire were applied, before (T1) and after five weeks (T2) of an intensive CBT.
Results
LIE led to a significant and similar heart rate increase in both groups. Cortisol decreased over time in both groups, especially in male patients. A higher psychopathology before, and after CBT, was associated with a significantly lower cortisol response under LIE.
Conclusions
In the present study, LIE led to a divergent stress response: while there was a significant heart rate increase, cortisol decreased over time, particularly in male patients. A lower reactivity of the HPA-axis seems to be associated with a lower treatment outcome, which may affect extinction based learning. The findings suggest, that interoceptive stimuli should be designed carefully in order to be potent stressors.
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Affiliation(s)
- Gloria-Beatrice Wintermann
- Department of Psychotherapy and Psychosomatic Medicine, University Hospital Carl Gustav Carus Dresden, Technische Universität Dresden, Dresden, Saxony, Germany
- * E-mail:
| | - René Noack
- Department of Psychotherapy and Psychosomatic Medicine, University Hospital Carl Gustav Carus Dresden, Technische Universität Dresden, Dresden, Saxony, Germany
| | - Susann Steudte-Schmiedgen
- Department of Psychotherapy and Psychosomatic Medicine, University Hospital Carl Gustav Carus Dresden, Technische Universität Dresden, Dresden, Saxony, Germany
| | - Kerstin Weidner
- Department of Psychotherapy and Psychosomatic Medicine, University Hospital Carl Gustav Carus Dresden, Technische Universität Dresden, Dresden, Saxony, Germany
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Cengiz GF, Serin Hİ, Cengiz C. Evaluation of olfactory bulb volume and olfactory sulcus depth in patients with panic disorder and depressive disorder: An MRI study. Indian J Psychiatry 2022; 64:171-177. [PMID: 35494332 PMCID: PMC9045350 DOI: 10.4103/indianjpsychiatry.indianjpsychiatry_466_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 11/02/2021] [Accepted: 02/10/2022] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Although some studies have shown decreases in the olfactory bulb (OB) volume and olfactory function in depressive disorder, there are no studies investigating OB volume in patients with panic disorder. AIM The aim of this study was to investigate whether there was a change in OB volume and olfactory sulcus (OS) depth in patients with panic and depressive disorder when compared with the control group, and which group was more affected by comparing the two disease groups. METHODS Data of 51 patients with panic disorder and 56 patients with depressive disorder were obtained by scanning the database of the hospital retrospectively. The control group consisted of 56 subjects without panic and depressive disorder. OB volume and OS depth measurements were performed on cranial magnetic resonance imaging (MRI). RESULTS Bilateral OB volume of the panic and depressive disorder groups were significantly lower than those of the control group. The lowest volume was found in depressive patients. There was no significant difference between the groups with respect to OS measurements. When OB volume and OS depth differences between the genders were evaluated, a statistically significant difference was not determined. CONCLUSION Reduced OB volume was determined in both panic and depressive disorder patients, and clarification of these preliminary findings may contribute to the pathophysiology of panic and depressive disorders.
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Affiliation(s)
- Gül Ferda Cengiz
- Department of Psychiatry, Nose and Throat, Bozok University School of Medicine, Yozgat, Turkey
| | - Halil İbrahim Serin
- Department of Radiology, Nose and Throat, Bozok University School of Medicine, Yozgat, Turkey
| | - Ceyhun Cengiz
- Department of Ear, Nose and Throat, Bozok University School of Medicine, Yozgat, Turkey
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Masuo Y, Satou T, Takemoto H, Koike K. Smell and Stress Response in the Brain: Review of the Connection between Chemistry and Neuropharmacology. Molecules 2021; 26:molecules26092571. [PMID: 33924992 PMCID: PMC8124235 DOI: 10.3390/molecules26092571] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/16/2021] [Accepted: 04/17/2021] [Indexed: 11/24/2022] Open
Abstract
The stress response in the brain is not fully understood, although stress is one of the risk factors for developing mental disorders. On the other hand, the stimulation of the olfactory system can influence stress levels, and a certain smell has been empirically known to have a stress-suppressing effect, indeed. In this review, we first outline what stress is and previous studies on stress-responsive biomarkers (stress markers) in the brain. Subsequently, we confirm the olfactory system and review previous studies on the relationship between smell and stress response by species, such as humans, rats, and mice. Numerous studies demonstrated the stress-suppressing effects of aroma. There are also investigations showing the effects of odor that induce stress in experimental animals. In addition, we introduce recent studies on the effects of aroma of coffee beans and essential oils, such as lavender, cypress, α-pinene, and thyme linalool on the behavior and the expression of stress marker candidates in the brain. The transfer of volatile components into the brain is also discussed while using the results of thyme linalool as an example. These studies may provide a good opportunity to connect chemical research at the molecular level with neuropharmacological approaches in the future.
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Affiliation(s)
- Yoshinori Masuo
- Laboratory of Neuroscience, Department of Biology, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan
- Correspondence: ; Tel.: +81-47-472-5257
| | - Tadaaki Satou
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan;
| | - Hiroaki Takemoto
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan; (H.T.); (K.K.)
| | - Kazuo Koike
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan; (H.T.); (K.K.)
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6
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Calvi E, Quassolo U, Massaia M, Scandurra A, D'Aniello B, D'Amelio P. The scent of emotions: A systematic review of human intra- and interspecific chemical communication of emotions. Brain Behav 2020; 10:e01585. [PMID: 32212329 PMCID: PMC7218249 DOI: 10.1002/brb3.1585] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 01/05/2020] [Accepted: 02/09/2020] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE The sense of olfaction has been considered of minor importance in human communication. In recent years, evidence has emerged that humans might be influenced by unconscious messages sent through chemosignals in body odors. Data concerning the ability of humans to recognize fear, maybe related to the evolutionary role of these emotions in the fight-or-flight reactions, are well known. METHODS To further understand the role of emotional chemosignals in mediating communication in humans and its influence on animal behaviors, we conducted a systematic literature review. RESULTS Chemosignals derived from axillary odors collected under a variety of emotional stimuli and sad tears in humans affect receivers' social interactions, danger detection and risk-taking behavior, social aspects of eating, and performance under stressing conditions. In addition, beyond the fight-or-flight response, even the body odors of happiness can be perceived by others. Furthermore, human chemosignals can influence behaviors and stressful responses in animals, particularly dogs and horses, which may partially explain their special relationship with humans. CONCLUSION Our review highlights the importance of chemosignaling in human intra- and interspecific interactions and suggests the need for further investigations, both in physiological conditions and in patients with psychiatric or neurodegenerative disorders.
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Affiliation(s)
- Elisa Calvi
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - Umberto Quassolo
- Department of Medical Sciences, University of Turin, Turin, Italy
| | | | - Anna Scandurra
- Department of Biology, University of Naples "Federico II", Naples, Italy
| | - Biagio D'Aniello
- Department of Biology, University of Naples "Federico II", Naples, Italy
| | - Patrizia D'Amelio
- Department of Medical Sciences, University of Turin, Turin, Italy.,Department of Medicine, Geriatric Medicine and Geriatric Rehabilitation, CHUV, Lausanne University Hospital, Lausanne, Switzerland
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7
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Maier A, Heinen-Ludwig L, Güntürkün O, Hurlemann R, Scheele D. Childhood Maltreatment Alters the Neural Processing of Chemosensory Stress Signals. Front Psychiatry 2020; 11:783. [PMID: 32848947 PMCID: PMC7425696 DOI: 10.3389/fpsyt.2020.00783] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 07/22/2020] [Indexed: 12/20/2022] Open
Abstract
Accumulating evidence suggests that childhood maltreatment (CM) confers risk for psychopathology later in life by inducing hypervigilance to social threat cues such as fearful faces. However, it remains unclear whether the modulatory impact of CM extents to the olfactory domain of social communication in humans. To address this question, we examined whether CM modulates the neural processing of chemosensory threat signals in sweat and whether CM affects the stress-reducing effects of oxytocin (OXT) in this context. In a randomized, double-blind within-subject functional MRI study design, 58 healthy participants (30 females) received intranasal OXT (40 IU) or placebo (PLC) and completed a forced-choice emotion recognition task with faces of varying emotion intensities (neutral to fearful) while exposed to sweat stimuli and a non-social control odor. Axillary sweat samples were collected from 30 healthy male donors undergoing an acute psychosocial stressor (stress) and ergometer training (sport) as control in a pre-study. CM was assessed by the 25-item Childhood Trauma Questionnaire (CTQ). The final fMRI analysis included 50 healthy participants (26 females). Regression analysis showed a stress-specific association of CTQ scores with amygdala hyperreactivity, hippocampal deactivation, and increased functional connectivity between the amygdala and the hippocampus, medial orbitofrontal cortex, and the anterior cingulate cortex (ACC) under PLC. Furthermore, we observed a positive association of CTQ scores and the dampening effects of OXT on stress-related amygdala responses. Our findings suggest that CM may induce hypervigilance to chemosensory threat cues in a healthy sample due to inefficient frontolimbic inhibition of amygdala activation. Future studies should investigate whether increased recruitment of the intralimbic amygdala-hippocampus complex reflects a compensatory mechanism that prevents the development of psychopathology in those who have experienced CM. Furthermore, the results reveal that the stress-specific effects of OXT in the olfactory domain are more pronounced in participants with increasing levels of CM exposure.
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Affiliation(s)
- Ayline Maier
- Division of Medical Psychology, Department of Psychiatry and Psychotherapy, University Hospital Bonn, Bonn, Germany
| | - Luca Heinen-Ludwig
- Division of Medical Psychology, Department of Psychiatry and Psychotherapy, University Hospital Bonn, Bonn, Germany
| | - Onur Güntürkün
- Department of Psychology, Laboratory for Biological Psychology, Ruhr-University of Bochum, Bochum, Germany
| | - René Hurlemann
- Department of Psychiatry, School of Medicine & Health Sciences, University of Oldenburg, Oldenburg, Germany.,Research Center Neurosensory Science, University of Oldenburg, Oldenburg, Germany
| | - Dirk Scheele
- Division of Medical Psychology, Department of Psychiatry and Psychotherapy, University Hospital Bonn, Bonn, Germany.,Department of Psychiatry, School of Medicine & Health Sciences, University of Oldenburg, Oldenburg, Germany
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8
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Okumura T, Kumazaki H, Singh AK, Touhara K, Okamoto M. Individuals With Autism Spectrum Disorder Show Altered Event-Related Potentials in the Late Stages of Olfactory Processing. Chem Senses 2020; 45:37-44. [PMID: 31711116 DOI: 10.1093/chemse/bjz070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Atypical sensory reactivities are pervasive among people with autism spectrum disorder (ASD). With respect to olfaction, most previous studies have used psychophysical or questionnaire-based methodologies; thus, the neural basis of olfactory processing in ASD remains unclear. This study aimed to determine the stages of olfactory processing that are altered in ASD. Fourteen young adults with high-functioning ASD (mean age, 21 years; 3 females) were compared with 19 age-matched typically developing (TD) controls (mean age, 21 years; 4 females). Olfactory event-related potentials (OERPs) for 2-phenylethyl alcohol-a rose-like odor-were measured with 64 scalp electrodes while participants performed a simple odor detection task. Significant group differences in OERPs were found in 3 time windows 542 ms after the stimulus onset. The cortical source activities in these time windows, estimated using standardized low-resolution brain electromagnetic tomography, were significantly higher in ASD than in TD in and around the posterior cingulate cortex, which is known to play a crucial role in modality-general cognitive processing. Supplemental Bayesian analysis provided substantial evidence for an alteration in the later stages of olfactory processing, whereas conclusive evidence was not provided for the earlier stages. These results suggest that olfactory processing in ASD is altered at least at the later, modality-general processing stage.
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Affiliation(s)
- Toshiki Okumura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
| | - Hirokazu Kumazaki
- Department of Preventive Intervention for Psychiatric Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Archana K Singh
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan.,ERATO Touhara Chemosensory Signal Project, JST, University of Tokyo, Tokyo, Japan
| | - Kazushige Touhara
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan.,ERATO Touhara Chemosensory Signal Project, JST, University of Tokyo, Tokyo, Japan.,WPI International Research Center for Neurointelligence, University of Tokyo Institutes for Advanced Study, Tokyo, Japan
| | - Masako Okamoto
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan.,ERATO Touhara Chemosensory Signal Project, JST, University of Tokyo, Tokyo, Japan
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9
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Ethyl acrylate: influence of sex or atopy on perceptual ratings and eye blink frequency. Arch Toxicol 2019; 93:2913-2926. [DOI: 10.1007/s00204-019-02568-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 09/04/2019] [Indexed: 02/06/2023]
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10
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Oxytocin reduces a chemosensory-induced stress bias in social perception. Neuropsychopharmacology 2019; 44:281-288. [PMID: 29703998 PMCID: PMC6300531 DOI: 10.1038/s41386-018-0063-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 03/02/2018] [Accepted: 04/04/2018] [Indexed: 01/01/2023]
Abstract
Social transmission of fear is not restricted to visual or auditory cues, but extends to the phylogenetically more ancient olfactory domain. Anxious individuals exhibit heightened sensitivity towards chemosensory stress signals in sweat; however, it is still unknown whether endogenous neuromodulators such as the peptide hormone oxytocin (OXT) influence the chemosensory communication of stress. Here, we investigated whether OXT selectively diminishes behavioral and neural responses to social chemosensory stress cues utilizing a randomized, double-blind, placebo (PLC)-controlled, within-subject functional MRI study design. Axillary sweat was obtained from 30 healthy male donors undergoing the Trier Social Stress Test (stress) and bicycle ergometer training (sport). Subsequently, 58 healthy participants (30 females) completed a forced-choice emotional face recognition task with stimuli of varying intensities (neutral to fearful) while they were exposed to both sweat stimuli and a non-social control odor following intranasal OXT or PLC administration, respectively. OXT diminished stress-induced recognition accuracy and response time biases towards fear. On the neural level, OXT reduced stress-evoked responses in the amygdala in both sexes, the anterior cingulate cortex (ACC) in females, and the hippocampus in males. Furthermore, OXT reinstated the functional connectivity between the ACC and the fusiform face area that was disrupted by stress odors under PLC. Our findings reveal a new role for OXT signaling in the modulation of chemosensory communication of stress in humans. Mechanistically, this effect appears to be rooted in a downregulation of stress-induced limbic activations and concomitant strengthening of top-down control descending from the ACC to the fusiform face area.
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11
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Lai CH. Fear Network Model in Panic Disorder: The Past and the Future. Psychiatry Investig 2019; 16:16-26. [PMID: 30176707 PMCID: PMC6354036 DOI: 10.30773/pi.2018.05.04.2] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Accepted: 05/04/2018] [Indexed: 01/04/2023] Open
Abstract
The core concept for pathophysiology in panic disorder (PD) is the fear network model (FNM). The alterations in FNM might be linked with disturbances in the autonomic nervous system (ANS), which is a common phenomenon in PD. The traditional FNM included the frontal and limbic regions, which were dysregulated in the feedback mechanism for cognitive control of frontal lobe over the primitive response of limbic system. The exaggerated responses of limbic system are also associated with dysregulation in the neurotransmitter system. The neuroimaging studies also corresponded to FNM concept. However, more extended areas of FNM have been discovered in recent imaging studies, such as sensory regions of occipital, parietal cortex and temporal cortex and insula. The insula might integrate the filtered sensory information via thalamus from the visuospatial and other sensory modalities related to occipital, parietal and temporal lobes. In this review article, the traditional and advanced FNM would be discussed. I would also focus on the current evidences of insula, temporal, parietal and occipital lobes in the pathophysiology. In addition, the white matter and functional connectome studies would be reviewed to support the concept of advanced FNM. An emerging dysregulation model of fronto-limbic-insula and temporooccipito-parietal areas might be revealed according to the combined results of recent neuroimaging studies. The future delineation of advanced FNM model can be beneficial from more extensive and advanced studies focusing on the additional sensory regions of occipital, parietal and temporal cortex to confirm the role of advanced FNM in the pathophysiology of PD.
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Affiliation(s)
- Chien-Han Lai
- Institute of Biophotonics, National Yang-Ming University, Taipei, Taiwan.,PhD Psychiatry & Neuroscience Clinic, Taoyuan, Taiwan.,Department of Psychiatry, Yeezen General Hospital, Taoyuan, Taiwan
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12
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Asami T, Yoshida H, Takaishi M, Nakamura R, Yoshimi A, Whitford TJ, Hirayasu Y. Thalamic shape and volume abnormalities in female patients with panic disorder. PLoS One 2018; 13:e0208152. [PMID: 30566534 PMCID: PMC6300210 DOI: 10.1371/journal.pone.0208152] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/12/2018] [Indexed: 12/27/2022] Open
Abstract
The thalamus is believed to play crucial role in processing viscero-sensory information, and regulating the activity of amygdala in patients with panic disorder (PD). Previous functional neuroimaging studies have detected abnormal activation in the thalamus in patients with PD compared with healthy control subjects (HC). Very few studies, however, have investigated for volumetric abnormalities in the thalamus in patients with PD. Furthermore, to the best of our knowledge, no previous study has investigated for shape abnormalities in the thalamus in patients with PD. Twenty-five patients with PD and 25 HC participants (all female) were recruited for the study. A voxel-wise volume comparison analysis and a vertex-wise shape analysis were conducted to evaluate structural abnormalities in the PD patients compared to HC. The patients with PD demonstrated significant gray matter volume reductions in the thalamus bilaterally, relative to the HC. The shape analysis detected significant inward deformation in some thalamic regions in the PD patients, including the anterior nucleus, mediodorsal nucleus, and pulvinar nucleus. PD patients showed shape deformations in key thalamic regions that are believed to play a role in regulating emotional and cognitive functions.
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Affiliation(s)
- Takeshi Asami
- Department of Psychiatry, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
- * E-mail:
| | - Haruhisa Yoshida
- Department of Psychiatry, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
| | - Masao Takaishi
- Department of Psychiatry, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
| | - Ryota Nakamura
- Department of Psychiatry, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
| | - Asuka Yoshimi
- Department of Psychiatry, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
| | - Thomas J. Whitford
- School of Psychology, University of New South Wales, Sydney, New South Wales, Australia
| | - Yoshio Hirayasu
- Department of Psychiatry, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
- Heian Hospital, Urazoe, Japan
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13
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Wilkerson AK, Uhde TW, Leslie K, Freeman WC, LaRowe SD, Schumann A, Cortese BM. Paradoxical olfactory function in combat veterans: The role of PTSD and odor factors. MILITARY PSYCHOLOGY 2018; 30:120-130. [PMID: 30220788 DOI: 10.1080/08995605.2018.1425063] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Stress- and trauma-related disorders, including posttraumatic stress disorder (PTSD), are characterized by an increased sensitivity to threat cues. Given that threat detection is a critical function of olfaction and that combat trauma is commonly associated with burning odors, we sought a better understanding of general olfactory function as well as response to specific trauma-related (i.e. burning) odors in combat-related PTSD. Trauma-exposed combat veterans with (N = 22) and without (N = 25) PTSD were assessed for general and specific odor sensitivities using a variety of tools. Both groups had similar general odor detection thresholds. However, the combat veterans with PTSD, compared to combat veterans with comparable trauma exposure, but without PTSD, had increased ratings of odor intensity, negative valence, and odor-triggered PTSD symptoms, along with a blunted heart rate in response to burning rubber odor. These findings are discussed within the context of healthy versus pathological changes in olfactory processing that occur over time after psychological trauma.
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Affiliation(s)
| | - Thomas W Uhde
- Department of Psychiatry and Behavioral Sciences, MUSC, Charleston, SC, US
| | - Kimberly Leslie
- Department of Psychiatry and Behavioral Sciences, MUSC, Charleston, SC, US
| | | | - Steven D LaRowe
- Department of Psychiatry and Behavioral Sciences, MUSC, Charleston, SC, US.,Ralph H. Johnson VAMC, Charleston, SC, US
| | - Aicko Schumann
- Department of Psychiatry and Behavioral Sciences, MUSC, Charleston, SC, US
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14
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Cortese BM, Schumann AY, Howell AN, McConnell PA, Yang QX, Uhde TW. Preliminary evidence for differential olfactory and trigeminal processing in combat veterans with and without PTSD. NEUROIMAGE-CLINICAL 2017; 17:378-387. [PMID: 29159050 PMCID: PMC5683811 DOI: 10.1016/j.nicl.2017.09.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/01/2017] [Accepted: 09/25/2017] [Indexed: 12/16/2022]
Abstract
Structural and functional changes in the olfactory system are increasingly implicated in the expression of PTSD. Still, very little is known about the neurobiological networks of trauma-related odor sensitivity or how they relate to other objective and subjective measures of olfaction and PTSD. The purpose of this study was to replicate prior findings and further characterize olfactory function in trauma-exposed combat veterans with and without PTSD. We also sought to extend this area of research by exploring the effects of time since the combat-related index trauma (TST) on post-trauma olfactory function, as well as by correlating odor-elicited brain activity to general olfactory ability and odor-elicited PTSD symptoms. Participants included combat veterans with PTSD (CV+PTSD; n = 21) or without any psychiatric disorder (CV-PTSD; n = 27). TST was coded as greater (n = 24) or less (n = 24) than 5 years. There were main effects and/or interaction for PTSD-status and TST across several parameters of olfactory function: odor detection, odor identification, ratings for trauma-related odor intensity and triggered PTSD symptoms, and trauma odor-elicited brain activation. Overall, results suggest olfactory impairment in chronic PTSD, but not necessarily in the earlier stages of the disorder, although some early-stage olfactory findings may be predictive of later olfactory impairment. Results also suggest that trauma-exposed individuals who never develop PTSD may demonstrate olfactory resiliency. Finally, results highlight a potentially unique role of trigeminal odor properties in the olfactory-PTSD relationship.
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Affiliation(s)
| | - Aicko Y Schumann
- Department of Psychiatry and Behavioral Sciences, MUSC, Charleston, SC, USA
| | - Ashley N Howell
- Department of Psychiatry and Behavioral Sciences, MUSC, Charleston, SC, USA
| | | | - Qing X Yang
- Department of Radiology, Penn State Hershey Medical Center, Hershey, PA, USA
| | - Thomas W Uhde
- Department of Psychiatry and Behavioral Sciences, MUSC, Charleston, SC, USA
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15
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de Groot JHB, Smeets MAM. Human Fear Chemosignaling: Evidence from a Meta-Analysis. Chem Senses 2017; 42:663-673. [DOI: 10.1093/chemse/bjx049] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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16
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Sobanski T, Wagner G. Functional neuroanatomy in panic disorder: Status quo of the research. World J Psychiatry 2017; 7:12-33. [PMID: 28401046 PMCID: PMC5371170 DOI: 10.5498/wjp.v7.i1.12] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 11/16/2016] [Accepted: 01/14/2017] [Indexed: 02/05/2023] Open
Abstract
AIM To provide an overview of the current research in the functional neuroanatomy of panic disorder.
METHODS Panic disorder (PD) is a frequent psychiatric disease. Gorman et al (1989; 2000) proposed a comprehensive neuroanatomical model of PD, which suggested that fear- and anxiety-related responses are mediated by a so-called “fear network” which is centered in the amygdala and includes the hippocampus, thalamus, hypothalamus, periaqueductal gray region, locus coeruleus and other brainstem sites. We performed a systematic search by the electronic database PubMed. Thereby, the main focus was laid on recent neurofunctional, neurostructural, and neurochemical studies (from the period between January 2012 and April 2016). Within this frame, special attention was given to the emerging field of imaging genetics.
RESULTS We noted that many neuroimaging studies have reinforced the role of the “fear network” regions in the pathophysiology of panic disorder. However, recent functional studies suggest abnormal activation mainly in an extended fear network comprising brainstem, anterior and midcingulate cortex (ACC and MCC), insula, and lateral as well as medial parts of the prefrontal cortex. Interestingly, differences in the amygdala activation were not as consistently reported as one would predict from the hypothesis of Gorman et al (2000). Indeed, amygdala hyperactivation seems to strongly depend on stimuli and experimental paradigms, sample heterogeneity and size, as well as on limitations of neuroimaging techniques. Advanced neurochemical studies have substantiated the major role of serotonergic, noradrenergic and glutamatergic neurotransmission in the pathophysiology of PD. However, alterations of GABAergic function in PD are still a matter of debate and also their specificity remains questionable. A promising new research approach is “imaging genetics”. Imaging genetic studies are designed to evaluate the impact of genetic variations (polymorphisms) on cerebral function in regions critical for PD. Most recently, imaging genetic studies have not only confirmed the importance of serotonergic and noradrenergic transmission in the etiology of PD but also indicated the significance of neuropeptide S receptor, CRH receptor, human TransMEMbrane protein (TMEM123D), and amiloride-sensitive cation channel 2 (ACCN2) genes.
CONCLUSION In light of these findings it is conceivable that in the near future this research will lead to the development of clinically useful tools like predictive biomarkers or novel treatment options.
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Goddard AW. The Neurobiology of Panic: A Chronic Stress Disorder. CHRONIC STRESS (THOUSAND OAKS, CALIF.) 2017; 1:2470547017736038. [PMID: 32440580 PMCID: PMC7219873 DOI: 10.1177/2470547017736038] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 09/05/2017] [Accepted: 09/15/2017] [Indexed: 12/20/2022]
Abstract
Panic disorder is an often chronic and impairing human anxiety syndrome, which frequently results in serious psychiatric and medical comorbidities. Although, to date, there have been many advances in the diagnosis and treatment of panic disorder, its pathophysiology still remains to be elucidated. In this review, recent evidence for a neurobiological basis of panic disorder is reviewed with particular attention to risk factors such as genetic vulnerability, chronic stress, and temperament. In addition, neuroimaging data are reviewed which provides support for the concept of panic disorder as a fear network disorder. The potential impact of the National Institute of Mental Health Research Domain Criteria constructs of acute and chronic threats responses and their implications for the neurobiology of panic disorder are also discussed.
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Affiliation(s)
- Andrew W. Goddard
- UCSF Fresno Medical Education and
Research Program, University of California, San Francisco, USA
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18
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Lai CH, Wu YT. The Explorative Analysis to Revise Fear Network Model for Panic Disorder: Functional Connectome Statistics. Medicine (Baltimore) 2016; 95:e3597. [PMID: 27149492 PMCID: PMC4863809 DOI: 10.1097/md.0000000000003597] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Functional connectome analysis in panic disorder (PDO) is a relatively new field for research. We tried to investigate the functional connectome alterations in PDO to re-examine the precision and role of fear network model for the pathophysiology of PDO.We enrolled 53 PDO patients and 54 controls with imaging data in this study. After preprocessing, we calculated the connectivity matrix of functional connectivity in whole brain for each subject. Then network-based statistics (The University of Melbourne and Melbourne Health, Australia) of connectome was used to perform group comparisons between patients and controls. The correlation between network measures of significant subnetwork and illness duration or severity of PDO was also performed.Within the 6 network models, only 1 network survived after multiple corrections. We found decreased functional connectivity in the edges between the following nodes: the left parahippocampal gyrus, bilateral precentral gyri, bilateral middle cingulate gyri, bilateral supramarginal gyri, bilateral calcarine fissures, and right lingual gyrus. The central hubs were the left parahippocampal gyrus and left precentral gyrus. The importance of limbic areas and connection with sensory and motor regions might shed light on the revision of fear network model for the pathophysiology of PDO.
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Affiliation(s)
- Chien-Han Lai
- From the Department of Psychiatry (C-HL), Cheng Hsin General Hospital, Taipei City; Department of Biomedical Imaging and Radiological Sciences (C-HL, Y-TW); Institute of Biophotonics (C-HL, Y-TW); and Brain Research Center (Y-TW), National Yang-Ming University, Taipei, Taiwan, ROC
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19
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Cui H, Zhang J, Liu Y, Li Q, Li H, Zhang L, Hu Q, Cheng W, Luo Q, Li J, Li W, Wang J, Feng J, Li C, Northoff G. Differential alterations of resting-state functional connectivity in generalized anxiety disorder and panic disorder. Hum Brain Mapp 2016; 37:1459-73. [PMID: 26800659 DOI: 10.1002/hbm.23113] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 12/14/2015] [Accepted: 12/29/2015] [Indexed: 12/12/2022] Open
Abstract
Generalized anxiety disorder (GAD) and panic disorder (PD) are most common anxiety disorders with high lifetime prevalence while the pathophysiology and disease-specific alterations still remain largely unclear. Few studies have taken a whole-brain perspective in the functional connectivity (FC) analysis of these two disorders in resting state. It limits the ability to identify regionally and psychopathologically specific network abnormalities with their subsequent use as diagnostic marker and novel treatment strategy. The whole brain FC using a novel FC metric was compared, that is, scaled correlation, which they demonstrated to be a reliable FC statistics, but have higher statistical power in two-sample t-test of whole brain FC analysis. About 21 GAD and 18 PD patients were compared with 22 matched control subjects during resting-state, respectively. It was found that GAD patients demonstrated increased FC between hippocampus/parahippocampus and fusiform gyrus among the most significantly changed FC, while PD was mainly associated with greater FC between somatosensory cortex and thalamus. Besides such regional specificity, it was observed that psychopathological specificity in that the disrupted FC pattern in PD and GAD correlated with their respective symptom severity. The findings suggested that the increased FC between hippocampus/parahippocampus and fusiform gyrus in GAD were mainly associated with a fear generalization related neural circuit, while the greater FC between somatosensory cortex and thalamus in PD were more likely linked to interoceptive processing. Due to the observed regional and psychopathological specificity, their findings bear important clinical implications for the potential treatment strategy.
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Affiliation(s)
- Huiru Cui
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jie Zhang
- Centre for Computational Systems Biology, Fudan University, Shanghai, People's Republic of China.,Department of Radiology, Jinling Hospital of Nanjing, Nanjing, People's Republic of China
| | - Yicen Liu
- Centre for Computational Systems Biology, Fudan University, Shanghai, People's Republic of China
| | - Qingwei Li
- Department of Psychiatry, Tongji Hospital of Tongji University, Shanghai, People's Republic of China
| | - Hui Li
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Lanlan Zhang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Qiang Hu
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Wei Cheng
- Centre for Computational Systems Biology, Fudan University, Shanghai, People's Republic of China
| | - Qiang Luo
- Centre for Computational Systems Biology, Fudan University, Shanghai, People's Republic of China
| | - Jianqi Li
- Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai, People's Republic of China
| | - Wei Li
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jijun Wang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jianfeng Feng
- Centre for Computational Systems Biology, Fudan University, Shanghai, People's Republic of China.,Department of Computer Science, University of Warwick, Coventry, CV4 7AL, United Kingdom.,Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, People's Republic of China.,Shanghai Center for Mathematical Sciences, Shanghai, People's Republic of China
| | - Chunbo Li
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Georg Northoff
- Institute of Mental Health Research, University of Ottawa, Ottawa, Canada.,Centre for Cognition and Brain Disorders, Hangzhou Normal University, Hangzhou, People's Republic of China.,Centre for Brain and Consciousness, Taipei Medical University (TMU), Taipei, Taiwan
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20
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Zhang X, Bi A, Gao Q, Zhang S, Huang K, Liu Z, Gao T, Zeng W. Advances of Molecular Imaging for Monitoring the Anatomical and Functional Architecture of the Olfactory System. ACS Chem Neurosci 2016; 7:4-14. [PMID: 26616533 DOI: 10.1021/acschemneuro.5b00264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The olfactory system of organisms serves as a genetically and anatomically model for studying how sensory input can be translated into behavior output. Some neurologic diseases are considered to be related to olfactory disturbance, especially Alzheimer's disease, Parkinson's disease, multiple sclerosis, and so forth. However, it is still unclear how the olfactory system affects disease generation processes and olfaction delivery processes. Molecular imaging, a modern multidisciplinary technology, can provide valid tools for the early detection and characterization of diseases, evaluation of treatment, and study of biological processes in living subjects, since molecular imaging applies specific molecular probes as a novel approach to produce special data to study biological processes in cellular and subcellular levels. Recently, molecular imaging plays a key role in studying the activation of olfactory system, thus it could help to prevent or delay some diseases. Herein, we present a comprehensive review on the research progress of the imaging probes for visualizing olfactory system, which is classified on different imaging modalities, including PET, MRI, and optical imaging. Additionally, the probes' design, sensing mechanism, and biological application are discussed. Finally, we provide an outlook for future studies in this field.
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Affiliation(s)
| | | | - Quansheng Gao
- Laboratory of the Animal Center, Academy of Military Medical Sciences, Beijing, 100850, China
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21
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Burón E, Bulbena A, Bulbena-Cabré A. Olfactory functioning in panic disorder. J Affect Disord 2015; 175:292-8. [PMID: 25661394 DOI: 10.1016/j.jad.2015.01.049] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 01/19/2015] [Accepted: 01/19/2015] [Indexed: 10/24/2022]
Abstract
BACKGROUND The olfactory function in panic disorder (PD) has been scarcely approached in the literature. The purpose of this paper is to study this question by focusing on the olfactory sensitivity (i.e. detection threshold), the reactivity to odors, and the odor awareness in patients suffering from PD. METHODS 41 patients with PD and 41 healthy controls performed Sniffin׳ Sticks Test (threshold subtest) and completed the Affective Impact of Odors scale (AIO), the Relational Scale of Olfaction (EROL) and the Odor Awareness Scale (OAS). Clinical symptoms rating scales were concurrently obtained. RESULTS PD patients showed lower olfactory detection thresholds (i.e. higher sensitivity) along with an enhanced reactivity to odors as well as a greater olfactory awareness compared to the healthy controls. The severity of PD was significantly associated with the olfactory questionnaires ratings, but not with the detection ability. Olfactory measures were intercorrelated in most cases. LIMITATIONS i) The results of the olfactory sensitivity are limited to one odorant (phenyl ethyl alcohol) and thus may not be generalizable to other odorants. ii) As comorbid Axis II disorders were not screened, it is not possible to exclude the influence of personality traits in our results. iii) The involvement of the medications in some olfactory outcomes cannot be ruled out. CONCLUSION The current findings highlight the importance of the olfactory function in PD as patients appeared to be highly sensitive, reactive and aware of odors. These results are discussed in the light of the common neural substrates involved in the olfactory processing and in the pathophysiology of PD, and also related to the clinical features of this disorder.
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Affiliation(s)
- Emma Burón
- Autonomous University of Barcelona, Department of Psychiatry and Forensic Medicine (UAB), Bellaterra, Spain.
| | - Antonio Bulbena
- Autonomous University of Barcelona, Department of Psychiatry and Forensic Medicine (UAB), Bellaterra, Spain; Mar Health Park, Neuropsychiatry and Drug Addiction Institute (INAD), Barcelona, Spain
| | - Andrea Bulbena-Cabré
- Autonomous University of Barcelona, Department of Psychiatry and Forensic Medicine (UAB), Bellaterra, Spain; Department of Psychiatry, Metropolitan Hospital Center, New York Medical College, New York, USA
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22
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de Groot JHB, Smeets MAM, Semin GR. Rapid stress system drives chemical transfer of fear from sender to receiver. PLoS One 2015; 10:e0118211. [PMID: 25723720 PMCID: PMC4344325 DOI: 10.1371/journal.pone.0118211] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 01/12/2015] [Indexed: 01/28/2023] Open
Abstract
Humans can register another person's fear not only with their eyes and ears, but also with their nose. Previous research has demonstrated that exposure to body odors from fearful individuals elicited implicit fear in others. The odor of fearful individuals appears to have a distinctive signature that can be produced relatively rapidly, driven by a physiological mechanism that has remained unexplored in earlier research. The apocrine sweat glands in the armpit that are responsible for chemosignal production contain receptors for adrenalin. We therefore expected that the release of adrenalin through activation of the rapid stress response system (i.e., the sympathetic-adrenal medullary system) is what drives the release of fear sweat, as opposed to activation of the slower stress response system (i.e., hypothalamus-pituitary-adrenal axis). To test this assumption, sweat was sampled while eight participants prepared for a speech. Participants had higher heart rates and produced more armpit sweat in the fast stress condition, compared to baseline and the slow stress condition. Importantly, exposure to sweat from participants in the fast stress condition induced in receivers (N = 31) a simulacrum of the state of the sender, evidenced by the emergence of a fearful facial expression (facial electromyography) and vigilant behavior (i.e., faster classification of emotional facial expressions).
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Affiliation(s)
- Jasper H. B. de Groot
- Department of Social and Organizational Psychology, Faculty of Social and Behavioral Sciences, Utrecht University, Utrecht, the Netherlands
| | - Monique A. M. Smeets
- Department of Social and Organizational Psychology, Faculty of Social and Behavioral Sciences, Utrecht University, Utrecht, the Netherlands
| | - Gün R. Semin
- Department of Social and Organizational Psychology, Faculty of Social and Behavioral Sciences, Utrecht University, Utrecht, the Netherlands
- Department of Psychology, Koç University, Istanbul, Turkey
- Instituto Superior de Psicologia Aplicada (ISPA), Instituto Universitário, Lisbon, Portugal
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23
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Lübke KT, Croy I, Hoenen M, Gerber J, Pause BM, Hummel T. Does human body odor represent a significant and rewarding social signal to individuals high in social openness? PLoS One 2014; 9:e94314. [PMID: 24718308 PMCID: PMC3981800 DOI: 10.1371/journal.pone.0094314] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 03/15/2014] [Indexed: 01/31/2023] Open
Abstract
Across a wide variety of domains, experts differ from novices in their response to stimuli linked to their respective field of expertise. It is currently unknown whether similar patterns can be observed with regard to social expertise. The current study therefore focuses on social openness, a central social skill necessary to initiate social contact. Human body odors were used as social cues, as they inherently signal the presence of another human being. Using functional MRI, hemodynamic brain responses to body odors of women reporting a high (n = 14) or a low (n = 12) level of social openness were compared. Greater activation within the inferior frontal gyrus and the caudate nucleus was observed in high socially open individuals compared to individuals low in social openness. With the inferior frontal gyrus being a crucial part of the human mirror neuron system, and the caudate nucleus being implicated in social reward, it is discussed whether human body odor might constitute more of a significant and rewarding social signal to individuals high in social openness compared to individuals low in social openness process.
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Affiliation(s)
- Katrin T. Lübke
- Department of Experimental Psychology, University of Düsseldorf, Düsseldorf, Germany
- * E-mail:
| | - Ilona Croy
- Department of Otorhinolaryngology, University of Dresden Medical School, Dresden, Germany
| | - Matthias Hoenen
- Department of Experimental Psychology, University of Düsseldorf, Düsseldorf, Germany
| | - Johannes Gerber
- Department of Neuroradiology, University of Dresden Medical School, Dresden, Germany
| | - Bettina M. Pause
- Department of Experimental Psychology, University of Düsseldorf, Düsseldorf, Germany
| | - Thomas Hummel
- Department of Otorhinolaryngology, University of Dresden Medical School, Dresden, Germany
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