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Seifzadeh S, Kostek B. Exploring the technological dimension of Autonomous sensory meridian response-induced physiological responses. PeerJ 2024; 12:e17754. [PMID: 39035154 PMCID: PMC11260406 DOI: 10.7717/peerj.17754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 06/25/2024] [Indexed: 07/23/2024] Open
Abstract
Background In recent years, the scientific community has been captivated by the intriguing Autonomous sensory meridian response (ASMR), a unique phenomenon characterized by tingling sensations originating from the scalp and propagating down the spine. While anecdotal evidence suggests the therapeutic potential of ASMR, the field has witnessed a surge of scientific interest, particularly through the use of neuroimaging techniques including functional magnetic resonance imaging (fMRI) as well as electroencephalography (EEG) and physiological measures such as eye tracking (Pupil Diameter), heart rate (HR), heartbeat-evoked potential (HEP), blood pressure (BP), pulse rates (PR), finger photoplethysmography (PPG), and skin conductance (SC). This article is intended to provide a comprehensive overview of technology's contributions to the scientific elucidation of ASMR mechanisms. Methodology A meticulous literature review was undertaken to identify studies that have examined ASMR using EEG and physiological measurements. The comprehensive search was conducted across databases such as PUBMED, SCOPUS, and IEEE, using a range of relevant keywords such as 'ASMR', 'Autonomous sensory meridian response', 'EEG', 'fMRI', 'electroencephalography', 'physiological measures', 'heart rate', 'skin conductance', and 'eye tracking'. This rigorous process yielded a substantial number of 63 PUBMED and 166 SCOPUS-related articles, ensuring the inclusion of a wide range of high-quality research in this review. Results The review uncovered a body of research utilizing EEG and physiological measures to explore ASMR's effects. EEG studies have revealed distinct patterns of brain activity associated with ASMR experiences, particularly in regions implicated in emotional processing and sensory integration. In physiological measurements, a decrease in HR and an increase in SC and pupil diameter indicate relaxation and increased attention during ASMR-triggered stimuli. Conclusions The findings of this review underscore the significance of EEG and physiological measures in unraveling the psychological and physiological effects of ASMR. ASMR experiences have been associated with unique neural signatures, while physiological measures provide valuable insights into the autonomic responses elicited by ASMR stimuli. This review not only highlights the interdisciplinary nature of ASMR research but also emphasizes the need for further investigation to elucidate the mechanisms underlying ASMR and explore its potential therapeutic applications, thereby paving the way for the development of novel therapeutic interventions.
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Affiliation(s)
- Sahar Seifzadeh
- Doctoral School of Gdańsk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Multimedia Systems Department, Gdańsk University of Technology, Gdansk, N/A, Poland
| | - Bozena Kostek
- Faculty of Electronics, Telecommunications and Informatics, Audio Acoustics Laboratory, Gdańsk University of Technology, Gdansk, N/A, Poland
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Costa M, Visentin C, Occhionero M, Tonetti L, Prodi N, Natale V. Pentatonic sequences and monaural beats to facilitate relaxation: an EEG study. Front Psychol 2024; 15:1369485. [PMID: 38686091 PMCID: PMC11056517 DOI: 10.3389/fpsyg.2024.1369485] [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: 01/12/2024] [Accepted: 03/22/2024] [Indexed: 05/02/2024] Open
Abstract
Introduction In two studies we investigated if specific acoustic stimulations could be more effective to induce a relaxation response in comparison to silence. Acoustic stimulations included monaural beats and musical sequences based on a pentatonic scale. Methods In the first study, 47 participants evaluated monaural beats and pentatonic sequences presented through loudspeakers and varying along three frequencies (0.2, 2, 4 Hz). In the second study, 31 participants relaxed with their eyes closed for 10 min during a passive listening of monaural beats and a pentatonic sequence presented through loudspeakers. A silence condition was introduced as control. All auditory stimuli were designed with a temporal modulation of 0.2 Hz. Concomitant EEG was recorded with a 64-channel system and spectral analysis was performed on delta, theta, alpha, beta, and gamma oscillations to test if each of the three auditory stimulations had a significant effect on EEG spectral power in comparison to silence. Results In the first study, pentatonic sequences were evaluated as more pleasant and more relaxing than monaural beats. Pleasantness and relaxation were inversely related to frequency. Visual imagery and emotion induction had higher frequency and were rated with a more positive valence in pentatonic sequences than in monaural beats. In the second study monaural beats in comparison to silence strongly decreased beta and gamma oscillations in the first three minutes and strongly increased theta oscillations in the last three minutes. Pentatonic sequences increased delta, theta, and alpha oscillations in the last three minutes while decreasing beta, and gamma oscillations for the whole auditory stimulation. Discussion The results show that auditory signals with a very low temporal modulation (0.2 Hz) could be more effective than silence in inducing a relaxation response. Although 0.2 Hz monaural beats were effective in inducing a relaxation response, they tended to be perceived as unpleasant. Pentatonic sequences could be considered as a better alternative to promote relaxation by auditory stimulation.
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Affiliation(s)
- Marco Costa
- Department of Psychology “Renzo Canestrari”, University of Bologna, Bologna, Italy
| | - Chiara Visentin
- Department of Engineering, University of Ferrara, Ferrara, Italy
| | - Miranda Occhionero
- Department of Psychology “Renzo Canestrari”, University of Bologna, Bologna, Italy
| | - Lorenzo Tonetti
- Department of Psychology “Renzo Canestrari”, University of Bologna, Bologna, Italy
| | - Nicola Prodi
- Department of Engineering, University of Ferrara, Ferrara, Italy
| | - Vincenzo Natale
- Department of Psychology “Renzo Canestrari”, University of Bologna, Bologna, Italy
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Xie M, Huang Y, Cai W, Zhang B, Huang H, Li Q, Qin P, Han J. Neurobiological Underpinnings of Hyperarousal in Depression: A Comprehensive Review. Brain Sci 2024; 14:50. [PMID: 38248265 PMCID: PMC10813043 DOI: 10.3390/brainsci14010050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 12/26/2023] [Accepted: 12/30/2023] [Indexed: 01/23/2024] Open
Abstract
Patients with major depressive disorder (MDD) exhibit an abnormal physiological arousal pattern known as hyperarousal, which may contribute to their depressive symptoms. However, the neurobiological mechanisms linking this abnormal arousal to depressive symptoms are not yet fully understood. In this review, we summarize the physiological and neural features of arousal, and review the literature indicating abnormal arousal in depressed patients. Evidence suggests that a hyperarousal state in depression is characterized by abnormalities in sleep behavior, physiological (e.g., heart rate, skin conductance, pupil diameter) and electroencephalography (EEG) features, and altered activity in subcortical (e.g., hypothalamus and locus coeruleus) and cortical regions. While recent studies highlight the importance of subcortical-cortical interactions in arousal, few have explored the relationship between subcortical-cortical interactions and hyperarousal in depressed patients. This gap limits our understanding of the neural mechanism through which hyperarousal affects depressive symptoms, which involves various cognitive processes and the cerebral cortex. Based on the current literature, we propose that the hyperconnectivity in the thalamocortical circuit may contribute to both the hyperarousal pattern and depressive symptoms. Future research should investigate the relationship between thalamocortical connections and abnormal arousal in depression, and explore its implications for non-invasive treatments for depression.
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Affiliation(s)
- Musi Xie
- Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, School of Psychology, Center for Studies of Psychological Application, Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou 510631, China; (M.X.); (Y.H.)
| | - Ying Huang
- Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, School of Psychology, Center for Studies of Psychological Application, Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou 510631, China; (M.X.); (Y.H.)
| | - Wendan Cai
- Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou 510631, China; (W.C.); (B.Z.); (H.H.)
| | - Bingqi Zhang
- Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou 510631, China; (W.C.); (B.Z.); (H.H.)
| | - Haonan Huang
- Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou 510631, China; (W.C.); (B.Z.); (H.H.)
| | - Qingwei Li
- Department of Psychiatry, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China;
| | - Pengmin Qin
- Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, School of Psychology, Center for Studies of Psychological Application, Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou 510631, China; (M.X.); (Y.H.)
- Pazhou Laboratory, Guangzhou 510330, China
| | - Junrong Han
- Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou 510631, China; (W.C.); (B.Z.); (H.H.)
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Zafar I, Burles F, Berger L, McLaren-Gradinaru M, David AL, Dhillon I, Iaria G. Anxiety and Depressive Traits in the Healthy Population Does Not Affect Spatial Orientation and Navigation. Brain Sci 2023; 13:1638. [PMID: 38137086 PMCID: PMC10741661 DOI: 10.3390/brainsci13121638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 11/18/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023] Open
Abstract
The ability to navigate and orient in spatial surroundings is critical for effective daily functioning. Such ability is perturbed in clinically diagnosed mood and anxiety disorders, with patients exhibiting poor navigational skills. Here, we investigated the effects of depression and anxiety traits (not the clinical manifestation of the disorders) on the healthy population and hypothesized that greater levels of depression and anxiety traits would manifest in poorer spatial orientation skills and, in particular, with a poor ability to form mental representations of the environment, i.e., cognitive maps. We asked 1237 participants to perform a battery of spatial orientation tasks and complete two questionnaires assessing their anxiety and depression traits. Contrary to our hypothesis, we did not find any correlation between participants' anxiety and depression traits and their ability to form cognitive maps. These findings may imply a significant difference between the clinical and non-clinical manifestations of anxiety and depression as affecting spatial orientation and navigational abilities.
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Affiliation(s)
| | | | | | | | | | | | - Giuseppe Iaria
- Canadian Space Health Research Network, NeuroLab, Department of Psychology, Hotchkiss Brain Institute, Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
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Horváth D, Négyesi J, Rácz M, Győri T, Matics Z, Puskin A, Csipor J, Rácz L. Feasibility of a novel neurofeedback system: a parallel randomized single-blinded pilot study. Sci Rep 2023; 13:17353. [PMID: 37833489 PMCID: PMC10576027 DOI: 10.1038/s41598-023-44545-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 10/10/2023] [Indexed: 10/15/2023] Open
Abstract
Neurocognitive assessment tools have been proposed to optimize, maintain, and improve perceptual-cognitive performance. Here, we investigated the feasibility and efficacy of a novel neurofeedback system, neuroMoon (nM), on cognitive abilities compared with one of the most popular perceptual-cognitive training (PCT) tools both in sports and rehabilitation called NeuroTracker (NT). Thirty-one young athletes performed a comprehensive battery of cognitive tests from the Vienna Test System before and after a 12-session computer-based cognitive training program using nM (n = 11, age 22.6 ± 3.8 years), nM sham (CON, n = 10, age 20.3 ± 1.2 years) or NT (n = 10, age 20.5 ± 1.7 years) device. A series of repeated-measures ANOVA was performed to detect changes in cognitive abilities in response to the training. Participants had faster median reaction time in both the color-naming and word-reading conditions of the Stroop test (all p < 0.005), regardless of group. Regarding the task switching test, statistical analysis indicated faster working time and mean reaction time of the incongruent stimuli, repetition task, and shifting task (all p < 0.005), nevertheless, these changes were also regardless of group. In addition, we found fewer omitted (pre: 17.5 ± 8.3, post: 6.4 ± 1.5, d = 1.311) and more correct (pre: 261.6 ± 36.1, post: 278.6 ± 38.7, d = - 1.020) post-intervention answers in the determination test, regardless of group. Finally, participants in each group performed the digit span backward test with larger post (6.42 ± 1.54) vs. pre (5.55 ± 1.43) scores following the PCT (d = - 0.801). Overall, PCT with nM as compared with NT induced similar results in cognitive abilities suggesting its potential to be used to achieve and maintain better mental performance. However, considering that the sham stimulation also induced similar improvements in cognitive abilities, future studies should clearly determine the cognitive measures that could benefit from NF training.
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Affiliation(s)
- Dávid Horváth
- Department of Kinesiology, Hungarian University of Sports Science, Budapest, Hungary.
- Fit4Race Kft., Budapest, Hungary.
| | - János Négyesi
- Department of Kinesiology, Hungarian University of Sports Science, Budapest, Hungary
- Fit4Race Kft., Budapest, Hungary
- Neurocognitive Research Center, National Institute of Mental Health, Neurology and Neurosurgery, Budapest, Hungary
- Department of Medicine and Science in Sports and Exercise, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Melinda Rácz
- Research Centre for Natural Sciences, Eötvös Loránd Research Network, Budapest, Hungary
- MindRove Kft., Győr, Hungary
- János Szentágothai Doctoral School of Neurosciences, Semmelweis University, Budapest, Hungary
- Selye János Doctoral College for Advanced Studies, Semmelweis University, Budapest, Hungary
| | - Tamás Győri
- Fit4Race Kft., Budapest, Hungary
- Department of Psychology and Sport Psychology, Hungarian University of Sports Science, Budapest, Hungary
| | | | - Artyom Puskin
- MindRove Kft., Győr, Hungary
- Faculty of Electrical Engineering and Informatics, Budapest University of Technology and Economics, Budapest, Hungary
| | | | - Levente Rácz
- Department of Kinesiology, Hungarian University of Sports Science, Budapest, Hungary
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Gueguen L, Henry S, Delbos M, Lemasson A, Hausberger M. Selected Acoustic Frequencies Have a Positive Impact on Behavioural and Physiological Welfare Indicators in Thoroughbred Racehorses. Animals (Basel) 2023; 13:2970. [PMID: 37760370 PMCID: PMC10525862 DOI: 10.3390/ani13182970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 08/12/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
(1) Background: Since antiquity, it is considered that sounds influence human emotional states and health. Acoustic enrichment has also been proposed for domestic animals. However, in both humans and animals, effects vary according to the type of sound. Human studies suggest that frequencies, more than melodies, play a key role. Low and high frequencies, music tuning frequency and even EEG slow waves used for 'neurofeedback' produce effects. (2) Methods: We tested the possible impact of such pure frequencies on racehorses' behavior and physiology. A commercial non-audible acoustic stimulus, composed of an array of the above-mentioned frequencies, was broadcasted twice daily and for three weeks to 12 thoroughbred horses in their home stall. (3) Results: The results show a decrease in stereotypic behaviors and other indicators such as yawning or vacuum chewing, an increase in the time spent in recumbent resting and foraging, and better hematological measures during and after the playback phase for 4 of the 10 physiological parameters measured. (4) Conclusions: These results open new lines of research on possible ways of alleviating the stress related to housing and training conditions in racehorses and of improving physical recovery.
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Affiliation(s)
- Léa Gueguen
- Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)—UMR 6552, 35000 Rennes, France; (S.H.); (M.D.); (A.L.); (M.H.)
- UMR 8002 Integrative Neuroscience and Cognition Center, CNRS, Université Paris-Cité, 75006 Paris, France
| | - Séverine Henry
- Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)—UMR 6552, 35000 Rennes, France; (S.H.); (M.D.); (A.L.); (M.H.)
| | - Maëlle Delbos
- Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)—UMR 6552, 35000 Rennes, France; (S.H.); (M.D.); (A.L.); (M.H.)
| | - Alban Lemasson
- Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)—UMR 6552, 35000 Rennes, France; (S.H.); (M.D.); (A.L.); (M.H.)
- Institut Universitaire de France, 75005 Paris, France
| | - Martine Hausberger
- Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)—UMR 6552, 35000 Rennes, France; (S.H.); (M.D.); (A.L.); (M.H.)
- UMR 8002 Integrative Neuroscience and Cognition Center, CNRS, Université Paris-Cité, 75006 Paris, France
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Kim D, Kim N, Lee Y, Kim S, Kwon J. Sound stimulation using the individual's heart rate to improve the stability and homeostasis of the autonomic nervous system. Physiol Rep 2023; 11:e15816. [PMID: 37726255 PMCID: PMC10509153 DOI: 10.14814/phy2.15816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 09/21/2023] Open
Abstract
OBJECTIVES In this study, we explain the role of enhancing the stability and homeostasis of the autonomic nervous system (ANS) by proposing the average heart rate sound resonance (aHRSR), a sound stimulation to prevent imbalance of ANS due to dynamic movement. The effect of aHRSR on ANS was analyzed through the time and frequency domain of heart rate variability (HRV) using the photoplethysmogram data (PPG) of 22 participants (DUIRB-202109-12). METHOD When the subjects performed dynamic movements that could cause changes in the ANS, HRV indicators using PPG data for 5 min before and after the movements were analyzed according to the presence or absence of aHRSR. The standard deviation of the NN intervals (SDNN), the square root of the mean squared differences of the NN intervals (RMSSD), low-frequency band (LF), and high-frequency band (HF), which represent sympathetic and parasympathetic nerve activity, were used as indicators, where SNDD and LF represent total ANS and sympathetic activity, while RMSSD and HF represent parasympathetic activity. RESULTS As the effects of aHRSR on dynamic movement, the recovery time of RR interval was advanced by about 15 s, SDNN increased from ([44.16 ± 13.11] to [47.85 ± 15.16]) ms, and RMSSD increased from ([23.73 ± 9.95] to [31.89 ± 12.48]) ms (p < 0.05), increasing the stability of the ANS and reducing instability. The effect of homeostasis of the ANS according to aHRSR is also shown in reducing the change rate of LF from (-13.83 to -8.83) %, and the rate of change of HF from (10.59 to 3.27) %. CONCLUSIONS These results suggest that aHRSR can affect the cardiovascular system by assisting physiological movements that occur during dynamic movement.
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Affiliation(s)
- Daechang Kim
- Department of Medical BiotechnologyDongguk UniversityGyeonggi‐doKorea
| | - Nahyeon Kim
- Department of Medical BiotechnologyDongguk UniversityGyeonggi‐doKorea
| | - Younju Lee
- Department of Medical BiotechnologyDongguk UniversityGyeonggi‐doKorea
| | - Sungmin Kim
- Department of Medical BiotechnologyDongguk UniversityGyeonggi‐doKorea
| | - Jiyean Kwon
- Department of Medical Device and HealthcareDongguk UniversitySeoulKorea
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Souchet AD, Lourdeaux D, Burkhardt JM, Hancock PA. Design guidelines for limiting and eliminating virtual reality-induced symptoms and effects at work: a comprehensive, factor-oriented review. Front Psychol 2023; 14:1161932. [PMID: 37359863 PMCID: PMC10288216 DOI: 10.3389/fpsyg.2023.1161932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 05/16/2023] [Indexed: 06/28/2023] Open
Abstract
Virtual reality (VR) can induce side effects known as virtual reality-induced symptoms and effects (VRISE). To address this concern, we identify a literature-based listing of these factors thought to influence VRISE with a focus on office work use. Using those, we recommend guidelines for VRISE amelioration intended for virtual environment creators and users. We identify five VRISE risks, focusing on short-term symptoms with their short-term effects. Three overall factor categories are considered: individual, hardware, and software. Over 90 factors may influence VRISE frequency and severity. We identify guidelines for each factor to help reduce VR side effects. To better reflect our confidence in those guidelines, we graded each with a level of evidence rating. Common factors occasionally influence different forms of VRISE. This can lead to confusion in the literature. General guidelines for using VR at work involve worker adaptation, such as limiting immersion times to between 20 and 30 min. These regimens involve taking regular breaks. Extra care is required for workers with special needs, neurodiversity, and gerontechnological concerns. In addition to following our guidelines, stakeholders should be aware that current head-mounted displays and virtual environments can continue to induce VRISE. While no single existing method fully alleviates VRISE, workers' health and safety must be monitored and safeguarded when VR is used at work.
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Affiliation(s)
- Alexis D. Souchet
- Heudiasyc UMR 7253, Alliance Sorbonne Université, Université de Technologie de Compiègne, CNRS, Compiègne, France
- Institute for Creative Technologies, University of Southern California, Los Angeles, CA, United States
| | - Domitile Lourdeaux
- Heudiasyc UMR 7253, Alliance Sorbonne Université, Université de Technologie de Compiègne, CNRS, Compiègne, France
| | | | - Peter A. Hancock
- Department of Psychology, University of Central Florida, Orlando, FL, United States
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Mahady A, Takac M, De Foe A. What is autonomous sensory meridian response (ASMR)? A narrative review and comparative analysis of related phenomena. Conscious Cogn 2023; 109:103477. [PMID: 36806854 DOI: 10.1016/j.concog.2023.103477] [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: 06/14/2022] [Revised: 01/16/2023] [Accepted: 01/25/2023] [Indexed: 02/17/2023]
Abstract
A narrative review of autonomous sensory meridian response (ASMR) was carried out. Definitional factors relevant to ASMR were canvassed. Related, but distinctly unique, sensorial phenomena, including frisson, synaesthesia, and misophonia were considered. Finally, the status of literature with respect to clinical outcomes, individual differences, and current research applications was evaluated. ASMR is a nascent phenomenon that has rapidly progressed in scope and depth of study throughout the past decade; a notable shift from brief-form studies to an increase in formalised trials is noted. Yet, critical questions remain unaddressed, including expectancy and placebo effects, that future research should interrogate.
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Affiliation(s)
- Aidan Mahady
- School of Health and Biomedical Sciences, RMIT University, Australia
| | - Marcel Takac
- School of Health and Biomedical Sciences, RMIT University, Australia.
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Sakurai N, Nagasaka K, Takahashi S, Kasai S, Onishi H, Kodama N. Brain function effects of autonomous sensory meridian response (ASMR) video viewing. Front Neurosci 2023; 17:1025745. [PMID: 36777643 PMCID: PMC9909086 DOI: 10.3389/fnins.2023.1025745] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 01/11/2023] [Indexed: 01/27/2023] Open
Abstract
Background Autonomous sensory meridian response (ASMR) is the sensation of tingling from audiovisual stimuli that leads to positive emotions. ASMR is used among young people to relax, induce sleep, reduce stress, and alleviate anxiety. However, even without experiencing tingling, ASMR is used by many young people to seek relaxation. Auditory stimulation in ASMR is thought to play the most important role among its triggers, and previous studies have used a mixture of auditory and visual stimulation and auditory stimulation. This is the first study to approach the differences between the effects of direct audiovisual and auditory stimulation from the perspective of brain function using functional magnetic resonance imaging (fMRI) and to clarify the effects of ASMR, which attracts many young people. Methods The subjects were 30 healthy subjects over 19 years old or older who had not experienced tingling. Brain function was imaged by fMRI while watching ASMR videos or listening to the sound files only. We administered a questionnaire based on a Likert scale to determine if the participants felt a "relaxed mood" and "tingling mood" during the task. Results Significant activation was found in the visual cortex for audiovisual stimulation and in the visual and auditory cortex for auditory stimulation. In addition, activation of characteristic sites was observed. The specific sites of activation for audiovisual stimulation were the middle frontal gyrus and the left nucleus accumbens, while the specific sites of activation for auditory stimulation were the bilateral insular cortices. The questionnaire showed no significant differences in either "relaxed mood" or "tingling mood" in response to auditory and visual stimulation or auditory stimulation alone. Conclusion The results of this study showed that there was a clear difference between auditory and audiovisual stimulation in terms of the areas of activation in the brain, but the questionnaire did not reveal any difference in the subjects' mood. Audiovisual stimulation showed activation of the middle frontal gyrus and the nucleus accumbens, whereas auditory stimulation showed activation of the insular cortex. This difference in brain activation sites suggests a difference in mental health effects between auditory and audiovisual stimulation. However, future research on comparisons between those who experience tingling and those who do not, as well as investigations of physiological indices, and examination of the relationship with activated areas in the brain may show that ASMR is useful for mental health.
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Affiliation(s)
- Noriko Sakurai
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata, Japan
| | - Kazuaki Nagasaka
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
| | - Shingo Takahashi
- Department of Healthcare Informatics, Takasaki University of Health and Welfare, Gunma, Japan
| | - Satoshi Kasai
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata, Japan
| | - Hideaki Onishi
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
| | - Naoki Kodama
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata, Japan,*Correspondence: Naoki Kodama,
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Kim D, Woo J, Jeong J, Kim S. The sound stimulation method and EEG change analysis for development of digital therapeutics that can stimulate the nervous system: Cortical activation and drug substitution potential. CNS Neurosci Ther 2023; 29:402-411. [PMID: 36377425 PMCID: PMC9804039 DOI: 10.1111/cns.14014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 10/17/2022] [Accepted: 10/18/2022] [Indexed: 11/16/2022] Open
Abstract
INTRODUCTION The purpose of this study is to propose a treatment method and the effect on the nervous system of digital therapeutics, which is a new treatment method to replace surgery and drug prescription for the treatment and prevention of diseases. METHODS The 20 subjects who participated in the experiment, including men and women, had an average age of 26 ± 2.40 years. The proposed treatment method used three types of sound stimulation and air or bone conduction sound transmission methods to induce total of 6-time EEG electroencephalogram(EEG) changes. EEG was measured with 200 sampling rate each in the P4, Cz, F8 and T7 channel located in the parietal, central, frontal and temporal lobes, respectively, according to the 10/10 system. A total of 2 min of data were created by extracting EEG signals with less noise from the measured data and the extracted data were applied with a 1-40 Hz Butterworth filter and a 50 Hz notch filter with a quality factor of 30. After that, EEG are subdivided into delta (0.5-4 Hz), theta (4-8 Hz), alpha (8-13 Hz), beta (13-30 Hz), and gamma (30-45 Hz) bands. Finally, EEG changes in response to sound stimuli were analyzed using power spectral density and T-test validation in the frequency band. RESULTS When a sound stimulus of less than 1 KHz was stimulated by air conduction, brainstem activation was induced and the reticular activation system was activated. In addition, a great potential for replacing drugs was confirmed by inducing changes in the nervous system similar to drugs used for sedation. CONCLUSION These results will be able to expand the concept of digital therapeutics, and it is expected that it will be developed as a safer treatment method that can replace surgery and drugs.
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Affiliation(s)
- Deachang Kim
- Department of Medical BiotechnologyDongguk University‐Bio Medi CampusSouth Korea
| | - JaeHyun Woo
- Department of R&D SupportResearch Institute for Commercialization of Biomedical Convergence TechnologySeoulSouth Korea
| | - Jeahoon Jeong
- Research Institute for Commercialization of Biomedical Convergence TechnologyDongguk UniversitySouth Korea
| | - Sungmin Kim
- Department of Medical BiotechnologyDongguk University‐Bio Medi CampusSouth Korea
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Lohaus T, Yüksekdag S, Bellingrath S, Thoma P. The effects of Autonomous Sensory Meridian Response (ASMR) videos versus walking tour videos on ASMR experience, positive affect and state relaxation. PLoS One 2023; 18:e0277990. [PMID: 36598891 DOI: 10.1371/journal.pone.0277990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 11/07/2022] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE Autonomous Sensory Meridian Response (ASMR), the experience of a pleasant tingling on the neck and scalp, is known to be triggered by a characteristic type of videos (ASMR videos). The present study examines whether this experience is indeed specific to these ASMR videos, or whether it can also be triggered by other types of videos, e.g. walking tour videos. A further goal was to investigate differences between ASMR-responders and ASMR-non-responders regarding their ASMR sensation and to compare ASMR and walking tour videos with regard to the elicitation of positive affect and state relaxation. METHOD Two online assessments were carried out in two different predominantly student samples, one involving ASMR videos (n = 205) and the other one walking tour videos (n = 96). In both groups, ASMR experience, positive affect and state relaxation were assessed. RESULTS Compared to the walking tour video group, the ASMR-responders in the ASMR video group reported a pronounced ASMR sensation, higher state relaxation and higher positive affect scores. For ASMR-non-responders, lower scores in ASMR sensation, state relaxation and positive affect were revealed compared to the walking tour group. Without differentiating ASMR responder types, the ASMR group showed higher ASMR scores and lower positive affect scores compared to the walking tour group. CONCLUSIONS Watching ASMR videos induced significantly more characteristic ASMR sensations compared to walking tour videos. Since ASMR videos typically include a simulated interaction of the video protagonist with the viewer and walking tour videos do not, the simulated interaction with the viewer might be one important factor for triggering ASMR. As the ASMR observer type (responder or non-responder) is crucial for benefitting from ASMR videos, future scientific evaluation of ASMR needs to consider this differention when evaluating effects of ASMR on mental heath associated domains.
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Affiliation(s)
- Tobias Lohaus
- Neuropsychological Therapy Centre (NTC), Faculty of Psychology, Ruhr University Bochum, Bochum, Germany
| | - Sara Yüksekdag
- Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience (FPN), Maastricht University, Maastricht, The Netherlands
| | - Silja Bellingrath
- Institute of Psychology, Faculty of Educational Sciences, University Duisburg-Essen, Essen, Germany
| | - Patrizia Thoma
- Neuropsychological Therapy Centre (NTC), Faculty of Psychology, Ruhr University Bochum, Bochum, Germany
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Comparison of autonomous sensory meridian response and binaural auditory beats effects on stress reduction: a pilot study. Sci Rep 2022; 12:19521. [PMID: 36376468 PMCID: PMC9663698 DOI: 10.1038/s41598-022-24120-w] [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: 07/06/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to compare the effects of Autonomous sensory meridian response (ASMR) and binaural beat (BB) on stress reduction, and to determine whether ASMR and BB can induce changes in quantitative electroencephalography (QEEG). A double-blind randomized trial was conducted. Subjects with stress were recruited considering their perceived stress scale (PSS), Beck depression inventory-II (BDI-II), insomnia severity index (ISI), and state-trait anxiety inventory-state anxiety (STAI-S) scores. Subjects listened to ASMR or BB with music (8 Hz for daytime, 5 Hz for nighttime) for 15 min in daytime and 30 min before going to sleep for 3 weeks. QEEG was measured before and after the intervention. Seventy-six participants (57 female, mean age = 46.12 ± 12.01) finished the trial. After the intervention, PSS, BDI-II, ISI, STAI-S, and PSQI scores improved significantly in both groups. BDI-II and ISI mean scores were normalized in both groups after the intervention. Changes of absolute beta and high beta power in the ASMR group were larger than those in the BB group (p = 0.026, p = 0.040, respectively). Both ASMR and BB are equally effective in reducing stress levels. Unlike BB, ASMR can lead to an increase in beta and high beta waves associated with cortical arousal.
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Rejer I, Wacewicz D, Schab M, Romanowski B, Łukasiewicz K, Maciaszczyk M. Stressors Length and the Habituation Effect-An EEG Study. SENSORS (BASEL, SWITZERLAND) 2022; 22:6862. [PMID: 36146211 PMCID: PMC9505843 DOI: 10.3390/s22186862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/02/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
The research described in this paper aimed to determine whether people respond differently to short and long stimuli and whether stress stimuli repeated over time evoke a habituation effect. To meet this goal, we performed a cognitive experiment with eight subjects. During this experiment, the subjects were presented with two trays of stress-inducing stimuli (different in length) interlaced with the main tasks. The mean beta power calculated from the EEG signal recorded from the two prefrontal electrodes (Fp1 and Fp2) was used as a stress index. The main results are as follows: (i) we confirmed the previous finding that beta power assessed from the EEG signal recorded from prefrontal electrodes is significantly higher for the STRESS condition compared to NON-STRESS condition; (ii) we found a significant difference in beta power between STRESS conditions that differed in length-the beta power was four times higher for short, compared to long, stress-inducing stimuli; (iii) we did not find enough evidence to confirm (or reject) the hypothesis that stress stimuli repeated over time evoke the habituation effect; although the general trends aggregated over subjects and stressors were negative, their slopes were not statistically significant; moreover, there was no agreement among subjects with respect to the slope of individual trends.
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Aspiotis V, Miltiadous A, Kalafatakis K, Tzimourta KD, Giannakeas N, Tsipouras MG, Peschos D, Glavas E, Tzallas AT. Assessing Electroencephalography as a Stress Indicator: A VR High-Altitude Scenario Monitored through EEG and ECG. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22155792. [PMID: 35957348 PMCID: PMC9371026 DOI: 10.3390/s22155792] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/28/2022] [Accepted: 08/01/2022] [Indexed: 05/28/2023]
Abstract
Over the last decade, virtual reality (VR) has become an increasingly accessible commodity. Head-mounted display (HMD) immersive technologies allow researchers to simulate experimental scenarios that would be unfeasible or risky in real life. An example is extreme heights exposure simulations, which can be utilized in research on stress system mobilization. Until recently, electroencephalography (EEG)-related research was focused on mental stress prompted by social or mathematical challenges, with only a few studies employing HMD VR techniques to induce stress. In this study, we combine a state-of-the-art EEG wearable device and an electrocardiography (ECG) sensor with a VR headset to provoke stress in a high-altitude scenarios while monitoring EEG and ECG biomarkers in real time. A robust pipeline for signal clearing is implemented to preprocess the noise-infiltrated (due to movement) EEG data. Statistical and correlation analysis is employed to explore the relationship between these biomarkers with stress. The participant pool is divided into two groups based on their heart rate increase, where statistically important EEG biomarker differences emerged between them. Finally, the occipital-region band power changes and occipital asymmetry alterations were found to be associated with height-related stress and brain activation in beta and gamma bands, which correlates with the results of the self-reported Perceived Stress Scale questionnaire.
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Affiliation(s)
- Vasileios Aspiotis
- Human Computer Interaction Laboratory (HCILab), Department of Informatics and Telecommunications, University of Ioannina, Kostakioi, 47100 Arta, Greece; (V.A.); (A.M.); (K.K.); (K.D.T.); (N.G.); (E.G.)
- Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece;
| | - Andreas Miltiadous
- Human Computer Interaction Laboratory (HCILab), Department of Informatics and Telecommunications, University of Ioannina, Kostakioi, 47100 Arta, Greece; (V.A.); (A.M.); (K.K.); (K.D.T.); (N.G.); (E.G.)
| | - Konstantinos Kalafatakis
- Human Computer Interaction Laboratory (HCILab), Department of Informatics and Telecommunications, University of Ioannina, Kostakioi, 47100 Arta, Greece; (V.A.); (A.M.); (K.K.); (K.D.T.); (N.G.); (E.G.)
- Institute of Health Science Education, Barts and the London School of Medicine & Dentistry, Queen Mary University of London (Malta Campus), VCT 2520 Victoria, Malta
| | - Katerina D. Tzimourta
- Human Computer Interaction Laboratory (HCILab), Department of Informatics and Telecommunications, University of Ioannina, Kostakioi, 47100 Arta, Greece; (V.A.); (A.M.); (K.K.); (K.D.T.); (N.G.); (E.G.)
- Department of Electrical and Computer Engineering, Faculty of Engineering, University of Western Macedonia, 50100 Kozani, Greece;
| | - Nikolaos Giannakeas
- Human Computer Interaction Laboratory (HCILab), Department of Informatics and Telecommunications, University of Ioannina, Kostakioi, 47100 Arta, Greece; (V.A.); (A.M.); (K.K.); (K.D.T.); (N.G.); (E.G.)
| | - Markos G. Tsipouras
- Department of Electrical and Computer Engineering, Faculty of Engineering, University of Western Macedonia, 50100 Kozani, Greece;
| | - Dimitrios Peschos
- Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece;
| | - Euripidis Glavas
- Human Computer Interaction Laboratory (HCILab), Department of Informatics and Telecommunications, University of Ioannina, Kostakioi, 47100 Arta, Greece; (V.A.); (A.M.); (K.K.); (K.D.T.); (N.G.); (E.G.)
| | - Alexandros T. Tzallas
- Human Computer Interaction Laboratory (HCILab), Department of Informatics and Telecommunications, University of Ioannina, Kostakioi, 47100 Arta, Greece; (V.A.); (A.M.); (K.K.); (K.D.T.); (N.G.); (E.G.)
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EEG based stress analysis using rhythm specific spectral feature for video game play. Comput Biol Med 2022; 148:105849. [PMID: 35870317 DOI: 10.1016/j.compbiomed.2022.105849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND OBJECTIVE For the emerging significance of mental stress, various research directives have been established over time to understand better the causes of stress and how to deal with it. In recent years, the rise of video gameplay has been unprecedented, further triggered by the lockdown imposed due to the COVID-19 pandemic. Several researchers and organizations have contributed to the practical analysis of the impacts of such extended periods of gameplay, which lacks coordinated studies to underline the outcomes and reflect those in future game designing and public awareness about video gameplay. Investigations have mainly focused on the "gameplay stress" based on physical syndromes. Some studies have analyzed the effects of video gameplay with Electroencephalogram (EEG), Magnetic resonance imaging (MRI), etc., without concentrating on the relaxation procedure after video gameplay. METHODS This paper presents an end-to-end stress analysis for video gaming stimuli using EEG. The power spectral density (PSD) of the Alpha and Beta bands is computed to calculate the Beta-to-Alpha ratio (BAR). The Alpha and Beta band power is computed, and the Beta-to-Alpha band power ratio (BAR) has been determined. In this article, BAR is used to denote mental stress. Subjects are chosen based on various factors such as gender, gameplay experience, age, and Body mass index (BMI). EEG is recorded using Scan SynAmps2 Express equipment. There are three types of video gameplay: strategic, puzzle, and combinational. Relaxation is accomplished in this study by using music of various pitches. Two types of regression analysis are done to mathematically model stress and relaxation curve. Brain topography is rendered to indicate the stressed and relaxed region of the brain. RESULTS In the relaxed state, the subjects have BAR 0.701, which is considered the baseline value. Non-gamer subjects have an average BAR of 2.403 for 1 h of strategic video gameplay, whereas gamers have 2.218 BAR concurrently. After 12 minutes of listening to low-pitch music, gamers achieved 0.709 BAR, which is nearly the baseline value. In comparison to Quartic regression, the 4PL symmetrical sigmoid function performs regression analysis with fewer parameters and computational power. CONCLUSION Non-gamers experience more stress than gamers, whereas strategic games stress the human brain more. During gameplay, the beta band in the frontal region is mostly activated. For relaxation, low pitch music is the most useful medium. Residual stress is evident in the frontal lobe when the subjects have listened to high pitch music. Quartic regression and 4PL symmetrical sigmoid function have been employed to find the model parameters of the relaxation curve. Among them, quartic regression performs better in terms of Akaike information criterion (AIC) and R2 measure.
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Eid CM, Hamilton C, Greer JMH. Untangling the tingle: Investigating the association between the Autonomous Sensory Meridian Response (ASMR), neuroticism, and trait & state anxiety. PLoS One 2022; 17:e0262668. [PMID: 35108290 PMCID: PMC8809551 DOI: 10.1371/journal.pone.0262668] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 01/02/2022] [Indexed: 11/19/2022] Open
Abstract
The Autonomous Sensory Meridian Response (ASMR) is an intensely pleasant tingling sensation originating in the scalp and neck and is elicited by a range of online video-induced triggers. Many individuals now regularly watch ASMR videos to relax, and alleviate symptoms of stress and insomnia, all which are indicative of elevated levels of anxiety. Emerging literature suggests that ASMR-capable individuals are characterised by high trait neuroticism, which is associated with a tendency to experience negative emotional states such as anxiety. To date however no literature has empirically linked these personality constructs and watching ASMR videos on the effect of reducing anxiety. In the current study, 36 ASMR-experiencers and 28 non-experiencers watched an ASMR video, and completed assessments of neuroticism, trait anxiety, and pre- / post-video state anxiety. MANCOVA with Group as the independent measures factor showed that ASMR-experiencers had significantly greater scores for neuroticism, trait anxiety, and video engagement than non-experiencers. Pre-video state anxiety was also significantly greater in the ASMR-experiencers and was significantly attenuated on exposure to the ASMR video, whereas non-experiencers reported no difference in state anxiety pre- and post-video. Thus, watching ASMR alleviated state anxiety but only in those who experienced ASMR. Subsequent mediation analyses identified the importance of pre-existing group differences in neuroticism, trait and (pre-video) state anxiety in accounting for the group difference in the reduction of state anxiety. The mediation analysis further lends support for watching ASMR videos as an intervention for the reduction of acute state anxiety. Future areas for research are discussed.
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Affiliation(s)
- Charlotte M. Eid
- Department of Psychology, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Colin Hamilton
- Department of Psychology, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Joanna M. H. Greer
- Department of Psychology, Northumbria University, Newcastle-upon-Tyne, United Kingdom
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Sakurai N, Ohno K, Kasai S, Nagasaka K, Onishi H, Kodama N. Induction of Relaxation by Autonomous Sensory Meridian Response. Front Behav Neurosci 2021; 15:761621. [PMID: 34916914 PMCID: PMC8669134 DOI: 10.3389/fnbeh.2021.761621] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/25/2021] [Indexed: 12/16/2022] Open
Abstract
Background: Autonomous sensory meridian response (ASMR) is used by young people to induce relaxation and sleep and to reduce stress and anxiety; it comprises somatosensation caused by audiovisual stimuli (triggers) that lead to positive emotions. Auditory stimuli play the most important role among the triggers involved in ASMR and have been reported to be more triggering than visual stimuli. On the other hand, classical music is also known to have a relaxing effect. This is the first study to clarify the difference in brain activation associated with relaxation effects between ASMR and classical music by limiting ASMR to auditory stimulation alone. Methods: Thirty healthy subjects, all over 20 years of age, underwent fMRI while listening to ASMR and classical music. We compared the differences in brain activation associated with classical music and ASMR stimulation. After the experiment, the subjects were administered a questionnaire on somatosensation and moods. After the experiment, the participants were asked whether they experienced ASMR somatosensation or frisson. They were also asked to rate the intensity of two moods during stimulation: “comfortable mood,” and “tingling mood”. Result: The results of the questionnaire showed that none of the participants experienced any ASMR somatosensation or frisson. Further, there was no significant difference in the ratings given to comfort mood, but there was a significant difference in those given to tingling mood. In terms of brain function, classical music and ASMR showed significant activation in common areas, while ASMR showed activation in more areas, with the medial prefrontal cortex being the main area of activation during ASMR. Conclusion: Both classical music and the ASMR auditory stimulus produced a pleasant and relaxed state, and ASMR involved more complex brain functions than classical music, especially the activation of the medial prefrontal cortex. Although ASMR was limited to auditory stimulation, the effects were similar to those of listening to classical music, suggesting that ASMR stimulation can produce a pleasant state of relaxation even if it is limited to the auditory component, without the somatic sensation of tingling. ASMR stimulation is easy to use, and appropriate for wellness purposes and a wide range of people.
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Affiliation(s)
- Noriko Sakurai
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata, Japan
| | - Ken Ohno
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata, Japan
| | - Satoshi Kasai
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata, Japan
| | - Kazuaki Nagasaka
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
| | - Hideaki Onishi
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
| | - Naoki Kodama
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata, Japan
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Kurzeck AK, Dechantsreiter E, Wilkening A, Kumpf U, Nenov-Matt T, Padberg F, Palm U. Transcranial Direct Current Stimulation (tDCS) for Depression during Pregnancy: Results from an Open-Label Pilot Study. Brain Sci 2021; 11:brainsci11070947. [PMID: 34356180 PMCID: PMC8304475 DOI: 10.3390/brainsci11070947] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 07/14/2021] [Accepted: 07/17/2021] [Indexed: 11/16/2022] Open
Abstract
INTRODUCTION Depression is the most common morbidity during pregnancy. Available first-line therapy options are limited and depressive disorders in pregnant women are often untreated, leading to negative effects on maternal and fetal health. OBJECTIVES The aim of this open-label pilot study is to extend evidence on the use of transcranial direct current stimulation (tDCS) as a treatment of antenatal depression and to point out options for the use of tDCS in this population. METHODS Six drug-free female patients with major depressive disorder during pregnancy (later than 10th gestational week) were included in this pilot study. Patients were treated with twice-daily tDCS (2 mA, 30 min, anode: F3, cathode: F4) over ten days during inpatient stay (Phase 1) and with once-daily tDCS over 10 days during an optional outpatient stay (Phase 2). Clinical (HAMD-21, BDI) and neuropsychological ratings (Trail Making Test A/B) were performed at baseline, after two and four weeks as well as an obstetric examination. RESULTS Six right-handed females (23-43 years, 12-33. gestational week) completed Phase 1; four patients additionally joined in Phase 2. tDCS was well tolerated and no adverse effects occurred. Clinical ratings showed an improvement of mean baseline HAMD-21 from 22.50 ± 7.56 to 13.67 ± 3.93 after week 2, and to 8.75 ± 4.99 after week 4. The mean baseline BDI was 26.00 ± 13.90 and declined to 11.17 ± 5.46 after week 2, and to 9.25 ± 3.30 after week 4. CONCLUSIONS Statistically significant changes in HAMD-21 and BDI were observed after Phase 1. One patient achieved remission in terms of HAMD in Phase 1. Although this small-scale study lacks sham control, it shows clinical improvement and absence of adverse events in this critical population.
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Affiliation(s)
- Anna Katharina Kurzeck
- Department of Psychiatry, Hospital of the University of Munich, 80336 Munich, Germany; (A.K.K.); (E.D.); (A.W.); (U.K.); (T.N.-M.); (F.P.)
| | - Esther Dechantsreiter
- Department of Psychiatry, Hospital of the University of Munich, 80336 Munich, Germany; (A.K.K.); (E.D.); (A.W.); (U.K.); (T.N.-M.); (F.P.)
| | - Anja Wilkening
- Department of Psychiatry, Hospital of the University of Munich, 80336 Munich, Germany; (A.K.K.); (E.D.); (A.W.); (U.K.); (T.N.-M.); (F.P.)
| | - Ulrike Kumpf
- Department of Psychiatry, Hospital of the University of Munich, 80336 Munich, Germany; (A.K.K.); (E.D.); (A.W.); (U.K.); (T.N.-M.); (F.P.)
| | - Tabea Nenov-Matt
- Department of Psychiatry, Hospital of the University of Munich, 80336 Munich, Germany; (A.K.K.); (E.D.); (A.W.); (U.K.); (T.N.-M.); (F.P.)
| | - Frank Padberg
- Department of Psychiatry, Hospital of the University of Munich, 80336 Munich, Germany; (A.K.K.); (E.D.); (A.W.); (U.K.); (T.N.-M.); (F.P.)
| | - Ulrich Palm
- Department of Psychiatry, Hospital of the University of Munich, 80336 Munich, Germany; (A.K.K.); (E.D.); (A.W.); (U.K.); (T.N.-M.); (F.P.)
- Medical Park Chiemseeblick, Hospital for Psychosomatics, Rasthausstr. 25, 83233 Bernau-Felden, Germany
- Correspondence:
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Ibáñez-Alfonso JA, Company-Córdoba R, García de la Cadena C, Simpson IC, Rivera D, Sianes A. Normative Data for Ten Neuropsychological Tests for the Guatemalan Pediatric Population Updated to Account for Vulnerability. Brain Sci 2021; 11:brainsci11070842. [PMID: 34201999 PMCID: PMC8301765 DOI: 10.3390/brainsci11070842] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 06/18/2021] [Accepted: 06/22/2021] [Indexed: 11/16/2022] Open
Abstract
The Guatemalan pediatric population is affected by a high incidence of poverty and violence. The previous literature showed that these experiences may ultimately impact cognitive performance. The aim of this article is to update the standardized scores for ten neuropsychological tests commonly used in Guatemala considering vulnerability. A total of 347 healthy children and adolescents from 6 to 17 years of age (M = 10.83, SD = 3) were assessed, controlling for intelligence, mental health and neuropsychological history. The standard scores were created using multiple linear regression and standard deviations from residual values. The predictors included were the following: age, age squared (age2), mean parental education (MPE), mean parental education squared (MPE2), gender, and vulnerability, as well as their interaction. The vulnerability status was significant in the scores for language, attention and executive functions. To the best of our knowledge, this is the first study that includes the condition of vulnerability in the calculation of neuropsychological standard scores. The utility of this update is to help in the early detection of special needs in this disadvantaged population, promoting more accurate interventions in order to alleviate the negative effects that living in vulnerable conditions has on children and adolescents.
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Affiliation(s)
- Joaquín A. Ibáñez-Alfonso
- Human Neuroscience Lab, Department of Psychology, Universidad Loyola Andalucía, 41704 Sevilla, Spain; (J.A.I.-A.); (R.C.-C.)
- ETEA Foundation, Development Institute of Universidad Loyola Andalucía, 14004 Córdoba, Spain
| | - Rosalba Company-Córdoba
- Human Neuroscience Lab, Department of Psychology, Universidad Loyola Andalucía, 41704 Sevilla, Spain; (J.A.I.-A.); (R.C.-C.)
- ETEA Foundation, Development Institute of Universidad Loyola Andalucía, 14004 Córdoba, Spain
| | | | - Ian C. Simpson
- Human Neuroscience Lab, Department of Psychology, Universidad Loyola Andalucía, 41704 Sevilla, Spain; (J.A.I.-A.); (R.C.-C.)
- Correspondence:
| | - Diego Rivera
- Department of Health Sciences, Public University of Navarre, 31006 Pamplona, Spain;
| | - Antonio Sianes
- Research Institute on Policies for Social Transformation, Universidad Loyola Andalucía, 14004 Córdoba, Spain;
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Quattropani MC, Sardella A, Morgante F, Ricciardi L, Alibrandi A, Lenzo V, Catalano A, Squadrito G, Basile G. Impact of Cognitive Reserve and Premorbid IQ on Cognitive and Functional Status in Older Outpatients. Brain Sci 2021; 11:824. [PMID: 34206258 PMCID: PMC8301973 DOI: 10.3390/brainsci11070824] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 06/18/2021] [Accepted: 06/20/2021] [Indexed: 11/29/2022] Open
Abstract
The study aimed to investigate cross-sectionally the associations of cognitive reserve (CR) and premorbid IQ with cognitive and functional status in a cohort of older outpatients. Additionally, we evaluated the association of CR and premorbid IQ with the worsening of patients' cognitive status at one-year follow-up. We originally included 141 outpatients (mean age 80.31 years); a telephone-based cognitive follow-up was carried out after one year, including 104 subjects (mean age 80.26 years). CR (β = 0.418), premorbid IQ (β = 0.271) and handgrip strength (β = 0.287) were significantly associated with the MMSE score. The cognitive worsening at follow-up was associated with lower CR, lower MMSE score, reduced gait speed and frailty exhibited at baseline. Univariate linear regressions showed that CR was associated with handgrip strength (β = 0.346), gait speed (β = 0.185), autonomy in basic (β = 0.221) and instrumental (β = 0.272) daily activities, and frailty (β = -0.290); premorbid IQ was significantly associated with autonomy in instrumental daily activities (β = 0.211). These findings highlight the need for integrating CR and premorbid IQ with physical and motor measures when appraising predictors of cognitive decline in the elderly population. The study also newly extends the link of CR and premorbid IQ to the functional status in older adults.
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Affiliation(s)
- Maria C. Quattropani
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (M.C.Q.); (F.M.); (A.C.); (G.S.); (G.B.)
| | - Alberto Sardella
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (M.C.Q.); (F.M.); (A.C.); (G.S.); (G.B.)
| | - Francesca Morgante
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (M.C.Q.); (F.M.); (A.C.); (G.S.); (G.B.)
- Neurosciences Research Centre, Molecular and Clinical Sciences Research Institute, St George’s University of London, London SW17 0RE, UK;
| | - Lucia Ricciardi
- Neurosciences Research Centre, Molecular and Clinical Sciences Research Institute, St George’s University of London, London SW17 0RE, UK;
- Medical Research Council Brain Network Dynamics Unit, Nuffield Department of Clinical Neurosciences, Oxford OX1 3TH, UK
| | - Angela Alibrandi
- Unit of Statistical and Mathematical Science, Department of Economics, University of Messina, 98123 Messina, Italy;
| | - Vittorio Lenzo
- Department of Social and Educational Sciences of the Mediterranean Area, “Dante Alighieri” University for Foreigners of Reggio Calabria, 89125 Reggio Calabria, Italy;
| | - Antonino Catalano
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (M.C.Q.); (F.M.); (A.C.); (G.S.); (G.B.)
| | - Giovanni Squadrito
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (M.C.Q.); (F.M.); (A.C.); (G.S.); (G.B.)
| | - Giorgio Basile
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (M.C.Q.); (F.M.); (A.C.); (G.S.); (G.B.)
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22
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Ghai S, Maso FD, Ogourtsova T, Porxas AX, Villeneuve M, Penhune V, Boudrias MH, Baillet S, Lamontagne A. Neurophysiological Changes Induced by Music-Supported Therapy for Recovering Upper Extremity Function after Stroke: A Case Series. Brain Sci 2021; 11:brainsci11050666. [PMID: 34065395 PMCID: PMC8161385 DOI: 10.3390/brainsci11050666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/12/2021] [Accepted: 05/17/2021] [Indexed: 12/30/2022] Open
Abstract
Music-supported therapy (MST) follows the best practice principles of stroke rehabilitation and has been proven to instigate meaningful enhancements in motor recovery post-stroke. The existing literature has established that the efficacy and specificity of MST relies on the reinforcement of auditory-motor functional connectivity in related brain networks. However, to date, no study has attempted to evaluate the underlying cortical network nodes that are key to the efficacy of MST post-stroke. In this case series, we evaluated changes in connectivity within the auditory-motor network and changes in upper extremity function following a 3-week intensive piano training in two stroke survivors presenting different levels of motor impairment. Connectivity was assessed pre- and post-training in the α- and the β-bands within the auditory-motor network using magnetoencephalography while participants were passively listening to a standardized melody. Changes in manual dexterity, grip strength, movement coordination, and use of the upper extremity were also documented in both stroke survivors. After training, an increase in the clinical measures was accompanied by enhancements in connectivity between the auditory and motor network nodes for both the α- and the β-bands, especially in the affected hemisphere. These neurophysiological changes associated with the positive effects of post-stroke MST on motor outcomes delineate a path for a larger scale clinical trial.
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Affiliation(s)
- Shashank Ghai
- School of Physical and Occupational Therapy, McGill University, Montreal, QC H3G 1Y5, Canada; (T.O.); (M.-H.B.); (A.L.)
- Feil & Oberfeld Research Centre of the Jewish Rehabilitation Hospital–CISSS Laval, A Research Site of the Centre for Interdisciplinary Research of Greater Montreal (CRIR), Laval, QC H7V 1R2, Canada;
- Correspondence:
| | - Fabien Dal Maso
- Laboratory of Simulation and Movement Modelling, School of Kinesiology and Physical Activity, Université de Montréal, Montreal, QC H3T 1J4, Canada;
- Centre Interdisciplinaire de Recherche sur le Cerveau et l’Apprentissage, Montréal, QC H7N 0A5, Canada
| | - Tatiana Ogourtsova
- School of Physical and Occupational Therapy, McGill University, Montreal, QC H3G 1Y5, Canada; (T.O.); (M.-H.B.); (A.L.)
- Feil & Oberfeld Research Centre of the Jewish Rehabilitation Hospital–CISSS Laval, A Research Site of the Centre for Interdisciplinary Research of Greater Montreal (CRIR), Laval, QC H7V 1R2, Canada;
| | - Alba-Xifra Porxas
- Graduate Program in Biological and Biomedical Engineering, McGill University, Montreal, QC H3A 0C3, Canada;
| | - Myriam Villeneuve
- Feil & Oberfeld Research Centre of the Jewish Rehabilitation Hospital–CISSS Laval, A Research Site of the Centre for Interdisciplinary Research of Greater Montreal (CRIR), Laval, QC H7V 1R2, Canada;
| | - Virginia Penhune
- Department of Psychology, Concordia University, Montreal, QC H3G 1M8, Canada;
- Laboratory for Brain Music and Sound (BRAMS), Centre for Research in Brain, Language and Music, Montreal, QC H2V 2S9, Canada
| | - Marie-Hélène Boudrias
- School of Physical and Occupational Therapy, McGill University, Montreal, QC H3G 1Y5, Canada; (T.O.); (M.-H.B.); (A.L.)
- Feil & Oberfeld Research Centre of the Jewish Rehabilitation Hospital–CISSS Laval, A Research Site of the Centre for Interdisciplinary Research of Greater Montreal (CRIR), Laval, QC H7V 1R2, Canada;
| | - Sylvain Baillet
- McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC H3A 2B4, Canada;
| | - Anouk Lamontagne
- School of Physical and Occupational Therapy, McGill University, Montreal, QC H3G 1Y5, Canada; (T.O.); (M.-H.B.); (A.L.)
- Feil & Oberfeld Research Centre of the Jewish Rehabilitation Hospital–CISSS Laval, A Research Site of the Centre for Interdisciplinary Research of Greater Montreal (CRIR), Laval, QC H7V 1R2, Canada;
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23
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Tervaniemi M, Makkonen T, Nie P. Psychological and Physiological Signatures of Music Listening in Different Listening Environments-An Exploratory Study. Brain Sci 2021; 11:brainsci11050593. [PMID: 34063693 PMCID: PMC8147775 DOI: 10.3390/brainsci11050593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/27/2021] [Accepted: 04/30/2021] [Indexed: 11/20/2022] Open
Abstract
We compared music emotion ratings and their physiological correlates when the participants listened to music at home and in the laboratory. We hypothesized that music emotions are stronger in a familiar environment, that is, at home. Participants listened to their self-selected favorite and neutral music excerpts at home and in the laboratory for 10 min in each environment. They completed the questionnaires about their emotional states and gave saliva samples for the analyses of the stress hormone cortisol. We found that in the context of music listening, the participants’ emotion ratings differed between home and the laboratory. Furthermore, the cortisol levels were generally lower at home than in the laboratory and decreased after music listening at home and in the laboratory. However, the modulatory effects of music listening on cortisol levels did not differ between the home and the laboratory. Our exploratory multimethodological data offer novel insight about the psychological and physiological consequences of music listening. These data reveal the sensitivity of the current research methods to investigate human emotions in various contexts without excluding the use of laboratory environment in investigating them.
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Affiliation(s)
- Mari Tervaniemi
- Faculty of Educational Sciences, University of Helsinki, P.O. Box 9, 00014 Helsinki, Finland;
- Cognitive Brain Research Unit, Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, P.O. Box 21, 00014 Helsinki, Finland;
- Correspondence:
| | - Tommi Makkonen
- Cognitive Brain Research Unit, Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, P.O. Box 21, 00014 Helsinki, Finland;
| | - Peixin Nie
- Faculty of Educational Sciences, University of Helsinki, P.O. Box 9, 00014 Helsinki, Finland;
- Cognitive Brain Research Unit, Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, P.O. Box 21, 00014 Helsinki, Finland;
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24
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König N, Steber S, Borowski A, Bliem HR, Rossi S. Neural Processing of Cognitive Control in an Emotionally Neutral Context in Anxiety Patients. Brain Sci 2021; 11:543. [PMID: 33925958 PMCID: PMC8146407 DOI: 10.3390/brainsci11050543] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 01/18/2023] Open
Abstract
Impaired cognitive control plays a crucial role in anxiety disorders and is associated with deficient neural mechanisms in the fronto-parietal network. Usually, these deficits were found in tasks with an emotional context. The present study aimed at investigating electrophysiological and vascular signatures from event-related brain potentials (ERPs) and functional near-infrared spectroscopy (fNIRS) in anxiety patients versus healthy controls during an inhibition task integrated in an emotionally neutral context. Neural markers were acquired during the completion of a classical Eriksen flanker task. The focus of data analysis has been the ERPs N200 and P300 and fNIRS activations in addition to task performance. No behavioral or neural group differences were identified. ERP findings showed a larger N2pc and a delayed and reduced P300 for incongruent stimuli. The N2pc modulation suggests the reorienting of attention to salient stimuli, while the P300 indicates longer lasting stimulus evaluation processes due to increased task difficulty. FNIRS did not result in any significant activation potentially suggesting a contribution from deeper brain areas not measurable with fNIRS. The missing group difference in our non-emotional task indicates that no generalized cognitive control deficit but rather a more emotionally driven deficit is present in anxiety patients.
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Affiliation(s)
- Nicola König
- ICONE-Innsbruck Cognitive Neuroscience, Department for Hearing, Speech and Voice Disorders, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
- Department of Psychology, University of Innsbruck, Innrain 52f, 6020 Innsbruck, Austria
| | - Sarah Steber
- ICONE-Innsbruck Cognitive Neuroscience, Department for Hearing, Speech and Voice Disorders, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
- Department of Psychology, University of Innsbruck, Innrain 52f, 6020 Innsbruck, Austria
| | - Anna Borowski
- ICONE-Innsbruck Cognitive Neuroscience, Department for Hearing, Speech and Voice Disorders, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
- Department of Psychology, University of Innsbruck, Innrain 52f, 6020 Innsbruck, Austria
| | - Harald R. Bliem
- Department of Psychology, University of Innsbruck, Innrain 52f, 6020 Innsbruck, Austria
| | - Sonja Rossi
- ICONE-Innsbruck Cognitive Neuroscience, Department for Hearing, Speech and Voice Disorders, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
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Sagud M, Tudor L, Pivac N. Personalized treatment interventions: nonpharmacological and natural treatment strategies in Alzheimer's disease. Expert Rev Neurother 2021; 21:571-589. [PMID: 33749488 DOI: 10.1080/14737175.2021.1906223] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Introduction: Alzheimer's disease (AD) is a slow, irreversible, progressive, complex, and fatal neurodegenerative disorder. Available pharmacological treatment, known for almost two decades, does not cure the disease, but only alleviates the symptoms, with various efficacy and different side effects. Therefore, there is an unmet need to find other person-centered or personalized approaches to treat AD.Areas covered: This article describes the application of precision medicine-like approaches utilizing nonpharmacological treatment strategies and the use of natural products in personalized care for patients with AD.Expert opinion: Due to the heterogeneity of disease symptoms, somatic conditions, and patient preferences, there is definitely no "one size fits all" intervention. Therefore, individualized treatment choice is based on dementia stage, medical and psychiatric comorbidity, leading symptoms, patient preferences, and remaining capacity of the patient. In the absence of disease-modifying agents, a patient-centered, multidisciplinary team approach appears to be the best option to alleviate the heavy symptomatic burden in this unfortunate population. Hence, appropriate interventions can be offered along the AD continuum, while a better understanding of personal characteristics might help in establishing optimal individualized treatment, as well as its duration and intensity, to deliver interventions in the most effective ways.
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Affiliation(s)
- Marina Sagud
- Department of Psychiatry, Clinical Hospital Centre, Zagreb, Croatia.,School of Medicine, University of Zagreb, Zagreb, Croatia
| | - Lucija Tudor
- Division of Molecular Medicine, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Nela Pivac
- Division of Molecular Medicine, Rudjer Boskovic Institute, Zagreb, Croatia
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26
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Abstract
Domain adaptation manages to learn a robust classifier for target domain, using the source domain, but they often follow different distributions. To bridge distribution shift between the two domains, most of previous works aim to align their feature distributions through feature transformation, of which optimal transport for domain adaptation has attract researchers’ interest, as it can exploit the local information of the two domains in the process of mapping the source instances to the target ones by minimizing Wasserstein distance between their feature distributions. However, it may weaken the feature discriminability of source domain, thus degrade domain adaptation performance. To address this problem, this paper proposes a two-stage feature-based adaptation approach, referred to as optimal transport with dimensionality reduction (OTDR). In the first stage, we apply the dimensionality reduction with intradomain variant maximization but source intraclass compactness minimization, to separate data samples as much as possible and enhance the feature discriminability of the source domain. In the second stage, we leverage optimal transport-based technique to preserve the local information of the two domains. Notably, the desirable properties in the first stage can mitigate the degradation of feature discriminability of the source domain in the second stage. Extensive experiments on several cross-domain image datasets validate that OTDR is superior to its competitors in classification accuracy.
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